National Instruments SCXI-1163 - Manual (Page 56)

Programming Chapter 5
SCXI-1163 User Manual 5-2 © National Instruments Corporation
Table 5-1. SCXIbus to SCXI-1163 Rear Signal Connector to Data Acquisition Board
Pin Equivalences
SCXIbus Line SCXI-1163 Rear Signal Connector MIO Boards Lab-NB/Lab-PC/ Lab-PC+/Lab-LC PC-LPM-16 DIO-24 DIO-96 DIO-32F
MOSI
D*/A
INTR*
SPICLK
MISO SERDATIN
DAQD*/A
SLOT0SEL*
SERCLK
SERDATOUT ADIO0
ADIO1
ADIO2
EXTSTROBE*
BDIO0 PB4
PB5
PB6
PB7
PC1 DOUT4
DOUT5
DOUT6
DOUT7
DIN6 PB3
PB2
PB1
PB0
PA0 APB3
APB2
APB1
APB0
APA0 DIOB3
DIOB2
DIOB1
DIOB0
DIOA0
Register Selection and Write Procedure
1. Select the slot of the module to be written to. Initial conditions:
SERDATIN = X.
DAQD*/A = 1.
SLOT0SEL* = 1.
SERCLK = 1.
2. Clear SLOT0SEL* to 0. This deasserts all SS* lines to all modules in all chassis.
3. For each bit, starting with the MSB (bit 15), do the following:
a. Set SERDATIN = bit to be sent. These bits are the data that is written to the
Slot-Select Register.
b. Clear SERCLK to 0.
c. Set SERCLK to 1. This rising edge clocks the data. If you are using an MIO-16 board,
writing to the EXTSTROBE* register pulses EXTSTROBE* low and then high,
accomplishing steps 3b and 3c.
4. Set SLOT0SEL* to 1. This asserts the SS* line of the module whose slot number was
written to Slot 0. If you are using multiple chassis, only the appropriate slot in the chassis
whose address corresponds to the written chassis number is automatically selected. When no
communication is taking place between the data acquisition board and any modules, write
zero to the Slot-Select Register to ensure that no accidental writes occur.