User`s guide

3.2 Analog Output Status Register

The DAC is with series bus hence it take times to send digital value out.

The data transfer time for every DA data write takes 2.2µs, therefore the

software driver must wait for 2.2µs before send another data to any

analog output port. While the DA value is sending, the Data_Send bit is

‘H’. The software driver should check this bit before write any data to

output port. This register is read only.

Offset Address D16~D1 D0

0x00 X Data_Send

3.3 Digital Output Register

D0~D3 is the digital output signal written to output channel. D4~D7 don’t

care.

Offset Address D7 D6 D5 D4 D3 D2 D1 D0

0x40 X X X X DO3 DO2 DO1 DO0

3.5 Digital Input Register

D4~D7 is digital input signal from CN1.

D0~D3 is read back signal from digital output channel.

Offset Address D7 D6 D5 D4 D3 D2 D1 D0

0x40 DI3 DI2 DI1 DI0 DO3 DO2 DO1 DO0