Owner manual

VM162/VM172Chapter 2 Functional Description

Juli 23, 1997 Page 2- 15© PEP Modular Computers

2.6.2.2 External Autovectored Interrupt Requests

Autovectored interrupts are all generated via the 68EN360 pins for external interrupt sources. They are

summarized in the table below. Care must be taken that the relevant 68EN360 register is initialised with

respect to the wiring (see also the Programming chapter in this manual).

Table 2.8: External Autovectored Interrupts

2.6.2.3 VME Interrupt Mask Register

The VME Interrupt Mask Register is a one byte wide register with read/write access situated at default

address CD 00 00 01 (HEX). All bits are cleared after reset.

Note: The ﬁrmware of the board initializes this register using the default parameters stored in the EE-

PROM.

Source 68EN360 Pin Autovector

ABORT/ACFAIL IRQ7 7

TICK IRQ6 6

Mailbox IRQ IRQ5 5

SYSFAIL IRQ3 3

Name Value Description

EN_IRQ7

EN_IRQ6

EN_IRQ5

EN_IRQ4

EN_IRQ3

EN_IRQ2

EN_IRQ1

SYSFAIL

Enable VME IRQ7

Enable VME IRQ6

Enable VME IRQ5

Enable VME IRQ4

Enable VME IRQ3

Enable VME IRQ2

Enable VME IRQ1

Enable VME SYSFAIL IRQ

ReservedEN_IRQ3 Reserved SYSFAIL

CS7 + $1

01234567

EN_IRQ7 EN_IRQ4EN_IRQ5EN_IRQ6