SAM C20/C21 Family Data
Sheet
32-bit ARM Cortex-M0+ with 5V Support, CAN-FD, PTC,
and Advanced Analog
Features
Operating Conditions
• 2.7V – 5.5V, -40°C to +125°C, DC to 48 MHz
Core
• ARM® Cortex®-M0+ CPU running at up to 48 MHz
– Single-cycle hardware multiplier
– Micro Trace Buffer
– Memory Protection Unit (MPU)
Memories
• 32/64/128/256 KB in-system self-programmable Flash
• 1/2/4/8 KB independent self-programmable Flash for EEPROM emulation
• 4/8/16/32 KB SRAM Main Memory
System
• Power-on Reset (POR) and Brown-out Detection (BOD)
• Internal and external clock options with 48 MHz to 96 MHz Fractional Digital Phase Locked Loop
(FDPLL96M)
• External Interrupt Controller (EIC) (Interrupt pin debouncing is only available in SAM C21N)
• 16 external interrupts
– Hardware debouncing (only on the 100Pin TQFP)
• One non-maskable interrupt
• Two-pin Serial Wire Debug (SWD) programming, test, and debugging interface
Low-Power
• Idle and Standby Sleep modes
• SleepWalking peripherals
Peripherals
• Hardware Divide and Square Root Accelerator (DIVAS)
• 12-channel Direct Memory Access Controller (DMAC)
• 12-channel Event System
• Up to eight 16-bit Timer/Counters (TC), configurable as either (see Note):
Note: Maximum and minimum capture is only available in SAM C21N devices.
– One 16-bit TC with compare/capture channels
– One 8-bit TC with compare/capture channels
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 1
– One 32-bit TC with compare/capture channels, by using two TCs
• Two 24-bit Timer/Counters and one 16-bit Timer/Counter for Control (TCC), with extended functions:
– Up to four compare channels with optional complementary output
– Generation of synchronized pulse width modulation (PWM) pattern across port pins
– Deterministic fault protection, fast decay and configurable dead-time between complementary
output
– Dithering that increase resolution with up to 5 bit and reduce quantization error
• Frequency Meter (The division reference clock is only available in the SAM C21N)
• 32-bit Real Time Counter (RTC) with clock/calendar function
• Watchdog Timer (WDT)
• CRC-32 generator
• Up to two Controller Area Network (CAN) interfaces:
– CAN 2.0A/B and CAN-FD (ISO 11898-1:2015)
• Each CAN interface have two selectable pin locations to switch between two external CAN
transceivers (without the need for an external switch)
• Up to eight Serial Communication Interfaces (SERCOM), each configurable to operate as either:
– USART with full-duplex and single-wire half-duplex configuration
– I2C up to 3.4 MHz (Except SERCOM6 and SERCOM7)
– SPI
– LIN master/slave
– RS-485
– PMBus
• One Configurable Custom Logic (CCL)
• Up to Two 12-bit, 1 Msps Analog-to-Digital Converter (ADC) with up to 12 channels each (20 unique
channels)
– Differential and single-ended input
– Automatic offset and gain error compensation
– Oversampling and decimation in hardware to support 13-, 14-, 15- or 16-bit resolution
• One 16-bit Sigma-Delta Analog-to-Digital Converter (SDADC) with up to 3 differential channels
• 10-bit, 350 ksps Digital-to-Analog Converter (DAC)
• Up to four Analog Comparators (AC) with Window Compare function
• Integrated Temperature Sensor
• Peripheral Touch Controller (PTC)
– 256-Channel capacitive touch and proximity sensing
I/O
• Up to 84 programmable I/O pins
Qualification
• AEC-Q100 Grade 1 (-40°C to 125°C)
Packages
• 100-pin TQFP
• 64-pin TQFP, VQFN
• 56-pin WLCSP
SAM C20/C21 Family Data Sheet
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 2
• 48-pin TQFP, VQFN
• 32-pin TQFP, VQFN
General
• Drop in compatible with SAM D20 and SAM D21 (see Note)
Note: Only applicable for 32-pin, 48-pin, and 64-pin TQFP and VQFN packages.
