2.5 Digital I/O
The A-812PG provides 16 digital input channels and 16 digital output
channels. All levels are TTL compatible. The connections diagram and block
diagram are given below:
A-812PG
Output Latch Register
Output Latch Register
Latch
Reset
Power on
reset
Reset
Latch
D0..D7
D8..D15
CN5
1..8
9..16
TTL
DI
DGND
17..18
DGND
D0..D7
Base+D
Base+E
External
Device
A-812PG
Read
Read
D0..D7
Input Buffer Register
Base+6
Base+7
D0..D7
D8..D15
CN4
1..8
9..16
Input Buffer Register
TTL
DO
DGND
17..18
DGND
External
Device
A-812PG Hardware Manual (Ver.1.2, Sep/2005, IPH-004-12) -----
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