Xycom XVME-500, Manual

Page: 77 / 104

XVME-500/590 Manual
February, 1988
Table B-l. VMEbus Signal Identification (cont’d)
Signal
Mnemonic
Connector
and
Pin Number Signal Name and Description
SYSFAIL* 1C:lO
SYSTEM FAIL: Open-collector driven signal that
indicates that a failure has occurred in the system. It
may be generated by any module on the VMEbus.
SYSRESET* lC:12 SYSTEM RESET: Open-collector driven signal which,
when low, will cause the system to be reset.
WRITE*
lA:14 WRITE: Three-state driven signal that specifies the
data transfer cycle in progress to be either read or
written.
A high level indicates a read operation, a low
level indicates a write operation.
+5V STDBY lB:31 +5 VDC STANDBY: This line supplies +5 VDC to devices
requiring battery backup.
+5v lA:32
1 B:32
1
C:32
2B:1,13,32
+5 VDC POWER: Used by system logic circuits.
+12v
-12v
lC:31 +I2 VDC POWER: Used by system logic circuits.
lA:31 . -12 VDC POWER: Used by system logic circuits.
B-5
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