SAM C20/C21 Family Data Sheet
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Table of Contents
Features.......................................................................................................................... 1
1. Configuration Summary...........................................................................................14
2. Ordering Information................................................................................................19
3. Block Diagram......................................................................................................... 20
4. Pinout...................................................................................................................... 22
4.1. SAM C21E / SAM C20E.............................................................................................................22
4.2. SAM C21G / SAM C20G............................................................................................................ 23
4.3. SAM C21J / SAM C20J.............................................................................................................. 24
4.4. SAM C21N / SAM C20N............................................................................................................ 26
5. Signal Descriptions List........................................................................................... 27
6. I/O Multiplexing and Considerations........................................................................29
6.1. Multiplexed Signals.................................................................................................................... 29
6.2. Other Functions..........................................................................................................................35
7. Power Supply and Start-Up Considerations............................................................ 38
7.1. Power Domain Overview............................................................................................................38
7.2. Power Supply Considerations.................................................................................................... 39
7.3. Power-Up................................................................................................................................... 41
7.4. Power-On Reset and Brown-Out Detector................................................................................. 42
8. Product Mapping..................................................................................................... 43
9. Memories.................................................................................................................47
9.1. Embedded Memories................................................................................................................. 47
9.2. Physical Memory Map................................................................................................................ 47
9.3. NVM User Row Mapping............................................................................................................48
9.4. NVM Software Calibration Area Mapping...................................................................................49
9.5. NVM Temperature Calibration Area Mapping, SAM C21........................................................... 50
9.6. Serial Number............................................................................................................................ 50
10. Processor and Architecture..................................................................................... 52
10.1. Cortex M0+ Processor............................................................................................................... 52
10.2. Nested Vector Interrupt Controller..............................................................................................54
10.3. Micro Trace Buffer......................................................................................................................57
10.4. High-Speed Bus System............................................................................................................ 58
11. PAC - Peripheral Access Controller.........................................................................61
11.1. Overview.................................................................................................................................... 61
11.2. Features..................................................................................................................................... 61
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11.3. Block Diagram............................................................................................................................ 61
11.4. Product Dependencies...............................................................................................................61
11.5. Functional Description................................................................................................................63
11.6. Register Summary......................................................................................................................66
11.7. Register Description................................................................................................................... 67
12. Peripherals Configuration Summary........................................................................87
12.1. SAM C20/C21 N.........................................................................................................................88
12.2. SAM C20/C21 E/G/J.................................................................................................................. 93
13. DSU - Device Service Unit...................................................................................... 97
13.1. Overview.................................................................................................................................... 97
13.2. Features..................................................................................................................................... 97
13.3. Block Diagram............................................................................................................................ 98
13.4. Signal Description...................................................................................................................... 98
13.5. Product Dependencies............................................................................................................... 98
13.6. Debug Operation........................................................................................................................99
13.7. Chip Erase................................................................................................................................101
13.8. Programming............................................................................................................................102
13.9. Intellectual Property Protection................................................................................................ 102
13.10. Device Identification.................................................................................................................104
13.11. Functional Description..............................................................................................................105
13.12. Register Summary....................................................................................................................110
13.13. Register Description................................................................................................................. 112
14. DIVAS – Divide and Square Root Accelerator.......................................................135
14.1. Overview.................................................................................................................................. 135
14.2. Features................................................................................................................................... 135
14.3. Block Diagram.......................................................................................................................... 135
14.4. Signal Description.................................................................................................................... 135
14.5. Product Dependencies.............................................................................................................135
14.6. Functional Description..............................................................................................................136
14.7. Register Summary....................................................................................................................139
14.8. Register Description................................................................................................................. 139
15. Clock System.........................................................................................................147
15.1. Clock Distribution..................................................................................................................... 147
15.2. Synchronous and Asynchronous Clocks..................................................................................148
15.3. Register Synchronization......................................................................................................... 148
15.4. Enabling a Peripheral...............................................................................................................150
15.5. On-demand, Clock Requests................................................................................................... 150
15.6. Power Consumption vs. Speed................................................................................................ 151
15.7. Clocks after Reset.................................................................................................................... 151
16. GCLK - Generic Clock Controller.......................................................................... 152
16.1. Overview.................................................................................................................................. 152
16.2. Features................................................................................................................................... 152
16.3. Block Diagram.......................................................................................................................... 152
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16.4. Signal Description.................................................................................................................... 153
16.5. Product Dependencies.............................................................................................................153
