AT8575C中文资料I/O 扩展-接口数据手册Analogtek规格书

描述 Description

The device is a silicon CMOS circuit. It provides generalpurpose remote I/O expansion for most microcontrollerfamilies via the two-line bidirectional bus (I2C-bus).The device consists of a 16-bit quasi-bidirectional port andan I2C-bus interface. The AT8575C has a low currentconsumption and includes latched outputs with highcurrent drive capability for directly driving L EDs. It alsopossesses an interrupt line (INT) which can be connectedto the interrupt logic of the microcontroller. By sending aninterrupt signal on this line, the remote I/O can inform themicrocontroller if there is incoming data on its ports withouthaving to communicate via the I2C-bus. This means thatthe device is an I2C-bus slave transmitter/receiver.
Every data transmission from the AT8575C must consistof an even number of bytes, the first byte will be referredto as P07 to P0O and the second byte as P17 to P10. Thethird will be referred to as P07 to P0O and so on.