Datasheet > PM8379

PM8379

更新时间： 2024-01-30 17:05:10

品牌	Logo	应用领域
PMC		/
页数	文件大小	规格书
2页	57K
描述
20-Port 4.25 Gbit/s FC-AL Cut-Through Switch

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PM8379 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	compliant	风险等级：	5.7
Base Number Matches：	1

PM8379 数据手册

PM8379

CTS 20x4G

Advance

20-Port 4.25 Gbit/s FC-AL Cut-Through Switch

• 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.

The CTS 20x4G is designed to interface

directly to Fibre Channel disk drives in a

storage array. It can interface directly to

optics or to cables 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.

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).

The CTS 20x4G provides unique disk

isolation features that significantly

increase total system availability,

reliability, and serviceability.

FEATURES

BLOCK DIAGRAM

GENERAL

CTS Logic

• 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.

Arb

Mgmt

Cut Thru

Mgmt

AL_PA

Table

• 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:

Frame Generator

Frame Comparator

•

LPSM Monitoring on each port.

RDIN[0]

RDIP[0]

RX FIFO

TX FIFO

TDON[0]

TDOP[0]

•

Disk isolation and per port serial

loopback.

RDIN[1]

RDIP[1]

TDON[1]

TDOP[1]

•

Configurable Digital Loss of Link:

analog LOS Detect, 8B/10B

disparity errors/error rate, CRC

errors/error rate, word

RDIN[19]

RDIP[19]

TDON[19]

TDOP[19]

RX FIFO

TX FIFO

synchronization error/error rate, and

compliant frequency of comma

patterns detected (configurable

thresholds for each with

RXCLK

TXD[19:0]

TXCLK

RXD[19:0]

JTAG

CDRU

CPU

CONTROL

corresponding pin interrupts).

PMC-2031144

Issue 2

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC.,

AND FOR ITS CUSTOMERS’ INTERNAL USE

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