16.6. Functional Description..............................................................................................................154
16.7. Register Summary....................................................................................................................160
16.8. Register Description................................................................................................................. 161
17. MCLK – Main Clock...............................................................................................171
17.1. Overview.................................................................................................................................. 171
17.2. Features................................................................................................................................... 171
17.3. Block Diagram.......................................................................................................................... 171
17.4. Signal Description.................................................................................................................... 171
17.5. Product Dependencies.............................................................................................................171
17.6. Functional Description..............................................................................................................173
17.7. Register Summary....................................................................................................................178
17.8. Register Description................................................................................................................. 178
18. RSTC – Reset Controller.......................................................................................194
18.1. Overview.................................................................................................................................. 194
18.2. Features................................................................................................................................... 194
18.3. Block Diagram.......................................................................................................................... 194
18.4. Signal Description.................................................................................................................... 194
18.5. Product Dependencies............................................................................................................. 194
18.6. Functional Description..............................................................................................................195
18.7. Register Summary....................................................................................................................198
18.8. Register Description................................................................................................................. 198
19. PM – Power Manager............................................................................................200
19.1. Overview.................................................................................................................................. 200
19.2. Features................................................................................................................................... 200
19.3. Block Diagram.......................................................................................................................... 200
19.4. Signal Description.................................................................................................................... 200
19.5. Product Dependencies.............................................................................................................200
19.6. Functional Description..............................................................................................................201
19.7. Register Summary....................................................................................................................205
19.8. Register Description................................................................................................................. 205
20. OSCCTRL – Oscillators Controller........................................................................208
20.1. Overview.................................................................................................................................. 208
20.2. Features................................................................................................................................... 208
20.3. Block Diagram.......................................................................................................................... 209
20.4. Signal Description.................................................................................................................... 209
20.5. Product Dependencies.............................................................................................................209
20.6. Functional Description..............................................................................................................210
20.7. Register Summary....................................................................................................................220
20.8. Register Description................................................................................................................. 221
21. OSC32KCTRL – 32KHz Oscillators Controller......................................................247
21.1. Overview.................................................................................................................................. 247
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21.2. Features................................................................................................................................... 247
21.3. Block Diagram.......................................................................................................................... 248
21.4. Signal Description.................................................................................................................... 248
21.5. Product Dependencies.............................................................................................................248
21.6. Functional Description..............................................................................................................250
21.7. Register Summary....................................................................................................................256
21.8. Register Description................................................................................................................. 256
22. SUPC – Supply Controller.....................................................................................272
22.1. Overview.................................................................................................................................. 272
22.2. Features................................................................................................................................... 272
22.3. Block Diagram.......................................................................................................................... 273
22.4. Signal Description.................................................................................................................... 273
22.5. Product Dependencies.............................................................................................................273
22.6. Functional Description..............................................................................................................274
22.7. Register Summary....................................................................................................................279
22.8. Register Description................................................................................................................. 279
23. WDT – Watchdog Timer........................................................................................ 293
23.1. Overview.................................................................................................................................. 293
23.2. Features................................................................................................................................... 293
23.3. Block Diagram.......................................................................................................................... 294
23.4. Signal Description.................................................................................................................... 294
23.5. Product Dependencies............................................................................................................. 294
23.6. Functional Description..............................................................................................................295
23.7. Register Summary....................................................................................................................301
23.8. Register Description................................................................................................................. 301
24. RTC – Real-Time Counter..................................................................................... 311
24.1. Overview...................................................................................................................................311
24.2. Features................................................................................................................................... 311
24.3. Block Diagram.......................................................................................................................... 311
24.4. Signal Description.................................................................................................................... 312
24.5. Product Dependencies.............................................................................................................312
24.6. Functional Description..............................................................................................................314
24.7. Register Summary - Mode 0 - 32-Bit Counter.......................................................................... 320
24.8. Register Description - Mode 0 - 32-Bit Counter....................................................................... 320
24.9. Register Summary - Mode 1 - 16-Bit Counter.......................................................................... 334
24.10. Register Description - Mode 1 - 16-Bit Counter....................................................................... 334
24.11. Register Summary - Mode 2 - Clock/Calendar.........................................................................349
24.12. Register Description - Mode 2 - Clock/Calendar......................................................................349
