Intel 21555 Benutzerhandbuch

21555 PCI-to-PCI Bridge Evaluation Board User’s Guide

Introduction

1.5

Stake-Pin Jumper

shows the configuration and the function of the single stake-pin jumper. J8 enables the

DE1B55503 hot-swap functionality, controls operation of LED L1, and connects the l_stat signal
to a pullup resistor.

Table 1. DIP Switch Operation

Switch
Pack

Switch

The Switch Controls

Reference Information

SW1, 2, 3

PICMG configurations. (See

Chapter 3

Table 10 on page 21

SW4 PR_AD1

strapping

option.

21555 Non Transparent
PCI-to-PCI Bridge User’s
Manual

SW5

PR_CS to either Flash or optional ROM socket.

Table 8 on page 19

J20

SW1

PR_AD2 for SROM operation.

Table 7 on page 18

SW2

PR-AD3 for lockout bit control.

SW3

PR_AD4 for synchronous or asynchronous clocking.

Table 14 on page 22

SW4

PR_AD5 for S_CLKO operation.

SW5

PR_AD6 for Central function selection.

Table 12 on page 22

J21

SW#
(1,2,3,4,5)

The REQ/GNT lines for Arbiter control.

Table 12 on page 22

Table 13 on page 22

Table 2. Stake-Pin Jumper

Jumper

Function

•

When removed, the hot-swap functionality is enabled, and L1 will light.

•

When installed, hot-swap functionality is disabled and the L1 LED is
extinguished.

No jumper is installed by the Factory default.