Interface circuit between AD574A and PC bus
Source: InternetPublisher:supremeOne Keywords: Bus interface circuit PC AD Updated: 2020/05/10
An example of AD574A in 12-bit conversion mode interfacing with PC bus through 82F/5A is given . In the figure, the -12/8 pin of AD574A
is connected to 5V, and Ao is connected to ground, so that AD674AI operates in 12-bit conversion and readout mode. CE, CS and R/C are
connected to PC2 ~ PC O.
The C port of iHd 8255A can output control signals to them. Port A and port B of 8255A both work in mode 0,
the upper part of port AO, port B and port C is the input mode - and the lower part of port e is the output mode. The analog signal input to AD 5 74A adopts unipolar input mode
, and the analog voltage of o-iov is input through the l01nN input terminal. 8255A system address 2COH—2C3H.
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