25. DMAC – Direct Memory Access Controller........................................................... 364
25.1. Overview.................................................................................................................................. 364
25.2. Features................................................................................................................................... 364
25.3. Block Diagram.......................................................................................................................... 366
25.4. Signal Description.................................................................................................................... 366
25.5. Product Dependencies.............................................................................................................366
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25.6. Functional Description..............................................................................................................367
25.7. Register Summary....................................................................................................................389
25.8. Register Description................................................................................................................. 390
25.9. Register Summary - SRAM...................................................................................................... 423
25.10. Register Description - SRAM................................................................................................... 423
26. EIC – External Interrupt Controller........................................................................ 430
26.1. Overview.................................................................................................................................. 430
26.2. Features................................................................................................................................... 430
26.3. Block Diagram.......................................................................................................................... 430
26.4. Signal Description.................................................................................................................... 431
26.5. Product Dependencies.............................................................................................................431
26.6. Functional Description..............................................................................................................433
26.7. Register Summary....................................................................................................................440
26.8. Register Description................................................................................................................. 441
27. NVMCTRL – Nonvolatile Memory Controller.........................................................456
27.1. Overview.................................................................................................................................. 456
27.2. Features................................................................................................................................... 456
27.3. Block Diagram.......................................................................................................................... 456
27.4. Signal Description.................................................................................................................... 457
27.5. Product Dependencies............................................................................................................. 457
27.6. Functional Description..............................................................................................................458
27.7. Register Summary....................................................................................................................466
27.8. Register Description................................................................................................................. 467
28. PORT - I/O Pin Controller......................................................................................482
28.1. Overview.................................................................................................................................. 482
28.2. Features................................................................................................................................... 482
28.3. Block Diagram.......................................................................................................................... 483
28.4. Signal Description.................................................................................................................... 483
28.5. Product Dependencies.............................................................................................................483
28.6. Functional Description..............................................................................................................485
28.7. Register Summary....................................................................................................................491
28.8. Register Description................................................................................................................. 492
29. EVSYS – Event System........................................................................................ 512
29.1. Overview.................................................................................................................................. 512
29.2. Features................................................................................................................................... 512
29.3. Block Diagram.......................................................................................................................... 512
29.4. Signal Description.................................................................................................................... 513
29.5. Product Dependencies.............................................................................................................513
29.6. Functional Description..............................................................................................................514
29.7. Register Summary....................................................................................................................518
29.8. Register Description................................................................................................................. 520
30. SERCOM – Serial Communication Interface.........................................................537
30.1. Overview.................................................................................................................................. 537
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30.2. Features................................................................................................................................... 537
30.3. Block Diagram.......................................................................................................................... 538
30.4. Signal Description.................................................................................................................... 538
30.5. Product Dependencies.............................................................................................................538
30.6. Functional Description..............................................................................................................540
31. SERCOM USART - SERCOM Synchronous and Asynchronous Receiver and
Transmitter.............................................................................................................546
31.1. Overview.................................................................................................................................. 546
31.2. USART Features...................................................................................................................... 546
31.3. Block Diagram.......................................................................................................................... 547
31.4. Signal Description.................................................................................................................... 547
31.5. Product Dependencies.............................................................................................................547
31.6. Functional Description..............................................................................................................549
31.7. Register Summary....................................................................................................................563
31.8. Register Description................................................................................................................. 564
32. SERCOM SPI – SERCOM Serial Peripheral Interface..........................................587
32.1. Overview.................................................................................................................................. 587
32.2. Features................................................................................................................................... 587
32.3. Block Diagram.......................................................................................................................... 588
32.4. Signal Description.................................................................................................................... 588
32.5. Product Dependencies............................................................................................................. 588
32.6. Functional Description..............................................................................................................590
32.7. Register Summary....................................................................................................................599
32.8. Register Description................................................................................................................. 600
33. SERCOM I2C – Inter-Integrated Circuit.................................................................618
33.1. Overview.................................................................................................................................. 618
33.2. Features................................................................................................................................... 618
33.3. Block Diagram.......................................................................................................................... 619
33.4. Signal Description.................................................................................................................... 619
33.5. Product Dependencies.............................................................................................................619
