AT91M40807-33AI - Atmel Corporation

Features

•Incorporates the ARM7TDMI™ARM®Thumb®Processor Core

– High-performance 32-bit RISC Architecture

– High-density 16-bit Instruction Set

– Leader in MIPS/Watt

– Embedded ICE (In-Circuit Emulation)

•8K Bytes of On-chip SRAM

–32-bitDataBus

– Single-clock Cycle Access

•128K Bytes of On-chip ROM

–32-bitDataBus

– Single-clock Cycle Access

•Fully Programmable External Bus Interface (EBI)

– Maximum External Address Space of 64M Bytes

– Upto8ChipSelects

– Software Programmable 8/16-bit External Databus

•8-level Priority, Individually Maskable, Vectored Interrupt Controller

– 4 External Interrupts, Including a High-priority Low-latency Interrupt Request

•32 Programmable I/O Lines

•3-channel 16-bit Timer/Counter

– 3 External Clock Inputs

– 2 Multi-purpose I/O Pins per Channel

•2USARTs

•2 Dedicated Peripheral Data Controller (PDC) Channels per USART

•Programmable Watchdog Timer

•Advanced Power-saving Features

– CPU and Peripherals Can be Deactivated Individually

•Fully Static Operation:

– 0 Hz to 33 MHz Internal Frequency Range at 3.0V, 85°C

•1.8V to 3.6V Operating Range

•-40°Cto+85°C Temperature Range

•Available in a 100-lead TQFP Package

Description

The AT91M40807 microcontroller is a member of the Atmel AT91 16/32-bit Microcon-

troller family, which is based on the ARM7TDMI processor core. This processor has a

high-performance 32-bit RISC architecture with a high-density 16-bit instruction set

and very low power consumption. In addition, a large number of internally banked reg-

isters result in very fast exception handling, making the device ideal for real-time

control applications.

The AT91M40807 microcontroller features a direct connection to off-chip memory,

including Flash, through the fully programmable External Bus Interface (EBI). An

eight-level priority vectored interrupt controller, in conjunction with the Peripheral Data

Controller, significantly improves the real-time performance of the device.

The device is manufactured using Atmel’s high-density CMOS technology. By combin-

ing the ARM7TDMI processor core with an on-chip high-speed SRAM and ROM

memory and a wide range of peripheral functions on a monolithic chip, the

AT91M40807 is a powerful microcontroller that offers a flexible, cost-effective solution

to many compute-intensive embedded control applications.

AT91

ARM®Thumb®

Microcontrollers

AT91M40807

Summary

Rev. 1371CS–ATARM–02/02

Note: This is a summary document. A complete document is

available on our web site at www.atmel.com.

2AT91M40807

1371CS–ATARM–02/02

Pin Configuration

Figure 1. AT91M40807 Pinout (Top View)

