4 control register, 5 external trigger enable register – ADLINK PCI-7396 User Manual
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Registers Format
• 19
3.4 Control Register
Each PPI’s control register is used to set its three ports to be as input or
output one independently.
Address: BASE + 04h
Attribute: write only
Data Format:
Bit
7
6
5
4
3
2
1
0
BASE+ 04h
x
x
x
x
x
P1C
P1B
P1A
BASE+ 05h
x
x
x
x
x
x
x
x
BASE+ 06h
x
x
x
x
x
x
x
x
BASE+ 07h
x
x
x
x
x
x
x
x
P1n : n: port number
Set to be ‘0’ for input port , ‘1’ for output port
3.5 External Trigger Enable Register
Users can write anything to this register to enable the external trigger to latch
the input data of port A,B and C simultaneously. Note that when this register
is enabled, the settings of the previous control register are disabled.
Address: BASE + 08h
Attribute: write only
Data Format:
Bit
7
6
5
4
3
2
1
0
BASE+08h
x
x
x
x
x
x
x
x
BASE+09h
x
x
x
x
x
x
x
x
BASE+0A
h
x
x
x
x
x
x
x
x
BASE+0B
h
x
x
x
x
x
x
x
x