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Connector Descriptions
The MXIbus defines 49 active signals, 12 ground lines, and 1 line for terminator power. Table
D-2 describes the signals on the MXIbus connector and groups them in five categories.
Category
Address/Data
Arbitration
Interrupt
Utility
Power
Notice that there are 12 ground contacts on the connector. The 48 twisted ground lines in the
cable are generated from these lines under the cable connector hood. Also notice that although
there are two connector contacts required for the GIN*–GOUT* daisy-chain, only one signal line
is required in the cable assembly.
For more information, refer to the MXIbus specification.
VXI-MXI User Manual
Table D-2. MXIbus Signal Groupings
Description
Address/Data
Address Modifier
Address Strobe
Transfer Size
Read/Write
Data Strobe
Data Acknowledge
Parity
MXIbus Busy
MXIbus Request
MXIbus Grant In
MXIbus Grant Out
Interrupt Request
MXIbus Error
Ground
Terminator Power
Signal Name
Lines
AD[31-00]*
AM[4-0]*
AS*
SIZE*
WR*
DS*
DTACK*
PAR*
BUSY*
BREQ*
GIN*
GOUT*
IRQ*
BERR*
GND
TERMPWR
D-2
© National Instruments Corporation
Appendix D
Pin Numbers
32
6-37
5
1-5
1
39
1
44
1
40
1
38
1
41
1
43
1
46
1
45
1
60
1
59
1
61
1
42
12
47-58
1
62
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