### Implementing the Accessory Operation Function Set<a name="section4223"></a>
The callbacks **AccessoryDeviceRegRead** and **AccessoryDeviceRegWrite** invokes**AccessoryI2cReadWrite** to read and write the control register values.
The callbacks **AccessoryDeviceRegRead** and **AccessoryDeviceRegWrite** invoke **AccessoryI2cReadWrite** to read and write the control register values.