Xycom XVME 200, Manual

Page: 46 / 57

XVME-200/290 Manual
December, 1987
Table A-l. VMEbus Signal Identification (cont’d)
Signal
Mnemonic
Connector
and
Pin Number Signal Name and Description
SYSFAIL* 1C:l0 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:l4 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 l.A:32
1 B:32
1 C:32
2B:1,13,32
+5 VDC POWER: Used by system logic circuits.
+12v
-12v
lC:31
lA:31
+12 VDC POWER: Used by system logic circuits.
-12 VDC POWER: Used by system logic circuits.
A-5