P21/TXD1/NTRI

P20/SCK1

P19

P18

P17

P16

P15/RXD0

P14/TXD0

P13/SCK0

P12/FIQ

GND

P11/IRQ2

P10/IRQ1

VDD

P9/IRQ0

P8/TIOB2

P7/TIOA2

P6/TCLK2

P5/TIOB1

P4/TIOA1

P3/TCLK1

GND

P2/TIOB0

P1/TIOA0

P0/TCLK0

D15

D14

D13

D12

VDD

D11

D10

GND

P31/A23/CS4

P30/A22/CS5

VDD

P29/A21/CS6

P22/RXD1

NWR1/NUB

GND

NRST

NWDOVF

VDD

MCKI

P23

P24/BMS

P25/MCKO

GND

TMS

TDO

TCK

NRD/NOE

NWR0/NWE

VDD

NWAIT

NCS0

NCS1

P26/NCS2

P27/NCS3

A0/NLB

A2A2

VDD

A10

A11

A12

A13

A14

GND

A15

A16

A17

A18

A19

P28/A20/CS7

GND

100-lead TQFP

116

100

TDI

AT91M40807

1371CS–ATARM–02/02

Pin Description

Table 1. AT91M40807 Pin Description

Module Name Function Type

Active

Level Comments

EBI

A0 - A23 Address Bus Output —All valid after reset

D0 - D15 Data Bus I/O —

NCS0 - NCS3 Chip Select Output Low

CS4 - CS7 Chip Select Output High A23 - A20 after reset

NWR0 Lower Byte 0 Write Signal Output Low Used in Byte Write option

NWR1 Upper Byte 1 Write Signal Output Low Used in Byte Write option

NRD Read Signal Output Low Used in Byte Write option

NWE Write Enable Output Low Used in Byte Select option

NOE Output Enable Output Low Used in Byte Select option

NUB Upper Byte Select Output Low Used in Byte Select option

NLB Lower Byte Select Output Low Used in Byte Select option

NWAIT Wait Input Input Low

BMS Boot Mode Select Input —Sampled during reset

AIC FIQ Fast Interrupt Request Input —PIO-controlled after reset

IRQ0 - IRQ2 External Interrupt Request Input —PIO-controlled after reset

TCLK0 - TCLK2 Timer External Clock Input —PIO-controlled after reset

TIOA0 - TIOA2 Multipurpose Timer I/O pin A I/O —PIO-controlled after reset

TIOB0 - TIOB2 Multipurpose Timer I/O pin B I/O —PIO-controlled after reset

USART

SCK0 - SCK1 External Serial Clock I/O —PIO-controlled after reset

TXD0 - TXD1 Transmit Data Output Output —PIO-controlled after reset

RXD0 - RXD1 Receive Data Input Input —PIO-controlled after reset

PIO P0 - P31 Parallel IO line I/O —

WD NWDOVF Watchdog overflow Output Low Open - drain

Clock MCKI Master Clock Input Input —Schmidt trigger

MCKO Master Clock Output Output —

Reset NRST Hardware Reset Input Input Low Schmidt trigger

NTRI Tri-state Mode Select Input Low Sampled during reset

ICE

TMS Test Mode Select Input —Schmidt trigger, internal pull-up

TDI Test Data Input Input —Schmidt trigger, internal pull-up

TDO Test Data Output Output —

TCK Test Clock Input —Schmidt trigger, internal pull-up

Power VDD Power Power —

GND Ground Ground —

4AT91M40807

1371CS–ATARM–02/02

Block Diagram

Figure 2. AT91M40807

ARM7TDMI Core

Embedded

ICE

Reset

EBI: External Bus Interface

ASB

Controller

Clock

AIC: Advanced

Interrupt Controller

AMBA Bridge

EBI User

Interface

TC: Timer

Counter

TC0

TC1

TC2

USART0

USART1

2 PDC

Channels

2 PDC

Channels

PIO: Parallel I/O Controller

PS: Power Saving

Chip ID

WD: Watchdog

Timer

APB

ASB

NRST

D0-D15

A1-A19

A0/NLB

NRD/NOE

NWR0/NWE

NWR1/NUB

NWAIT

NCS0

NCS1

P26/NCS2

P27/NCS3

P28/A20/CS7

P29/A21/CS6

P30/A22/CS5

P31/A23/CS4

P0/TCLK0

P3/TCLK1

P6/TCLK2

P1/TIOA0

P2/TIOB0

P4/TIOA1

P5/TIOB1

P7/TIOA2

P8/TIOB2

NWDOVF

TMS

TDO

TDI

TCK

MCKI

P25/MCKO

P12/FIQ

P9/IRQ0

P10/IRQ1

P11/IRQ2

P13/SCK0

P14/TXD0

P15/RXD0

P20/SCK1

P21/TXD1/NTRI

P22/RXD1

P16

P17

P18

P19

P23

P24/BMS

8K-byte RAM

128K-byte ROM

AT91M40807

1371CS–ATARM–02/02

Architectural

Overview

The AT91M40807 microcontroller integrates an ARM7TDMI with Embedded ICE inter-

face, memories and peripherals. The architecture consists of two main buses, the

Advanced System Bus (ASB) and the Advanced Peripheral Bus (APB). Designed for

maximum performance and controlled by the memory controller, the ASB interfaces the

ARM7TDMI microcontroller with the on-chip 32-bit memories, the External Bus Interface

(EBI) and the AMBA Bridge. The AMBA Bridge drives the APB, which is designed for

accesses to on-chip peripherals and optimized for low power consumption.

