Xycom XVME 200 Manual page 42

XVME-200/290 Manual
December, 1987
The XVME-200 and XVME-290 Modules are VMEbus compatible boards. There is
one 96-pin bus connector on the rear edge of the board labeled Pl (refer to
Chapter 2, Figure 2-1 for the location) and the XVME-290/l also uses the P2
connector. The signals carried by connector Pl are the standard address, data, and
control signals required for a Pl backplane interface, as defined by the VMEbus
specification. Table A-1 identifies and defines the signals carried by the Pl
connector. Table A-3 shows the pin-outs for the P2 connector.
Connector
Signal * and
Mnemonic Pin Number
ACFAIL* lB:3
IACKIN* lA:21
IACKOUT* 1A:22
AMO-AM5
1A:23
lB:16,17,
18,19
lC:14
AS* lA:18
Appendix A
VMEbus CONNECTOR/PIN DESCRIPTION
Table A-l. Pl - VMEbus Signal Identification
Signal Name and Description
AC FAILURE: Open-collectors 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 acknowledge cycle is in
progress.
INTERRUPT ACKNOWLEDGE OUT: Totem-pole driven
signal. IACKIN*
chained acknowledge. The IACKOUT* signal indicates
to the next board that an acknowledge cycle is in
progress.
ADDRESS MODIFIER (bits O-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.
and IACKOUT* signals form a daisy-
A-l
.