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Fat Pipe Switch Module: GbE Fat Pipe Switch Module
10007175-02 KAT4000 User’s Manual
5-5
Components and Features
The following is a summary of the GbE fat pipe switch module hardware components and
features:
VSC7376, HawX-G26 GbE Switch:
The Vitesse VSC7376 GbE switch is a multilayer switch with 26 tri-speed (10/100/1000
Mbps) SGMII Ethernet ports and integrated 1000Base-BX (SerDes) interfaces. It is located
from FC16,0000-FC17,FFFF. This type of switch is also used on the KAT4000 board. For
more information about the VSC7376, see “Ethernet Core Switch (optional)” on page 4-2.
The default fat pipe switch is not configured. To configure the switch, see the KAT4000
Quick Start Guide, #10008585-xx.
PLD: The PLD is the interface between the local bus and the VSC7376 parallel interface. It con-
tains registers for fat pipe module control. For more information, see “GbE Fat Pipe Switch
Module PLD.”
I
2
C SROM EEPROM: The 64 Kb EEPROM is used to store VSC7376 configuration information.
Flash: (Available only with the no-CPU KAT4000 board.) The 4 Mb asynchronous flash is used to
store firmware on the VSC7376 switch.
SRAM Memory: (Available only with the no-CPU KAT4000 board.) The 256 Kb asynchronous SRAM is used
by the on-board VSC7376 firmware.
JTAG: Resistors allow the JTAG to bypass the switch. See
Fig. 5-6 for details.
Figure 5-6: GbE Fat Pipe Switch JTAG
LEDs: CR2-4 (green) and CR5 (red) on the bottom side of the board are generic LEDs for use by
the firmware.
High-Speed Connectors:
PLD
VSC7376
Ethernet
Switch
TMS, TCK
PLD_TDI
PLD_TDO_R PLD_TDO
VSC7376_TDO_R VSC7376_TDO