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Appendix C
SCXIbus Connector Signal Descriptions
Pin
Signal Name
A19
RESET*
B19
MISO
C19
D*/A
D19
INTR*
A21, B21, C21,
CHSGND
D21
A22, B22, C22,
V+
D22
A23, D23
+5 V
B23
SPICLK
C23
MOSI
B24
SS*
* Indicates active low.
All other pins are not connected.
Further information is given in Chapter 3,
© National Instruments Corporation
Description
Reset – When pulled low, reinitializes the module to its
power-up state. Totem pole. Input.
Master-In-Slave-Out – Transmits data from the module
to the SCXIbus. Open collector. I/O.
Data/Address – Indicates to the module whether
address information or data information is being sent to
the module on MOSI. Open collector. I/O.
Interrupt – Active low. Causes data that is on MOSI to
be written to the Slot 0 Slot-Select Register. Open
collector. Output.
Chassis Ground – Digital and analog ground reference.
Positive Analog Supply – +18.5 to +25 V.
+5 VDC Source – Digital power supply.
Serial Peripheral Interface (SPI) Clock – Clocks the
serial data on the MOSI and MISO lines. Open
collector. I/O.
Master-Out-Slave-In – Transmits data from the
SCXIbus to the module. Open collector. I/O.
Slot Select – When low, enables module
communications over the SCXIbus. Totem pole. Input.
Theory of
Operation.
C-3
SCXIbus Connector
SCXI-1163 User Manual
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