Xycom XVME-100, Manual

Page: 34 / 60

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Signal
Mnemonic
Connector
and
Pin Number
Signal Name and Description
ACFAIL* 1B:3
AC F A I L U R E : O p e n -collectors d r i v e n s i g n a l w h i c h
indicates t h a t t h e A C i n p u t t o t h e power supply i s n o
longer b e i n g p r o v i d e d , o r t h a t t h e r e q u i r e d i n p u t
voltage levels arc not being met.
I A C K I N '
1A:21 INTERRUPT A C K N O W L E D G E I N : To t e m -pole d r i v e n
signal. I A C K I N * and I A C K O U T * signals f o r m a daisy-
chained acknowledge. T h e IACK1N* signal indicates t o
the V M E b o a r d t h a t a n acknowledge c y c l e i s i n
progress.
IACKOUT* 1A:22
INTERRUPT ACKNOWLEDGE OUT: Totem-pole driven
signal. I A C K I N * and I A C K O U T * signals f o r m a daisy-
chained acknowledge. T h e I A C K O U T * signal indicates
to t h e n e x t b o a r d t h a t a n acknowledge c y c l e i s i n
progress.
AMO-AM5
IA:23 ADDRESS M O D I F I E R ( b i t s 0 - 5 ) : T h r e e -state d r i v e n
1B:16,17, lines t h a t p r o v i d e a d d i t i o n a l i n f o r m a t i o n a b o u t t h e
18,19
address b u s , s u c h a s : s i z e , c y c l e t y p e , a n d / o r D T B
1C:14
master identification.
AS*
1A:18 ADDRESS S T R O B E : T h r e e -state d r i v e n s i g n a l t h a t
indicates a v a l i d address is on the address bus.
Appendix A
VMEbus CONNECTOR/PIN DESCRIPTION
Table A - I . P 1 - VMEbus Signal Identification
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