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PMIC: CP240x LCD Driver Family Slide 49
This page shows the data structure for the I2C communications to the CP2401 and CP2403 devices. All transfers begin with the Start bit followed by the address that is determined by the combination of the fixed bits, the SMB0 pin and the direction bit. The first byte transmitted from the master node is the command and can be one of the 6 illustrated on a previous slide. The device acknowledges the address if it matches the configured address. The next two bytes make up the internal register or memory address starting with the high byte and then the low byte. This is then followed by the data bytes.
PTM Published on: 2011-05-13