User`s guide

Operation Theorem
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4.3 Digital Input and Output
To program digital I/O operation is fairly straight forward. The digital input
operation is just to read data from the corresponding registers, and the digital
output operation is to write data to the corresponding registers. The digital I/O
registers
‘
format are shown in section 4.9. Note that the DIO data channel
can only be read or written in form of 8 bits together. It is impossible to
access individual bit channel.
The ACL-8216 provides 16 digital input and 16 digital output channels
through the connector CN1 and CN2 on board. The digital I/O signal are fully
TTL/DTL compatible. The detailed digital I/O signal specification can be
referred in section 1.3.
Digital Output (DO)
Digital GND (DGND)
Digital Input(DI)
From TTL S ignal
To TTL Devic es
ACL-8216
Outside Device
74LS244
74LS373