NOV2124 PRODUCT BRIEF
NOV2124TM
Quad PORT ATM/POS 155 Mb/s PHYSICAL LAYER IC
1. GENERAL DESCRIPTION
The NOV2124 is an integrated circuit
that implements four-channel
ATM/Packet Over SONET/SDH
(POS) processing functions at 155.52
Mb/s. The part contains both the PMD
and the TC sublayers and has
UTOPIA Level 2 interface to the ATM
layer or optionally POS interface to
the link layer. The device also
includes dedicated serial ports for the
insertion and extraction of the DCC
overhead bytes.
The NOV2124 is fully compliant with
the SONET/SDH, B-ISDN ATM Forum
User Network Interface requirements
and standards, and compliant with
PPP protocol over SONET/SDH (RFC
1619/1662 of the IETF). The PMD
sublayer is based on Novanet
Semiconductor’s Hi-PHY
technology for high-speed data and
clock recovery. The UTOPIA Level
2/POS interfaces provide variable
modes of operation when interfacing
the ATM layer or link layer in order to
facilitate the connection of the
NOV2124 to different ATM layer or
Packet Over SONET/SDH link layer
devices.
The NOV2124 is targeted primarily for
use within ATM switches, routers and
WAN switches supporting Packet
Over SONET/SDH. The device is
manufactured using 0.35µ CMOS
technology and packaged in a 256 pin
PBGA package.
For additional information please contact
our customer support by e-mail:
info@novanetsemi.com or by phone
(+972-9-746-4411) or fax (+972-9-746-
4422).
PRODUCT FEATURES INCLUDE
q Processes 155.52 Mb/s STS-
3c/STM-1 data stream
q Interfaces to optical fiber
transceivers
q Provides UTOPIA Level 2 interface
q Provides POS interface
q On-chip clock and data recovery
and clock synthesis
q 3.3 Volt, 0.35u CMOS technology
APPLICATIONS
q Switches
q Routers
q ATM/Packet Over SONET/SDH
Interfaces
NOV2124 PRODUCT BRIEF
2. BLOCK DIAGRAM
This block diagram illustrates the functional blocks of the NOV2124
device. Each port consists of the following blocks:
Hi-PHY™ - Implements the physical interface to the optical
transceiver and the serial to parallel and parallel to serial function.
Framer - Implements the SONET/SDH frame processing.
ATM Processor - Implements cell processing functions such as cell
delineation, HEC verification and calculation etc.
POS Processor - Implements packet processing functions such as
flag detection and generation, FCS verification and calculation etc.
FIFO - The memory cells where the cells/packets data is stored
before processing (transmit path) and after processing (receive path).
UTOPIA - Implements the interface functions between the PHY and
the ATM layer (ATM mode).
POS Interface - Implements the interface functions between the PHY
and the Link layer (POS mode).
Clock
Synthesis
Data &
Clock
Recovery
Serial to
Parallel
Parallel to
Serial
Tx
SONET/
SDH
Framer
Rx
SONET/
SDH
Framer
Tx
Overhead
Processor
Rx
Overhead
Processor
Tx ATM
Cell
Processor
Rx ATM
Cell
Processor
Tx POS
Processor
Rx POS
Processor
PORT 1
PORT 2
PORT 3
Hi-PHY
UTOPIA
Level 2/
POS
Interface
PORT 0
LPF1
LPF2
RefCLK-
RefCLK+
RxD0-
RxD0+
TxD0-
RxD3+/-
TxD3+/-
TxD0+
RxD2+/-
TxD2+/-
RxD1+/-
TxD1+/-
LDCC
Microprocessor
Interface
D[7:0]
A[5:0]
*CS
W/*R
*DSTB
*INTR
JTAG
Interface
TDO
TDI
TCK
TMS
*TRST
TSDCC 1-4
TSDCK 1-4
TLDCC 1-4
TLDCK 1-4
RSDCC 1-4
RSDCK 1-4
RLDCC 1-4
RLDCC 1-4
Sec./Line DCC i/f ASSI
ASCLK
*ASSTB
ASDO
Rx_EOP
TxData[15:0]
TxAdd[4:0]
TxSOC/P[3:0]
*TxEnb[3:0]
TxClav/PTPAx4
TxPrty
Tx_ERR
RxData[15:0]
RxAdd[4:0]
RxSOC/P[3:0]
*RxEnb[3:0]
RxClav/PRPAx4
RxPrty
RxCLK
Tx_STPA
TxCLK
Tx_EOP
Tx_MOD
Rx_RVAL
Rx_ERR
Rx_MOD
FIFO
FIFO
FIFO
FIFO
NOV2124 PRODUCT BRIEF
3. TYPICAL APPLICATION
The figure below demonstrates
connection of a NOV2124
device to one 4-port ATM Layer
Device according to UTOPIA
Level 2. Connection is
performed using the Direct
Status Indication mode, in
which a dedicated RxClav and
TxClav provide direct indication
of the status of the FIFO's of
each port. Cell transmission is
made to/from one PHY port at a
time. Receive and transmit
channels work simultaneously
and independently. This mode
supports 16-bit data bus width
TxData[15:0]
TxAdd[4:0]
TxSOC
*TxEnb
TxClav[3:0]
TxPrty
TxCLK
RxData[15:0]
RxAdd[4:0]
RxSOC
*RxEnb
RxClav[3:0]
RxPrty
RxCLK
NOV2124
RxD0+/-
TxD0+/-
4-PORT
ATM LAYER
DEVICE
Optical
Transceiver
RxD1+/-
TxD1+/-
Optical
Transceiver
RxD2+/-
TxD2+/-
Optical
Transceiver
RxD3+/-
TxD3+/-
Optical
Transceiver