The AT91M40807 microcontroller implements the ICE port of the ARM7TDMI microcon-

troller on dedicated pins, offering a complete, low-cost and easy-to-use debug solution

for target debugging.

Memories The AT91M40807 microcontrollers embed 8K bytes of internal SRAM and 128K bytes of

ROM. The internal memory is directly connected to the 32-bit data bus and is single-

cycle accessible. This provides maximum performance of 36 MIPS at 40 MHz by using

the ARM instruction set of the microcontroller, minimizing system power consumption

and improving on the performance of separate memory solutions.

The AT91M40807 microcontroller features an External Bus Interface (EBI), which

enables connection of external memories and application-specific peripherals. The EBI

supports 8- or 16-bit devices and can use two 8-bit devices to emulate a single 16-bit

device. The EBI implements the early read protocol, enabling faster memory accesses

than standard memory interfaces.

Peripherals The AT91M40807 microcontroller integrates several peripherals, which are classified as

system or user peripherals. All on-chip peripherals are 32-bit accessible by the AMBA

Bridge, and can be programmed with a minimum number of instructions. The peripheral

registers.

An on-chip Peripheral Data Controller (PDC) transfers data between the on-chip

USARTs and on- and off-chip memories address space without processor intervention.

Most importantly, the PDC removes the processor interrupt handling overhead, making

it possible to transfer up to 64K contiguous bytes without reprogramming the start

address, thus increasing the performance of the microcontroller, and reducing the power

consumption.

System Peripherals The External Bus Interface (EBI) controls the external memory or peripheral devices via

an 8- or 16-bit data bus and is programmed through the APB. Each chip select line has

its own programming register.

The Power Saving (PS) module implements the Idle mode (ARM7TDMI Core clock

stopped until the next interrupt) and enables the user to adapt the power consumption of

the microcontroller to application requirements (independent peripheral clock control).

The Advanced Interrupt Controller (AIC) controls the internal interrupt sources from the

internal peripherals and the four external interrupt lines (including the FIQ), to provide an

interrupt and/or fast interrupt request to the ARM7TDMI. It integrates an 8-level priority

controller and, using the Auto-vectoring feature, reduces the interrupt latency time.

The Parallel Input/Output Controller (PIO) controls up to 32 I/O lines. It enables the user

to select specific pins for on-chip peripheral input/output functions, and general-purpose

input/output signal pins. The PIO controller can be programmed to detect an interrupt on

a signal change from each line.

6AT91M40807

1371CS–ATARM–02/02

The Watchdog (WD) can be used to prevent system lock-up if the software becomes

trapped in a deadlock.

The Special Function (SF) module integrates the Chip ID, the Reset Status and the Pro-

tect registers.

User Peripherals Two USARTs, independently configurable, enable communication at a high baud rate in

synchronous or asynchronous mode. The format includes start, stop and parity bits and

up to 8 data bits. Each USART also features a Timeout and a Time Guard register, facil-

itating the use of the two dedicated Peripheral Data Controller (PDC) channels.

The 3-channel, 16-bit Timer Counter (TC) is highly programmable and supports capture

or waveform modes. Each TC channel can be programmed to measure or generate dif-

ferent kinds of waves, and can detect and control two input/output signals. The TC has

also 3 external clock signals.

AT91M40807

1371CS–ATARM–02/02

Associated Documentation

The AT91M40807 is a member of the Atmel AT91 16/32-bit Microcontroller family, which is based on the ARM7TDMI pro-

cessor core. Table 2 contains details of associated documentation for further reference.

