PMC-Sierra,Inc.
PM7350
S/UNI-DUPLEX
Dual Serial Link, PHY Multiplexer
FEATURES
鈥?Integrated analog/digital device that
interfaces a UTOPIA L2 bus to a serial
backplane with optional 1:1 protection
using high speed Low Voltage
Differential Signal (LVDS) serial links.
鈥?For framers or modems without
UTOPIA bus interfaces: optionally
provides cell delineation (I.432) across
16 clock and data (bit serial)
interfaces.
鈥?Interworks with PM7351
S/UNI-VORTEX devices to implement
a point-to-multipoint serial backplane
architecture, with optional 1:1
protection of the common card.
鈥?Interfaces to another S/UNI-DUPLEX
device (via a single LVDS link) to
create a simple point-to-point 鈥淯TOPIA
bus extension鈥?capability.
鈥?Interfaces to two S/UNI-DUPLEX
devices to create a 1:1 protected bus
extension.
鈥?Requires no external memory devices.
鈥?Low power 3.3V CMOS technology.
鈥?Standard 5 pin P1149 JTAG port.
鈥?160 ball PBGA, 15mm x 15mm.
鈥?In the LVDS receive direction: selects
traffic from the LVDS link marked
active and demultiplexes the individual
cell streams to the appropriate PHY
device.
鈥?In the LVDS transmit direction: accepts
52-56 byte cell streams from up to 32
UTOPIA L2 compatible PHY devices,
multiplexing into a single cell stream
carried over two high speed LVDS
serial interfaces.
鈥?Cell read/write to both LVDS links
available through the processor port.
Provides optional hardware assisted
CRC32 calculation across cells to
support an embedded inter-processor
communication channel across the
LVDS links.
鈥?8/16 bit, 52 MHz extended UTOPIA L2
bus slave (compatible with PM7351
S/UNI-VORTEX).
鈥?16 port, 4 pin clocked serial data
interface (Tx & Rx), with integrated
I.432 ATM cell delineation.
LVDS INTERFACES
鈥?Dual 4 wire LVDS serial transceivers
each operating at up to 200 Mb/s.
鈥?Operates across PCB or backplane
traces, or across up to 10 meters of 4
wire twisted pair cabling for inter-shelf
communications.
鈥?Fully integrated LVDS clock synthesis
and recovery. No external analog
components are required.
鈥?Usable bandwidth (excludes system
overhead) of 186 Mb/s.
PHY/FRAMER INTERFACES
One of three modes can be selected:
鈥?8/16 bit, 33 MHz UTOPIA L2 bus
master (also supports expanded length
cells).
LVDS TRANSMIT DIRECTION
鈥?Simple round-robin multiplex of up to
32 PHYs (or 16 clock/data interfaces)
plus the microprocessor port鈥檚 cell
transfer buffer.
鈥?Multiplexed cell stream broadcast to
both LVDS simultaneously.
IBUS8
IANYPHY
IMASTER
IENB
IADDR[4:0]
IAVALID
IDAT[15:0]
IPRTY
ISOC
ISX
IFCLK
ICA
LRXD[15:0]
LRXC[15:0]
SCI-PHY
Receive
Master/
Transmit
Slave
Per-PHY
Buffers
RSTOB
RCLK
RX8K
TX8K
BLOCK DIAGRAM
TXD1+
TXD1-
RXD1+
Cell Processor
RXD1-
TXD2+
Elastic Store
LTXD[15:0]
LTXC[15:0]
OBUS8
OANYPHY
OMASTER
OENB
OADDR[4:0]
OAVALID
ODAT[15:0]
OPRTY
OSOC
OSX
OFCLK
OCA
SCIANY
Time-Sliced ATM
Transmission
Convergence
TXD2-
Per-PHY
Buffers
RXD2+
RXD2-
2 Cell
Buffer
4 Cell
FIFO
SCI-PHY
Transmit
Master/
Receive Slave
Clock
Synthesis
4 Cell
FIFO
Microprocessor Interface
JTAG Test Access
Port
TMS
TCK
REFCLK
TRSTB
TDO
CSB
ALE
RDB
D[7:0]
RSTB
A[8:0]
WRB
INTB
TDI
PMC-990147 (P2)
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC. AND FOR ITS CUSTOMERS鈥?INTERNAL USE
漏
1999 PMC-Sierra, Inc.
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