PM8379 Datasheet PDF - PMC-Sierra
| Part Number | PM8379 | |
| Description | 20-Port 4.25 Gbit/s FC-AL Cut-Through Switch | |
| Manufacturers | PMC-Sierra | |
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20-Port 4.25 Gbit/s FC-AL Cut-Through Switch
PM8379
CTS 20x4G
Advance
The CTS 20x4G is designed to interface
directly to Fibre Channel disk drives in a
storage array. It can interface directly to
wwwo.dpattiacsshoerett4ouc.caobmles at the ingress/egress
point of an enclosure and is able to
determine if an incoming frame is
destined for a drive within that enclosure.
After determining which port is
associated with the frames recipient, a
cut through operation to that port is
performed thereby significantly reducing
system latency and improving perfor-
mance.
The CTS 20x4G provides unique disk
isolation features that significantly
increase total system availability,
reliability, and serviceability.
FEATURES
GENERAL
• 20 independent rate selectable 1.0625,
2.125 or 4.25 Gbit/s physical
interfaces.
• Register and software compatible to
the PM8368 PBC 18x2G, PM8369
PBC 18x4G, PM8372 PBC 4x2G and
PM8377 PBC 4x4G.
• Compliant to FC jitter specifications on
a per-port basis.
• Supports single-ended or differential
106.25 MHz reference clock.
• Per port monitoring and diagnostics:
• LPSM Monitoring on each port.
• Disk isolation and per port serial
loopback.
• Configurable Digital Loss of Link:
analog LOS Detect, 8B/10B
disparity errors/error rate, CRC
errors/error rate, word
synchronization error/error rate, and
compliant frequency of comma
patterns detected (configurable
thresholds for each with
corresponding pin interrupts).
• Built-in self test capability with FC
Frame Generator/Comparator.
• Supports a 106.25 MHz, 40-bit (20
receive + 20 transmit) DDR parallel
interface that acts as a 21st port. This
flexible interface enables external
functions such as enclosure
management or other user-proprietary
functions to be implemented using a
low cost FPGA.
CUT-THROUGH SWITCHING
• Integrated cut-through switching and
arbitration management enables up to
200% improvement in EDR and IOPS.
• Parallel arbitration supported with
arbitration priority and access fairness
preserved.
• Automatic or CPU controlled
initialization of AL_PA table.
• Supports dynamic half duplex, half/full
duplex operation, LPSM transfer state,
multicast/broadcast (OPNy).
BLOCK DIAGRAM
Arb
Mgmt
Cut Thru
Mgmt
CTS Logic
AL_PA
Table
RDIN[0]
RDIP[0]
RDIN[1]
RDIP[1]
RDIN[19]
RDIP[19]
RXCLK
RXD[19:0]
Frame Generator
RX FIFO
RX FIFO
RX FIFO
RX FIFO
JTAG
CDRU
Frame Comparator
TX FIFO
TX FIFO
TX FIFO
CPU CONTROL
TDON[0]
TDOP[0]
TDON[1]
TDOP[1]
TDON[19]
TDOP[19]
TXD[19:0]
TXCLK
PMC-2031144
Issue 2
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC.,
AND FOR ITS CUSTOMERS’ INTERNAL USE
© Copyright PMC-Sierra, Inc. 2004.
All rights reserved.
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for PM8379 electronic component. |
| Information | Total 2 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ PM8379.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| PM8372 | The function is 4-Port FC/GE Retimer and FC-AL Port Bypass Controller. PMC-Sierra | |
| PM8379 | The function is 20-Port 4.25 Gbit/s FC-AL Cut-Through Switch. PMC-Sierra | |
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