Table 2. Associated Documentation

Product Information Document Title

AT91M40807

Internal architecture of processor

ARM/Thumb instruction sets

Embedded in-circuit-emulator

ARM7TDMI (Thumb) Datasheet

External memory interface mapping

Peripheral operations

Peripheral user interfaces

AT91x40 Series Datasheet

DC characteristics

Power consumption

Thermal and reliability considerations

AC characteristics

AT91M40807 Electrical Characteristics

Product overview

Ordering information

Packaging information

Soldering profile

AT91M40807 Summary Datasheet (this document)

8AT91M40807

1371CS–ATARM–02/02

Product Overview

Power Supply The AT91M40807 microcontroller has a unique type of power supply pin—VDD. The

VDD pin supplies the I/O pads and the device core. The supported voltage range on

VDD is 1.8V to 3.6V.

Input/Output

Considerations

The AT91M40807 microcontroller accepts voltage levels up to their power supply limit

on the pads.

After the reset, the peripheral I/Os are initialized as inputs to provide the user with maxi-

mum flexibility. It is recommended that in any application phase, the inputs to the

AT91M40807 microcontroller be held at valid logic levels to minimize the power

consumption.

Master Clock The AT91M40807 microcontroller has a fully static design and works on the Master

Clock (MCK) provided on the MCKI pin from an external source.

The Master Clock is also provided as an output of the device on the pin MCKO, which is

multiplexed with a general purpose I/O line. While NRST is active, MCKO remains low.

After the reset, the MCKO is valid and outputs an image of the MCK signal. The PIO

Controller must be programmed to use this pin as standard I/O line.

Reset Reset restores the default states of the user interface registers (defined in the user inter-

face of each peripheral), and forces the ARM7TDMI to perform the next instruction fetch

from address zero. Except for the program counter the ARM7TDMI registers do not

have defined reset states.

NRST Pin NRST is active low-level input. It is asserted asynchronously, but exit from reset is syn-

chronized internally to the MCK. The signal presented on MCKI must be active within

the specification for a minimum of 10 clock cycles up to the rising edge of NRST, to

ensure correct operation.

The first processor fetch occurs 80 clock cycles after the rising edge of NRST.

Watchdog Reset The watchdog can be programmed to generate an internal reset. In this case, the reset

has the same effect as the NRST pin assertion, but the pins BMS and NTRI are not

sampled. Boot mode and Tri-state mode are not updated. If the NRST pin is asserted

and the watchdog triggers the internal reset, the NRST pin has priority.

Emulation Functions

Tri-state Mode The AT91M40807 microcontroller provides a Tri-state mode, which is used for debug

purposes. This enables the connection of an emulator probe to an application board

without having to desolder the device from the target board. In Tri-state mode all the out-

put pin drivers of the AT91M40807 microcontroller are disabled.

To enter Tri-state mode, the pin NTRI must be held low during the last 10 clock cycles

before the rising edge of NRST. For normal operation the pin NTRI must be held high

during reset, by a resistor of up to 400K Ohm.

NTRI is multiplexed with I/O line P21 and USART 1 serial data transmit line TXD1.

Standard RS232 drivers generally contain internal 400K Ohm pull-up resistors. If TXD1

is connected to a device not including this pull-up, the user must ensure that a high level

is tied on NTRI while NRST is asserted.

AT91M40807

1371CS–ATARM–02/02

JTAG/ICE Debug ARM Standard Embedded In Circuit Emulation is supported via the JTAG/ICE port. The

pins TDI, TDO, TCK and TMS are dedicated to this debug function and can be con-

nected to a host computer via the external ICE interface.

In ICE Debug mode, the ARM7TDMI Core responds with a non-JTAG chip ID that iden-

tifies the microcontroller. This is not fully IEEE1149.1 compliant.

Memory Controller The ARM7TDMI microcontroller address space is 4G bytes. The memory controller

decodes the internal 32-bit address bus and defines three address spaces:

•Internal Memories in the four lowest megabytes

•Middle Space reserved for the external devices (memory or peripherals) controlled

by the EBI

•Internal Peripherals in the four highest megabytes

In any of these address spaces, the ARM7TDMI operates in Little-Endian mode only.

Internal Memories The AT91M40807 microcontroller integrates internal static SRAM and ROM. All internal

memories are 32 bits wide and single-clock cycle accessible. Byte (8-bit), half-word (16-

bit) or word (32-bit) accesses are supported and are executed within one cycle. Fetching

Thumb or ARM instructions is supported and internal memory can store twice as many

Thumb instructions as ARM ones.

