A-1
APPENDIX A - VMEBUS CONNECTOR/PIN DESCRIPTION
A.1
VMEBUS SIGNAL IDENTIFICATION
Table A-1 (on pages 1 through 5) shows the VMEbus Signal Identification. Table A-2, on page 6, shows the Backplane P1
pin assignments.
Table A-1. VMEbus Signal Identification
Signal
Mnemonic
Connector and
Pin Number
Signal Name and Description
ACFAIL*
IACKIN*
IACKOUT*
AM0-AM5
AS*
1B:3
1A:21
1A:22
1A:23
1B:16, 17
18, 19
1C:14
1A:18
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 acknowledge
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.
Содержание XVME-113
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