Xycom XVME 590 Manual page 72

XVME-500/590 Manual
February, 1988
The XVME-500 and XVME-590 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-590 also uses the P2
connector. The signals carried by connector PI are the standard address, data, and
control signals required for a PI backplane interface, as defined by the VMEbus
specification. Table B-l identifies and defines the signals carried by the Pl
connector. Table B-3 shows the pin-outs for the P2 connector.
Connector
Signal
and
Mnemonic Pin Number
ACFAIL*
lB:3
IACKIN* IA:21
IACKOUT* 1A:22
AMO-AM5 1A:23
lB:16,17,
lC:14
lA:18
AS*
Table B-l. Pl - VMEbus Signal Identification
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
the VME board that an acknowledge cycle is in
progress.
INTERRUPT ACKNOWLEDGE OUT: Totem-pole driven
signal. IACKIN* and IACKOUT* signals form a daisy-
chained
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
18,19 address bus, such as: size, cycle type, and/or DTB
master
ADDRESS STROBE: Three-state driven signal that
indicates a valid address is on the address bus.
Appendix B
Signal Name and Description
acknowledge. The IACKIN* signal indicates to
acknowledge. The IACKOUT* signal indicates
identification.
B-l