The 8K-byte primary SRAM bank is mapped at address 0 x 0 (after the remap com-

mand), allowing ARM7TDMI exception vectors between 0 x 0 and 0 x 20 to be modified

by the software. The rest of the bank can be used for stack allocation (to speed up con-

text saving and restoring), or as data and program storage for critical algorithms.

The 128K bytes of internal ROM are mapped at address 0 x 0010 0000. The ROM ver-

sions offer a reduced-cost option of the AT91R40807 for high-volume applications in

which the software is stable.

The AT91R40807 microcontroller integrates an extended SRAM memory bank of 128K

bytes that can be used to validate the code to be stored in the on-chip ROM memory

prior to manufacture of the AT91M40807.

Boot Mode Select The ARM reset vector is at address 0 x 0. After the NRST line is released, the

ARM7TDMI executes the instruction stored at this address. This means that this

address must be mapped in non-volatile memory after the reset.

The input level on the BMS pin during the last 10 clock cycles before the rising edge of

the NRST selects the type of boot memory. The Boot Mode depends on BMS (see

Table 3).

The pin BMS is multiplexed with the I/O line P24 that can be programmed after reset like

any standard PIO line.

Remap Command The ARM vectors (Reset, Abort, Data Abort, Prefetch Abort, Undefined Instruction,

Interrupt and Fast Interrupt) are mapped from address 0 x 0 to address 0 x 20. In order

to allow these vectors to be redefined dynamically by the software, the AT91M40807

microcontroller uses a remap command that enables switching between the boot mem-

Table 3. Boot Mode Select

BMS Boot Memory

1 Internal 32-bit ROM

0 External 16-bit memory on NCS0

10 AT91M40807

1371CS–ATARM–02/02

ory and the internal primary SRAM bank addresses. The remap command is accessible

through the EBI User Interface, by writing one in RCB of EBI_RCR (Remap Control

devices (connected to chip selects 1 to 7) is required. The remap operation can only be

changed back by an internal reset or an NRST assertion.

Abort Control The abort signal providing a Data Abort or a Prefetch Abort exception to the ARM7TDMI

microcontroller is asserted when accessing an undefined address in the EBI address

space.

No abort is generated when reading the internal memory or by accessing the internal

peripherals, whether the address is defined or not.

External Bus Interface The External Bus Interface handles the accesses between addresses 0 x 0040 0000

and 0 x FFC0 0000. It generates the signals that control access to the external devices,

and can be configured from eight 1M-byte banks up to four 16M-byte banks. It supports

byte-, half-word- and word- aligned accesses.

For each of these banks, the user can program:

•Number of wait states

•Number of data float times (wait time after the access is finished to prevent any bus

contention in case the device is too long in releasing the bus)

•Data bus width (8-bit or 16-bit)

•With a 16-bit wide data bus, the user can program the EBI to control one 16-bit

device (Byte Access Select Mode) or two 8-bit devices in parallel that emulate a 16-

bit memory (Byte Write Access Mode).

The External Bus Interface also features the Early Read Protocol, configurable for each

device, that significantly reduces access time requirements on an external device in the

case of single-clock cycle access.

AT91M40807

1371CS–ATARM–02/02

Peripherals The AT91M40807 microcontroller peripherals are connected to the 32-bit wide

Advanced Peripheral Bus. Peripheral registers are only word accessible—byte and half-

word accesses are not supported. If a byte or a half-word access is attempted, the mem-

ory controller automatically masks the lowest address bits and generates a word

access.

Each peripheral has a 16K byte address space allocated (the AIC only has a 4K byte

address space).

Peripheral Registers The following registers are common to all peripherals:

•Control Register—write only register that triggers a command when a one is written

to the corresponding position at the appropriate address. Writing a zero has no

effect.

•Mode Register—read/write register that defines the configuration of the peripheral.

Usually has a value of

0 x 0 after a reset.

•Data Registers—read and/or write register that enables the exchange of data

between the processor and the peripheral.

•Status Register—read only register that returns the status of the peripheral.

