9.4
General Purpose I/O Register
This register is at I/O address 213h.
7
6
5
4
3
2
1
0
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RFU
RFU
INPUT 1
INPUT 0
RFU
RFU
OUTPUT 1 OUTPUT 0
Bits 1 - 0: General Purpose Outputs to Transition Module (Read/Write)
0 = set output line to 0
1 = set output line to 1
Bits 3 - 2: Reserved
Bits 5 - 4: General Purpose Inputs from Transition Module (Read Only)
0 = input line is at 0
1 = input line is at 1
Bits 7 - 6: Reserved
NOTE
A multiplexed serial I/O scheme is used to connect these register bits to the I/O
pins on the Transition Module. Because of this, there is an output latency of 64µs
and the maximum input frequency (to avoid losing input transitions) is
approximately 8kHz.
9-6
PP 110/01x
Additional Local I/O Functions
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