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The Digital I/O is of TTL interface. It is controlled via
software programming.
Digital I/O Programming
Input/output address:
In_Data 0~3=SD0~SD1
Out_Data 0~3 SD4~SD7
EXAMPLE:
10
REM Digital I/O example program
20
X = INP (&H208)
30
X = OUT (&H208)
60
END
100 Return
Port 208H Definition
LIBRA 120 III (PC620 Intel 815E)
www.pdffactory.com
User Manual version 2503
208H
REM INPUT Digital I/O port
for 4 bit
REM OUTPUT Digital I/O port
for 4 bit
6-115
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