Xycom XVME-560, Manual

Page: 53 / 70

XVME-560 Manual
September, 1984
Appendix B
VMEbus CONNECTOR/PIN DESCRIPTION
The XVME-560 module is physically configured as a non-expanded (NEXP), double-
height, VMEbus compatible board. There is one 96-pin bus connector on the rear edge
of the board labeled P1 (refer to Chapter 2, Figure 2-l for the location). The pin
connections for P1 contain the standard address, data, and control signals necessary
for the operation of NEXP modules. The following tables identify the VMEbus signals
by signal mnemonic, connector and pin number, and signal characteristic.
Table B-1. Pl - VMEbus Signal Identification
Signal
Mnemonic
ACFAIL*
IACKIN*
IACKOUT*
AMO-AM5
A S *
A0I-A23
Connector
and
Pin Number
1B: 3
IA: 21
1A: 22
1A: 23
1B: 16,17,
18,19
C : 14
A: 18
1A: 24-30 ADDRESS bus (bits l-23) - Three-state driven
l C : 15-30 address lines that specify a memory address.
Signal Name and Description
AC FAILURE - open-collector driven signal which
indicates that the AC input to the power supply is
no longer being provided or that the required input
voltage levels are not being met.
INTERRUPT ACKNOWLEDGE IN - Totem-pole
driven signal. IACKIN* and IACKOUT* signals
form a daisy-chained acknowledge. The IACKIN*
signal indicates to the VME board that an acknow-
ledge cycle is in progress.
INTERRUPT ACKNOWLEDGE OUT - Totem-pole
driven signal. IACKIN* and IACKOUT* signals
form a daisy-chained acknowledge.
The
IACKOUT* signal indicates to the next board that
an acknowledge cycle is in progress.
ADDRESS MODIFIER (bits 0-5) - Three-state
driven lines that provide additional information
about the address bus, such as size, cycle type,
and/or DTB master identification.
ADDRESS STROBE - Three-state driven signal
that indicates a valid address is on the address bus.
B-I