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參數(shù)資料
| 型號(hào)： | PM8353 |
| 廠商： | PMC-Sierra, Inc. |
| 英文描述： | 4-Channel 1.0-1.25 Gbps Transceiver |
| 中文描述： | 4通道1.0-1.25 Gbps的收發(fā)器 |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 122K |
| 代理商： | PM8353 |
PMC-Sierra,Inc.
4-Channel 1.0-1.25 Gbps Transceiver
PMC-2000673 (R3)
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS
’
INTERNAL USE
Copyright PMC
-
Sierra, Inc. 2001
PM8353 QuadPHY
FEATURES
Four independent 1.0-1.25 Gbit/s
transceivers
Four secondary channels to support
channel redundancy
Ultra low power operation: 1.25 Watt
typical
Integrated serializer/deserializer, clock
synthesis, clock recovery, and 8B/10B
encode/decode logic
Physical Coding Sublayer (PCS) logic
for Gigabit Ethernet
Selectable 8-bit, 10-bit, or IEEE 802.3z
GMII parallel interface
Optional Receive FIFOs which
synchronize incoming data to local
clock domain
“Trunking” feature to de-skew and
align received parallel data across four
channels
100-156 MHz Single Data Rate (SDR)
parallel transmit interface with clock
forwarding
100-125 MHz SDR parallel receive
interface
Extensive control of loopback, BIST,
and operating modes via 802.3
compliant MDC/MDIO serial interface
Built-in packet generator/checker
IEEE 1149.1 JTAG testing support
IEEE 802.3z Gigabit Ethernet and
ANSI X3T11 Fibre Channel support
High speed outputs which feature
programmable output current to
directly drive dual-terminated line
2.5V, 0.25 micron CMOS technology
with 3.3V tolerant I/O
Direct interface to optical modules,
coax, or serial backplanes
Small footprint 19x19 mm, 289-pin
PBGA
APPLICATIONS
High speed serial backplanes
Gigabit Ethernet links
Fibre Channel links
Intra-system interconnect
ASIC to PMD link
GENERAL DESCRIPTION
The QuadPHY
TM
is a Quad PHYsical
layer transceiver ideal for systems
requiring large numbers of point-to-point
gigabit links. It provides four individual
serial channels capable of operation at
up to 1.25 Gbps each, which may be
grouped together to form a single 5.0
Gbps bidirectional link. Each of the four
primary channels has a corresponding
secondary channel that can be enabled
via the MDC/MDIO serial interface.
The QuadPHY includes 8B/10B block
coding logic (compliant with 802.3z
Gigabit Ethernet and Fibre Channel
requirements) which produces run length
limited data streams for serial trans-
mission.
A receive FIFO optionally aligns all
incoming parallel data to the local clock
domain, adding or removing IDLE
sequences as required. This simplifies
implementation of the upstream ASIC by
removing the requirement to deal with
multiple clock domains.
When trunking is enabled, the QuadPHY
can remove cable skew differences
equivalent to several meters, presenting
4-byte data vectors at the receive
interface exactly as they were trans-
mitted.
EXAMPLE ARCHITECTURE
The first figure on the next page shows
the QuadPHY in a switch application.
This implementation uses four channels
of 1.25 Gbaud per linecard, requiring
only 16 signal pins per linecard and 64
for the switch card, providing up to
16 Gbps total payload capacity to the
switch fabric.
The dotted lines in the figure depict the
system clock domains. Note that even
though the recovered clock from any or
all serial links may be asynchronous to
the local clock, the QuadPHY bridges-
these domains so that the switch fabric
and linecards may be designed in only a
single clock domain.
BLOCK DIAGRAM
FIFO
8B/10B
Encoder
10B/8B
Decoder
Clock
Recovery
Clock Synthesizer
Common Control Logic
REFCLK
PLL LOCK
MDC/MDIO
Serial
Management
Static Controls
Serial
Receive
Data
Serial
Transmit
Data
10
10
Parallel
Data In
TX Byte
Clock
Transmit Channel A (1 of 4)
Receive Channel A (1 of 4)
Parallel
Data Out
RX Byte
Clock
Serializer
PCS
PCS
Deserialize &
Byte Align
FIFO
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