Mode 0-Basic I/O; Table B-4. Mode 0 I/O Configurations - National Instruments PCI-DIO-96 User Manual

Appendix B Register-Level Programming — Programming
Mode 0—Basic I/O
Use mode 0 for simple I/O functions (no handshaking) for each of the three ports and assign
each port as an input or an output port. Table B-4 shows the 16 possible I/O configurations.
Notice that programming the mode of operation for each port sets bit 7 of the control word.
Control Word
Number Bit 76543210
0 10000000
1 10000001
2 10000010
3 10000011
4 10001000
5 10001001
6 10001010
7 10001011
8 10010000
9 10010001
10 10010010
11 10010011
12 10011000
13 10011001
14 10011010
15 10011011
†
Upper nibble of port C
‡
Lower nibble of port C
PCI-DIO-96/PXI-6508/PCI-6503 User Manual

Table B-4. Mode 0 I/O Configurations

Group A
Port A Port C
Output
Output
Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
B-18
†
Port B
Output Output
Output Output
Output Input
Output Input
Input Output
Input Output
Input Input
Input Input
Output Output
Output Output
Output Input
Output Input
Input Output
Input Output
Input Input
Input Input
Group B
‡
Port C
Output
Input
Output
Input
Output
Input
Output
Input
Output
Input
Output
Input
Output
Input
Output
Input
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