•Enable/Disable/Status Registers are shadow command registers. Writing a one in

the Enable Register sets the corresponding bit in the Status Register. Writing a one

in the Disable Register resets the corresponding bit and the result can be read in the

Status Register. Writing a bit to zero has no effect. This register access method

maximizes the efficiency of bit manipulation, and enables modification of a register

with a single non-interruptible instruction, replacing the costly read-modify-write

operation.

Unused bits in the peripheral registers are shown as “—” andmustbewrittenat0for

upward compatibility. These bits read 0.

Peripheral Interrupt Control The Interrupt Control of each peripheral is controlled from the status register using the

interrupt mask. The status register bits are ANDed to their corresponding interrupt mask

bits and the result is then ORed to generate the Interrupt Source signal to the Advanced

Interrupt Controller.

The interrupt mask is read in the Interrupt Mask Register and is modified with the Inter-

rupt Enable Register and the Interrupt Disable Register. The enable/disable/status (or

mask) makes it possible to enable or disable peripheral interrupt sources with a non-

interruptible single instruction. This eliminates the need for interrupt masking at the AIC

or Core level in real-time and multi-tasking systems.

Peripheral Data Controller The AT91M40807 microcontroller has a 4-channel Peripheral Data Controller (PDC)

dedicated to the two on-chip USARTs. One PDC channel is dedicated to the receiver

and one to the transmitter of each USART.

The user interface of a PDC channel is integrated in the memory space of each USART.

It contains a 32-bit Address Pointer Register (RPR or TPR) and a 16-bit Transfer

Counter Register (RCR or TCR). When the programmed number of transfers are per-

formed, a status bit indicating the end of transfer is set in the USART Status Register

and an interrupt can be generated.

12 AT91M40807

1371CS–ATARM–02/02

System Peripherals

PS: Power-saving The power-saving feature of the AT91M40807 microcontroller optimizes power con-

sumption, enabling the software to stop the ARM7TDMI clock (idle mode) and restarting

it when the module receives an interrupt (or reset). It also enables on-chip peripheral

clocks to be enabled and disabled individually, matching power consumption and appli-

cation need.

AIC: Advanced Interrupt

Controller

The Advanced Interrupt Controller has an 8-level priority, individually maskable, vec-

tored interrupt controller, and drives the NIRQ and NFIQ pins of the ARM7TDMI from:

•The external fast interrupt line (FIQ)

•The three external interrupt request lines (IRQ0-IRQ2)

•The interrupt signals from the on-chip peripherals

The AIC is largely programmable, offering maximum flexibility, and its vectoring features

reduce the real-time overhead in handling interrupts.

The AIC also features a spurious vector, which reduces spurious interrupt handling to a

minimum, and a protect mode that facilitates the debug capabilities.

PIO: Parallel I/O Controller The AT91M40807 microcontroller has 32 programmable I/O lines. Six pins are dedi-

cated as general-purpose I/O pins. Other I/O lines are multiplexed with an external

signal of a peripheral to optimize the use of available package pins. The PIO controller

enables generation of an interrupt on input change and insertion of a simple input glitch

filter on any of the PIO pins.

WD: Watchdog The Watchdog is built around a 16-bit counter, and is used to prevent system lock-up if

the software becomes trapped in a deadlock. It can generate an internal reset or inter-

rupt, or assert an active level on the dedicated pin NWDOVF. All programming registers

are password-protected to prevent unintentional programming.

SF: Special Function The AT91M40807 microcontroller provides registers that implement the following spe-

cial functions.

•Chip Identification

•RESET Status

•Protect Mode

AT91M40807

1371CS–ATARM–02/02

User Peripherals

USART: Universal

Synchronous/

Asynchronous Receiver

Transmitter

The AT91M40807 microcontroller provides two identical, full-duplex, universal synchro-

nous/asynchronous receiver/transmitters.

Each USART has its own baud rate generator, and two dedicated Peripheral Data Con-

troller channels. The data format includes a start bit, up to 8 data bits, an optional

programmable parity bit and up to 2 stop bits.