33.6. Functional Description..............................................................................................................621
33.7. Register Summary - I2C Slave.................................................................................................640
33.8. Register Description - I2C Slave...............................................................................................640
33.9. Register Summary - I2C Master...............................................................................................656
33.10. Register Description - I2C Master............................................................................................ 657
34. CAN - Control Area Network................................................................................. 674
34.1. Overview.................................................................................................................................. 674
34.2. Features................................................................................................................................... 674
34.3. Block Diagram.......................................................................................................................... 675
34.4. Signal Description.................................................................................................................... 675
34.5. Product Dependencies.............................................................................................................675
34.6. Functional Description..............................................................................................................677
34.7. Register Summary....................................................................................................................698
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34.8. Register Description................................................................................................................. 702
34.9. Message RAM..........................................................................................................................771
35. TC – Timer/Counter...............................................................................................781
35.1. Overview.................................................................................................................................. 781
35.2. Features................................................................................................................................... 781
35.3. Block Diagram.......................................................................................................................... 782
35.4. Signal Description.................................................................................................................... 782
35.5. Product Dependencies.............................................................................................................783
35.6. Functional Description..............................................................................................................784
35.7. Register Description................................................................................................................. 800
36. TCC – Timer/Counter for Control Applications...................................................... 869
36.1. Overview.................................................................................................................................. 869
36.2. Features................................................................................................................................... 869
36.3. Block Diagram.......................................................................................................................... 870
36.4. Signal Description.................................................................................................................... 871
36.5. Product Dependencies............................................................................................................. 871
36.6. Functional Description..............................................................................................................873
36.7. Register Summary....................................................................................................................907
36.8. Register Description................................................................................................................. 909
37. CCL – Configurable Custom Logic........................................................................954
37.1. Overview.................................................................................................................................. 954
37.2. Features................................................................................................................................... 954
37.3. Block Diagram.......................................................................................................................... 955
37.4. Signal Description.................................................................................................................... 955
37.5. Product Dependencies.............................................................................................................955
37.6. Functional Description..............................................................................................................957
37.7. Register Summary....................................................................................................................968
37.8. Register Description................................................................................................................. 968
38. ADC – Analog-to-Digital Converter........................................................................973
38.1. Overview.................................................................................................................................. 973
38.2. Features................................................................................................................................... 973
38.3. Block Diagram.......................................................................................................................... 974
38.4. Signal Description.................................................................................................................... 974
38.5. Product Dependencies.............................................................................................................975
38.6. Functional Description..............................................................................................................976
38.7. Register Summary....................................................................................................................991
38.8. Register Description................................................................................................................. 992
39. SDADC – Sigma-Delta Analog-to-Digital Converter............................................1020
39.1. Overview................................................................................................................................ 1020
39.2. Features................................................................................................................................. 1020
39.3. Block Diagram........................................................................................................................ 1021
39.4. Signal Description.................................................................................................................. 1021
39.5. Product Dependencies........................................................................................................... 1022
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39.6. Functional Description............................................................................................................1023
39.7. Register Summary..................................................................................................................1031
39.8. Register Description............................................................................................................... 1032
40. AC – Analog Comparators...................................................................................1057
40.1. Overview................................................................................................................................ 1057
40.2. Features................................................................................................................................. 1057
40.3. Block Diagram........................................................................................................................ 1058
40.4. Signal Description.................................................................................................................. 1059
40.5. Product Dependencies...........................................................................................................1059
40.6. Functional Description............................................................................................................1061
40.7. Register Summary..................................................................................................................1071
40.8. Register Description............................................................................................................... 1071
41. DAC – Digital-to-Analog Converter......................................................................1088
41.1. Overview................................................................................................................................ 1088
41.2. Features................................................................................................................................. 1088
41.3. Block Diagram........................................................................................................................ 1088
41.4. Signal Description.................................................................................................................. 1088
41.5. Product Dependencies...........................................................................................................1088
41.6. Functional Description............................................................................................................1090
41.7. Register Summary..................................................................................................................1095
41.8. Register Description............................................................................................................... 1095
42. Peripheral Touch Controller (PTC).......................................................................1108
