Register Selection And Write Procedure; Table 5-1. Scxibus To Scxi-1160 Rear Signal Connector To Data Acquisition Board Pin Equivalences - National Instruments SCXI-1160 User Manual

Programming
Table 5-1. SCXIbus to SCXI-1160 Rear Signal Connector to Data Acquisition Board Pin
MOSI SERDATIN
D*/A DAQD*/A
INTR* SLOT0SEL*
SPICLK SERCLK
MISO SERDATOUT

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.
SCXI-1160 User Manual
Equivalences
ADIO0 PB4
ADIO1 PB5
ADIO2 PB6
PB7
EXTSTROBE*
BDIO0 PC1
5-2
DOUT4 PB3 APB3
DOUT5 PB2 APB2
DOUT6 PB1 APB1
DOUT7 PB0 APB0
DIN6 PA0 APA0
© National Instruments Corporation
Chapter 5
DIOB3
DIOB2
DIOB1
DIOB0
DIOA0