The USART also features a Receiver Timeout register, facilitating variable length Frame

support when it is working with the PDC, and a Time Guard register, used when interfac-

ing with slow remote equipment.

TC: Timer Counter The AT91M40807 microcontroller features a Timer Counter block that includes three

identical 16-bit timer counter channels. Each channel can be independently pro-

grammed to perform a wide range of functions, including frequency measurement, event

counting, interval measurement, pulse generation, delay timing and pulse-width

modulation.

The Timer Counter can be used in Capture or Waveform mode, and all three counter

channels can be started simultaneously and chained together.

14 AT91M40807

1371CS–ATARM–02/02

Ordering Information

Table 4. Ordering Information

Ordering Code Package Operation Range

AT91M40807-33AI TQFP 100 Industrial

(-40°Cto85°C)

AT91M40807

1371CS–ATARM–02/02

Packaging Information

Figure 3. 100-lead Thin (1.4 mm) Quad Flat Pack Package Drawing

PIN 1

aaa

bbb

ddd

θ2

θ3

R1 R2 0.25

ccc

θ1

16 AT91M40807

1371CS–ATARM–02/02

Table 5. Common Dimensions (mm)

Symbol Min Nom Max

c0.09 0.2

c1 0.09 0.16

L 0.45 0.6 0.75

L1 1.00 REF

R2 0.08 0.2

R1 0.08

S0.2

q0°3.5°7°

θ10°

θ2 11°12°13°

θ3 11°12°13°

A1.6

A1 0.05 0.15

A2 1.35 1.4 1.45

Tolerances of form and position

aaa 0.2

bbb 0.2

Table 6. Lead Count Dimensions (mm)

Count

D/E

BSC

D1/E1

BSC

bb1

e BSC ccc dddMin Nom Max Min Nom Max

100 16.0 14.0 0.17 0.22 0.27 0.17 0.2 0.23 0.50 0.10 0.06

Table 7. Device and 100-lead TQFP Package Maximum Weight

712 mg

AT91M40807

1371CS–ATARM–02/02

Soldering Profile Table 8 gives the recommended soldering profile from J-STD-20.

Small packages may be subject to higher temperatures if they are reflowed in boards

with larger components. In this case, small packages may have to withstand tempera-

turesofupto235°C, not 220°C (IR reflow).

Recommended package reflow conditions depend on package thickness and volume.

See Table 9.

When certain small thin packages are used on boards without larger packages, these

small packages may be classified at 220°C instead of 235°C.

Notes: 1. The packages are qualified by Atmel by using IR reflow conditions, not convection or

VPR.

2. By default, the package level 1 is qualified at 220°C (unless 235°C is stipulated).

3. The body temperature is the most important parameter but other profile parameters

such as total exposure time to hot temperature or heating rate may also influence

component reliability.

A maximum of three reflow passes is allowed per component.

Table 8. Soldering Profile

Convection or

IR/Convection VPR

Average Ramp-up Rate (183°C to Peak) 3°C/sec. max. 10°C/sec.

Preheat Temperature 125°C±25°C 120 sec. max

Temperature Maintained Above 183°C 60sec.to150sec.

Time within 5°C of Actual Peak Temperature 10 sec. to 20 sec. 60 sec.

Peak Temperature Range 220 +5/-0°Cor

235 +5/-0°C

215 to 219°Cor

235 +5/-0°C

Ramp-down Rate 6°C/sec. 10°C/sec.

Time 25°C to Peak Temperature 6 min. max

Table 9. Recommended Package Reflow Conditions

Parameter Temperature

Convection 235 +5/-0°C

VPR 235 +5/-0°C

IR/Convection 235 +5/-0°C

18 AT91M40807

1371CS–ATARM–02/02

Document Details

Title AT91M40807 Summary

Literature Number 1371S

Revision History

Version A Publication Date: Jun-00

Version B Publication Date: Jul-00

Version C Publication Date: 21-Jan-02

Revisions Since Previous Version

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Reformatted

Page: 9

Added information to section Internal Memories

Page: 14

Change in Table 4

Page: 16

Added Table 7

Page: 17

Added section Soldering Profile

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