42.1. Overview.................................................................................................................................1108
42.2. Features................................................................................................................................. 1108
42.3. Block Diagram........................................................................................................................ 1108
42.4. Signal Description...................................................................................................................1109
42.5. System Dependencies............................................................................................................1109
42.6. Functional Description.............................................................................................................1111
43. TSENS – Temperature Sensor.............................................................................1112
43.1. Overview.................................................................................................................................1112
43.2. Features..................................................................................................................................1112
43.3. Block Diagram.........................................................................................................................1112
43.4. Signal Description...................................................................................................................1112
43.5. Product Dependencies............................................................................................................1113
43.6. Functional Description............................................................................................................ 1114
43.7. Register Summary.................................................................................................................. 1118
43.8. Register Description................................................................................................................1118
44. FREQM – Frequency Meter.................................................................................1137
44.1. Overview.................................................................................................................................1137
44.2. Features................................................................................................................................. 1137
44.3. Block Diagram........................................................................................................................ 1137
44.4. Signal Description...................................................................................................................1137
44.5. Product Dependencies........................................................................................................... 1137
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44.6. Functional Description............................................................................................................ 1139
44.7. Register Summary..................................................................................................................1142
44.8. Register Description............................................................................................................... 1142
45. Electrical Characteristics 85°C (SAM C20/C21 E/G/J)........................................ 1152
45.1. Disclaimer...............................................................................................................................1152
45.2. Absolute Maximum Ratings....................................................................................................1152
45.3. General Operating Ratings.....................................................................................................1152
45.4. Injection Current..................................................................................................................... 1153
45.5. Supply Characteristics............................................................................................................1154
45.6. Maximum Clock Frequencies................................................................................................. 1155
45.7. Power Consumption............................................................................................................... 1156
45.8. Wake-Up Time........................................................................................................................1158
45.9. I/O Pin Characteristics............................................................................................................1158
45.10. Analog Characteristics........................................................................................................... 1159
45.11. NVM Characteristics...............................................................................................................1177
45.12. Oscillator Characteristics........................................................................................................1178
45.13. Timing Characteristics............................................................................................................1186
46. Electrical Characteristics 105°C (SAM C20/C21 E/G/J)......................................1190
46.1. Disclaimer...............................................................................................................................1190
46.2. General Operating Ratings.....................................................................................................1190
46.3. Power Consumption............................................................................................................... 1190
46.4. Analog Characteristics............................................................................................................1191
46.5. NVM Characteristics...............................................................................................................1196
46.6. Oscillator Characteristics........................................................................................................1197
47. Electrical Characteristics 105°C (SAM C20/C21 N)............................................ 1200
47.1. Disclaimer...............................................................................................................................1200
47.2. General Operating Ratings.....................................................................................................1200
47.3. Power Consumption............................................................................................................... 1201
47.4. Analog Characteristics........................................................................................................... 1202
47.5. NVM Characteristics...............................................................................................................1212
47.6. Oscillator Characteristics........................................................................................................1212
48. AEC Q-100 Grade 1, 125°C Electrical Characteristics (SAM C20/C21 E/G/J)... 1217
48.1. Electrical Characteristics at 125°C Disclaimer....................................................................... 1217
48.2. General Operating Ratings.....................................................................................................1217
48.3. Supply Characteristics............................................................................................................1217
48.4. Power Consumption............................................................................................................... 1217
48.5. I/O Pin Characteristics............................................................................................................1220
48.6. Analog Characteristics........................................................................................................... 1220
48.7. NVM Characteristics...............................................................................................................1231
48.8. Oscillator Characteristics........................................................................................................1232
48.9. Timing Characteristics............................................................................................................1236
49. Packaging Information.........................................................................................1238
49.1. Package Marking Information.................................................................................................1238
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49.2. Thermal Considerations......................................................................................................... 1242
49.3. Package Drawings................................................................................................................. 1243
49.4. Soldering Profile.....................................................................................................................1265
50. Schematic Checklist............................................................................................ 1266
50.1. Introduction.............................................................................................................................1266
50.2. Operation in Noisy Environment.............................................................................................1266
50.3. Power Supply......................................................................................................................... 1266
50.4. External Analog Reference Connections............................................................................... 1268
50.5. External Reset Circuit.............................................................................................................1270
50.6. Unused or Unconnected Pins.................................................................................................1270
50.7. Clocks and Crystal Oscillators................................................................................................1271
50.8. Programming and Debug Ports..............................................................................................1274
51. Revision History...................................................................................................1278
51.1. Revision C - 01/2019..............................................................................................................1278
51.2. Revision B - 06/2017 .............................................................................................................1279
51.3. Revision A - 03/2017..............................................................................................................1279
