PinDEVICE
Protocol
I2C BIT IO Expander / Controller
PCF8574 Model
Read Data
Header
0100 xxx 1
Data
b7 b6 b5 b4 b3 b2 b1 b0
Write Data
Header
0100 xxx 1
Data
b7 b6 b5 b4 b3 b2 b1 b0
