PEB20321 Просмотр технического описания (PDF) - Siemens AG

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PEB20321

Multichannel Network Interface Controller for HDLC MUNICH32X

Siemens AG 

PEB 20321

Introduction

Table 1

PCI Bus Interface Pins (cont’d)

Pin No. Pin No. Symbol

P-MQFP- P-TQFP-

160-1

176-1

136

150

RST

40

42

INTA

I/O Function

I

Reset

An asynchronous active low RST signal

brings all PCI registers, sequencers and

signals into a consistent state. All PCI

output signals are driven to their benign

state.

During RESET all output and I/O pins are in

tristate condition with the following

exception:

TXDEN is active high during RESET.

O (oD) Interrupt Request

When an interrupt status is active and

unmasked, the MUNICH32X activates this

open-drain output. Examples of interrupt

sources are transmission/reception error,

completion of transmit or receive packets

etc. The MUNICH32X deactivates INTA

when the interrupt status is acknowledged

via an appropriate action (e.g., specific

register write) and no other unmasked

interrupt statuses are active.

INTA is activated/ deactivated

asynchronous to the CLK.

Note: PCI control signals always require pull-up resistors. For the system dependent

pull-up recommendation please refer to PCI Specification Revision 2.1

chapter 4.3.3.

.

Semiconductor Group

20

1998-08-01

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