51.4. Rev KJ - 11/2016....................................................................................................................1280
51.5. Rev J - 10/2016......................................................................................................................1280
51.6. Rev I - 09/2016.......................................................................................................................1280
51.7. Rev H - 05/2016..................................................................................................................... 1283
51.8. Rev G - 04/2015.....................................................................................................................1283
51.9. Rev F - 02/2015......................................................................................................................1285
51.10. Rev E - 12/2015..................................................................................................................... 1286
51.11. Rev D - 09/2015..................................................................................................................... 1287
51.12. Rev C - 09/2015.....................................................................................................................1287
51.13. Rev B - 06/2015..................................................................................................................... 1287
51.14. Rev A - 04/2015..................................................................................................................... 1288
The Microchip Web Site............................................................................................ 1289
Customer Change Notification Service......................................................................1289
Customer Support..................................................................................................... 1289
Product Identification System....................................................................................1290
Microchip Devices Code Protection Feature............................................................. 1290
Legal Notice...............................................................................................................1291
Trademarks............................................................................................................... 1291
Quality Management System Certified by DNV.........................................................1292
Worldwide Sales and Service....................................................................................1293
SAM C20/C21 Family Data Sheet
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1. Configuration Summary
Table 1-1. SAM C20 Device-specific Features
Device Flash (KB) SRAM (KB)
ATSAMC20E15 32 4
ATSAMC20E16 64 8
ATSAMC20E17 128 16
ATSAMC20E18 256 32
ATSAMC20G15 32 4
ATSAMC20G16 64 8
ATSAMC20G17 128 16
ATSAMC20G18 256 32
ATSAMC20J15 32 4
ATSAMC20J16 64 8
ATSAMC20J17 128 16
ATSAMC20J18 256 32
ATSAMC20N17 128 16
ATSAMC20N18 256 32
Table 1-2. SAM C21 Device-specific Features
Device Flash (KB) SRAM (KB)
ATSAMC21E15 32 4
ATSAMC21E16 64 8
ATSAMC21E17 128 16
ATSAMC21E18 256 32
ATSAMC21G15 32 4
ATSAMC21G16 64 8
ATSAMC21G17 128 16
ATSAMC21G18 256 32
ATSAMC21J15 32 4
ATSAMC21J16 64 8
ATSAMC21J17 128 16
ATSAMC21J18 256 32
ATSAMC21N17 128 16
SAM C20/C21 Family Data Sheet
Configuration Summary
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 14
...........continued
Device Flash (KB) SRAM (KB)
ATSAMC21N18 256 32
Table 1-3. SAM C21 Family Features
SAM C21N SAM C21J SAM C21G SAM C21E
Pins 100 64 (56 for WLCSP) 48 32
General Purpose I/O-pins
(GPIOs)
84 52 (44 for WLCSP) 38 26
Flash 256/128 KB 256/128/64/32 KB 256/128/64/32 KB 256/128/64/32 KB
Flash RWW section 8/4 KB 8/4/2/1 KB 8/4/2/1 KB 8/4/2/1 KB
System SRAM 32/16 KB 32/16/8/4 KB 32/16/8/4 KB 32/16/8/4 KB
Timer Counter (TC) instances 8 5 5 5
Waveform output channels per
TC instance
2 2 2 2
TC Maximum and Minimum
Capture
Yes No No No
Timer Counter for Control (TCC)
instances
3 3 3 3
Waveform output channels per
TCC
8/4/2 8/4/2 8/4/2 6/4/2
DMA channels 12 12 12 12
CAN interface 2 2 2 1
Configurable Custom Logic
(CCL) (LUTs)
4 4 4 4
Serial Communication Interface
(SERCOM) instances
8 6 6 4
Divide and Square Root
Accelerator (DIVAS)
Yes Yes Yes Yes
Analog-to-Digital Converter
(ADC) channels
20 20 14 10
Analog-to-Digital Converter
(ADC) instances
2 2 2 2
Sigma-Delta Analog-to-Digital
Converter (SDADC) channels
3 3 2 1
Analog Comparators (AC) 4 4 4 4
Digital-to-Analog Converter
(DAC) channels
1 1 1 1
SAM C20/C21 Family Data Sheet
Configuration Summary
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 15
...........continued
SAM C21N SAM C21J SAM C21G SAM C21E
Temperature Sensor (TSENS)(1) 1 1 1 1
Real-Time Counter (RTC) Yes Yes Yes Yes
RTC alarms 1 1 1 1
RTC compare values One 32-bit value or
two 16-bit values
One 32-bit value or
two 16-bit values
One 32-bit value or
two 16-bit values
One 32-bit value or
two 16-bit values
External Interrupt lines 16 with HW
debouncing
16 16 16
Peripheral Touch Controller
(PTC)
Number of self-capacitance
channels (Y-lines)
32 32 22 16
Peripheral Touch Controller
(PTC)
Number of mutual-capacitance
channels (X x Y lines)
256 (16x16) 256 (16x16) 121 (11x11) 64 (8x8)
Frequency Meter (FREQM)
reference clock divider
Yes Yes Yes Yes
Maximum CPU frequency 48 MHz
Packages TQFP VQFN
TQFP
WLCSP
VQFN
TQFP
VQFN
TQFP
Oscillators 32.768 kHz crystal oscillator (XOSC32K)
0.4-32 MHz crystal oscillator (XOSC)
32.768 kHz internal oscillator (OSC32K)
32 kHz ultra low-power internal oscillator (OSCULP32K)
48 MHz high-accuracy internal oscillator (OSC48M)
96 MHz Fractional Digital Phased Locked Loop (FDPLL96M)
Event System channels 12 12 12 12
SW Debug Interface Yes Yes Yes Yes
Watchdog Timer (WDT) Yes Yes Yes Yes
Note:
1. TSENS is not available in AEC Q-100 qualified device part numbers.
SAM C20/C21 Family Data Sheet
Configuration Summary
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 16
Table 1-4. SAM C20 Family Features
SAM C20N SAM C20J SAM C20G SAM C20E
Pins 100 64 (56 for WLCSP) 48 (44 for WLCSP) 32
General Purpose I/O-pins
(GPIOs)
84 52 38 26
Flash 256/128 KB 256/128/64/32 KB 256/128/64/32 KB 256/128/64/32 KB
Flash RWW section 8/4 KB 8/4/2/1 KB 8/4/2/1 KB 8/4/2/1 KB
System SRAM 32/16 KB 32/16/8/4 KB 32/16/8/4 KB 32/16/8/4 KB
Timer Counter (TC) instances 8 5 5 5
Waveform output channels per
TC instance
2 2 2 2
TC Maximum and Minimum
Capture
Yes No No No
Timer Counter for Control (TCC)
instances
3 3 3 3
Waveform output channels per
TCC
8/4/2 8/4/2 8/4/2 6/4/2
DMA channels 12 6 6 6
Configurable Custom Logic
(CCL) (LUTs)
4 4 4 4
Serial Communication Interface
(SERCOM) instances
8 4 4 4
Divide and Square Root
Accelerator (DIVAS)
Yes Yes Yes Yes
Analog-to-Digital Converter
(ADC) channels
12 12 12 10
Analog-to-Digital Converter
(ADC) instances
1 1 1 1
Analog Comparators (AC) 4 2 2 2
Real-Time Counter (RTC) Yes Yes Yes Yes
RTC alarms 1 1 1 1
RTC compare values One 32-bit value or
two 16-bit values
One 32-bit value or
two 16-bit values
One 32-bit value or
two 16-bit values
One 32-bit value or
two 16-bit values
External Interrupt lines 16 with HW debouncing 16 16 16
SAM C20/C21 Family Data Sheet
Configuration Summary
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 17
...........continued
SAM C20N SAM C20J SAM C20G SAM C20E
Peripheral Touch Controller
(PTC)
Number of self-capacitance
channels (Y-lines)
32 32 22 16
Peripheral Touch Controller
(PTC)
Number of mutual-capacitance
channels (X x Y lines)
256 (16x16) 256 (16x16) 120 (12x10) 60 (10x6)
Frequency Meter (FREQM)
reference clock divider
Yes Yes Yes Yes
Maximum CPU frequency 48 MHz
Packages TQFP VQFN
TQFP
WLCSP
VQFN
TQFP
VQFN
TQFP
Oscillators 32.768 kHz crystal oscillator (XOSC32K)
0.4-32 MHz crystal oscillator (XOSC)
32.768 kHz internal oscillator (OSC32K)
32 kHz ultra low-power internal oscillator (OSCULP32K)
48 MHz high-accuracy internal oscillator (OSC48M)
96 MHz Fractional Digital Phased Locked Loop (FDPLL96M)
Event System channels 6 6 6 6
SW Debug Interface Yes Yes Yes Yes
Watchdog Timer (WDT) Yes Yes Yes Yes
Related Links
6. I/O Multiplexing and Considerations
SAM C20/C21 Family Data Sheet
Configuration Summary
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 18
2. Ordering Information
ATSAMC 21 N 18 A - M U T
Product Family
E = 32 Pins
G = 48 Pins
J = 64 Pins
N = 100 Pins
No character = Tray (Default)
T = Tape and Reel
U = -40 - 85°C Matte Sn Plating
N = -40 - 105°C Matte Sn Plating
Z = -40°C - 125°C Matte Sn
Plating (AEC-Q100 Qualified)
A = TQFP
M = VQFN
U = WLCSP
21 = Cortex M0+ CPU, DMA, CAN,
16-bit SDADC
SAMC = 5V Microcontroller
Product Series
Flash Memory Density
Device Variant
A = Default Variant
Pin Count
Package Carrier
Package Grade
Package Type
18 = 256KB
17 = 128KB
16 = 64KB
15 = 32KB
20 = Cortex M0+ CPU, DMA
(3)
(4)(5)
Note:
1. Not all combinations are valid. The available ordering numbers are listed in the Configuration
Summary.
2. SAM C2xN product is available only for the 105°C temperature grade.
3. The AEC-Q100 Grade 1 qualified version is only offered for SAM C20/C21 E/G/J in the TQFP and
VQFN packages. The VQFN package will have wettable flanks, and both TQFP and VQFN
packages are assembled with gold bond wires.
4. Devices in the WLCSP package include a factory programmed Bootloader. Please contact your
local Microchip sales office for more information.
5. The WLCSP package type is available only with the package Grade U.
SAM C20/C21 Family Data Sheet
Ordering Information
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 19
3. Block Diagram
Figure 3-1. System Block Diagram for SAM C20/C21
6 x SERCOM
8 x Timer Counter
AHB-APB
BRIDGE C
M
M
HIGH SPEED
BUS MATRIX
PORT
PORT
SERIAL
WIRE
SWDIO
S
CORTEX-M0+
PROCESSOR
Fmax 48 MHz
SWCLK
DEVICE
SERVICE
UNIT
AHB-APB
BRIDGE A
2x 12-CHANNEL
12-bit ADC 1MSPS
AIN[11..0]
VREFA
AIN[7..0]
S
SRAM
CONTROLLER
32/16KB
RAM
M
5x TIMER / COUNTER
EVENT SYSTEM
S
6x SERCOM
4 ANALOG
COMPARATORS
X[15..0]
Y[15..0]
PERIPHERAL
TOUCH
CONTROLLER
AHB-APB
BRIDGE B
VREFA
VOUT
10-bit DAC
PERIPHERAL
ACCESS CONTROLLER
S
PAD0
WO1
PAD1
PAD2
PAD3
WO0
256/128KB
RWW
NVM
NVM
CONTROLLER
Cache
M
DMA
2x CAN
3x TIMER / COUNTER
FOR CONTROL
WOn
IOBUS
DMA
DMA
DMA
DMA
DMA
MICRO
TRACE BUFFER
S
WO0
WO1
TxD
RxD
3-CHANNEL
16-bit SDADC 3KSPS
AIN[5..0]
VREFB
DMA
REAL TIME
COUNTER
WATCHDOG
TIMER
RESETN
OSCILLATORS CONTROLLER
XOUT
XIN
XOUT32
XIN32
OSCULP32K
OSC32K
OSC48M
XOSC32K
XOSC
EXTERNAL INTERRUPT
CONTROLLER
MAIN CLOCKS
CONTROLLER
EXTINT[15..0]
NMI
GCLK_IO[7..0]
FDPLL96M
GENERIC CLOCK
CONTROLLER
POWER
MANAGER
RESET
CONTROLLER
OSC32K CONTROLLER
SUPPLY CONTROLLER
VREF
BOD55
VREG
DivideAccellerator S
DMA
TEMPERATURE
SENSOR
FREQUENCY
METER
6 x SERCOM
3x TIMER / COUNTER
2x SERCOM
PAD0
WO1
PAD1
PAD2
PAD3
WO0
DMA
DMA
AHB-APB
BRIDGE D
S
3.3V VREG
SAM C20/C21 Family Data Sheet
Block Diagram
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 20
Note: Not all features are available for all devices. Please refer to Table 1-3 and Table 1-4 to determine
feature availability for the particular device.
