BCM8422 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – 4-CHANNEL 1/2/4G FIBRE CHANNEL INTELLIGENT LOOP CIRCUIT/ DUAL RETIMER/REPEATER WITH EYEOPENER-R

OVERVIEW
I1
CDR
O1
Active SI
Active LI
O2
CDR
I2
I0
CDR
O0
PBert
O3
CDR
I3
PLL
Logic Control
Power
Fref (106.25 MHz)
2-Wire Serial Interface
1.2v 3.3v
The BCM8422 is an intelligent back end Fibre Channel loop
circuit that facilitates the implementation of an IBOD (Intelligent
Bunch of Disks) on Fibre Channel Storage Array Systems. The
BCM8422 can also be configured as a dual Retimer/Repeater
with EyeOpener^® device designed to drive optical and copper
ports in Fibre Channel applications.
Each port of the BCM8422 can be independently configured as a
retimer or repeater operating at the Fibre Channel data rates of
1.0625 Gbps, 2.125 Gbps, and 4.25 Gbps. With an on-chip low-
jitter phase-locked loop (PLL), the BCM8422 exceeds Fibre
Channel signal quality specifications.
The BCM8422 features Active Signal Integrity (Active-SI),
which allows monitoring of the received signal at each high-
speed port to determine signal eye quality and bit error rate (BER)
for system diagnostics, fault isolation, optics aging, and
maintenance. An on-chip pattern generator/checker is provided
with internal loopback capability on each I/O port.
The BCM8422 also features Active Link Integrity (Active- LI),
which is a set of advance link integrity functions performing data
generation and checking on transmitted Fibre Channel data. The
combination of Active-SI and Active-LI improves storage
system’s Reliability, Availability, and Serviceability (RAS) with
the ability to monitor and diagnose system integrity.
Data from each port can be optionally retimed utilizing an elastic
FIFO and local crystal reference clock eliminating jitter transfer.
The BCM8422 can also be configured to operate in repeater
mode for low latency.
The BCM8422 is available in a 13 mm x 13 mm BGA package.
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8422-PB00-R
02/17/04
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