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FAQ: How do I address multiple AIC23 devices on one I2C bus?

Answer:
The AIC23 will respond to two I2C addresses depending on the state of the CS pin (PW pin 21). if CS = 0, the I2C address is 0011010 if CS = 1, the I2C address is 0011011 If two AIC23 devices are on the I2C bus, their CS pins can be tied (one to ground and one to VDD) and the I2C master can address them separately. If there are more than two AIC23 devices on the I2C bus, The I2C master will have to dedicate an equal number of GPIO pins to multiplex the CS pins. The I2C master will then write to only one address, and the GPIO pins will determine which device is selected to receive the transaction.