2.4 I/O Register Address
The OME-A-822PGL/PGH occupies 16 consecutive PC I/O addresses. The
following table lists the registers and their locations.
Address
Read
Write
Base+0
8254 Counter 0
8254 Counter 0
Base+1
8254 Counter 1
8254 Counter 1
Base+2
8254 Counter 2
8254 Counter 2
Base+3
Reserved
8254 Counter Control
Base+4
A/D Low Byte
D/A Channel 0 Low Byte
Base+5
A/D High Byte
D/A Channel 0 High Byte
Base+6
DI Low Byte
D/A Channel 1 Low Byte
Base+7
DI High Byte
D/A Channel 1 High Byte
Base+8
Reserved
A/D Clear Interrupt Request
Base+9
Reserved
A/D Gain Control
Base+A
Reserved
A/D Multiplexer Control
Base+B
Reserved
A/D Mode Control
Base+C
Reserved
A/D Software Trigger Control
Base+D
Reserved
DO Low Byte
Base+E
Reserved
DO High Byte
Base+F Reserved
Reserved
OME-A-822PGL/PGH Hardware Manual ----
16