Related Links
6.2.5 TCC Configurations
6.1 Multiplexed Signals
SAM C20/C21 Family Data Sheet
Block Diagram
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 21
4. Pinout
4.1 SAM C21E / SAM C20E
4.1.1 VQFN32/TQFP32
PA00 1
PA01 2
PA02 3
PA03 4
PA04 5
PA05 6
PA06 7
PA07 8
VDDANA 9
GND 10
PA08 11
PA09 12
PA10 13
PA11 14
PA14 15
PA15 16
PA25
24
PA24
23
PA23
22
PA22
21
PA19
20
PA18
19
PA17
18
PA16
17
PA27
25
RESETN
26
PA28
27
GND
28
VDDCORE
29
VDDIN
30
PA30
31
PA31
32
DIGITAL PIN
ANALOG PIN
OSCILLATOR
GROUND
INPUT SUPPLY
REGULATED OUTPUT SUPPLY
RESET PIN
SAM C20/C21 Family Data Sheet
Pinout
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 22
4.2 SAM C21G / SAM C20G
4.2.1 VQFN48 / TQFP48
PA21
PA00 1
PA01 2
PA02 3
PA03 4
GNDANA 5
VDDANA 6
PB08 7
PB09 8
PA04 9
PA05 10
PA06 11
PA07 12
PA08 13
PA09 14
PA10 15
PA11 16
VDDIO 17
GND 18
PB10 19
PB11 20
PA12 21
PA13 22
PA14 23
PA15 24
VDDIO36
GND35
PA2534
PA2433
PA2332
PA2231
30
PA2029
PA1928
PA1827
PA1726
PA1625
PB22
37
PB23
38
PA27
39
RESETN
40
PA28
41
GND
42
VDDCORE
43
VDDIN
44
PA30
45
PA31
46
PB02
47
PB03
48
DIGITAL PIN
ANALOG PIN
OSCILLATOR
GROUND
INPUT SUPPLY
REGULATED OUTPUT SUPPLY
RESET PIN
SAM C20/C21 Family Data Sheet
Pinout
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 23
4.3 SAM C21J / SAM C20J
4.3.1 VQFN64/TQFP64
PA00 1
PA01 2
PA02 3
PA03 4
PB04 5
PB05 6
GNDANA 7
VDDANA 8
PB06 9
PB07 10
PB08 11
PB09 12
PA04 13
PA05 14
PA06 15
PA07 16
PA08 17
PA09 18
PA10 19
PA11 20
VDDIO 21
GND 22
PB10 23
PB11
24
PB12 25
PB13 26
PB14 27
PB15 28
PA12 29
PA13 30
PA14 31
PA15 32
VDDIO48
GND47
PA2546
PA2445
PA2344
PA2243
PA2142
PA2041
PB1740
PB1639
PA1938
PA1837
PA1736
PA1635
VDDIO34
GND33
PB22
49
PB23
50
PA27
51
RESETN
52
PA28
53
GND
54
VDDCORE
55
VDDIN
56
PA30
57
PA31
58
PB30
59
PB31
60
PB00
61
PB01
62
PB02
63
PB03
64
DIGITAL PIN
ANALOG PIN
OSCILLATOR
GROUND
INPUT SUPPLY
REGULATED OUTPUT SUPPLY
RESET PIN
SAM C20/C21 Family Data Sheet
Pinout
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 24
4.3.2 WLCSP56
1
2
3
4
5
6
7
ABCDEFGH
PA00
PA01
PA03
PB08
PB09
PA04
PA06
PB01
PB02
PA02
PA09
PA05
PA07
PA08
PA31
PB00
PB03
VDDANA
VDDIO
PA10
PA11
PA30
VDDIN
GNDANA
GND
PB12
PB11
PB10
VDDCORE
GND
VDDIO
GND
PB15
PB14
PB13
PA28
PA23
VDDIO
GND
PA13
PA12
PB23
PA27
PA24
PA20
PA18
PA14
PA15
PB22
PA25
PA22
PA21
PA19
PA17
PA16
DIGITAL PIN
ANALOG PIN
OSCILLATOR
GROUND
INPUT SUPPLY
REGULATED OUTPUT SUPPLY
RESET PIN
RESETN
SAM C20/C21 Family Data Sheet
Pinout
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 25
4.4 SAM C21N / SAM C20N
4.4.1 TQFP100
1
2
3
4
44
43
42
41
40
39
38
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
37
36
35
34
12
13
14
15
16
17
18
19
20
21
22
45
46
47
48
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
70
69
68
67
66
65
74
73
72
71
75
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
RESETN
VDDIN
GND
PA28
VDDIO
GND
VDDANA
PB01
PB00
PB03
PB02
PB30
PB31
PC05
PA07
PA06
PA04
PA05
PB08
PB09
PA12
PA13
PA14
PA15
PC08
PC09
PC12
PC13
PC10
PC11
PB25
PB24
PC07
PB23
PB22
PA01
PA00
PC26
PC24
PC25
PC06
PC27
PA31
PA30
VDDCORE
PA27
PA08
PA09
PA10
PA11
PA16
PA17
PA18
PA19
VDDIO
PA24
PA25
PA21
PA22
PA20
PA23
PB18
PB19
PB16
PB17
PC21
PC20
PC18
PC19
PC17
PC16
PC14
PB12
PB11
PB10
PC15
PB15
PB13
PB14
GND
VDDIO
VDDIO
GND
PB05
PB04
PA02
PA03
PB07
PB06
PC02
PC03
PC01
PC00
GND
VDDIO
PC28
GND
PB20
GND
PB21
DIGITAL PIN
ANALOG PIN
OSCILLATOR
GROUND
INPUT SUPPLY
REGULATED OUTPUT SUPPLY
RESET PIN
SAM C20/C21 Family Data Sheet
Pinout
© 2019 Microchip Technology Inc. Datasheet DS60001479C-page 26