PEB20321 datasheet(28/366 Pages) INFINEON

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PEB 20321

PEF 20321

Overview

Data Sheet

2001-02-14

9STOP

s/t/s

STOP

STOP is used by a slave to request the

current master to stop the current bus

transaction.

When MUNICH32X is Master, STOP is

an input.

When MUNICH32X is Slave, STOP is an

output.

STOP is updated and sampled on the

rising edge of CLK.

151

IDSEL

Initialization Device Select

When MUNICH32X is slave in a

transaction, if IDSEL is active in the

address phase and C/BE(3:0) indicates

an I/O read or write, the MUNICH32X

assumes a read or write to a

configuration register. In response, the

MUNICH32X asserts DEVSEL during the

subsequent CLK cycle.

IDSEL is sampled on the rising edge of

CLK.

DEVSEL

s/t/s

Device Select

When activated by a slave, it indicates to

the current bus master that the slave has

decoded its address as the target of the

current transaction. If no bus slave

activates DEVSEL within six bus CLK

cycles, the master should abort the

transaction.

When MUNICH32X is master, DEVSEL

is input. If DEVSEL is not activated within

six clock cycles after an address is output

on AD(31:0), the MUNICH32X aborts the

transaction and generates an INTA.

When MUNICH32X is slave, DEVSEL is

output.

Table 1

PCI Bus Interface Pins (cont’d)

Pin No.

Symbol

I/O

Function

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