ZHCSJJ3E July 2009 – April 2019 TCA9555
PRODUCTION DATA.
Data is exchanged between the master and the TCA9555 through write and read commands, and this is accomplished by reading from or writing to registers in the slave device.
Registers are locations in the memory of the slave which contain information, whether it be the configuration information or some sampled data to send back to the master. The master must write information to these registers in order to instruct the slave device to perform a task.