Kontron VM162 User Manual

Page 39

VM162/VM172

Chapter 2 Functional Description

Juli 23, 1997

Page 2- 17

Register Description

Name

Value

Access

Description

WDG
bit 7

BERR2
bit 6

BERR1
bit 5

EN_WDG
bit 4

TR_WDG
bit 3

EN_BERR1
bit 2

ACFAIL
bit 1

LED_G
bit 0

Read/Write

Set by watchdog timer when timeout has been reached.
Used to differentiate between resets caused by the
watchdog and resets caused by the reset button (power up
resets can be identified within the 68EN360).

Set by VMEbus BUS monitor when timeout has been
reached. Used to identify BERR caused by this timer (see
also VMEbus Control/Status Register).

Set by on-board bus error timer when timeout has been
reached. Used to identify BERR caused by this timer.

Enable the watchdog timer. It can only be set once, and
remains enabled until the next reset.

Triggers the watchdog timer. Watchdog timeout=512ms.

Enables the on-board bus error timer. It also monitors all
on-board I/O cycles, including the time from the VMEbus
request to the VMEbus grant. Timeout=8

VME ACFAIL signal latched when active in order to
distinguish between a level 7 NMI from an ABORT or
ACFAIL.

Enables the green ‘general purpose’ front panel LED.

This manual is related to the following products:

VM172