The TSU5511 is designed to interface the cell phone UART, USB, and audio chips with external peripherals via a micro-USB connector. This switch features impedance detection for identification of various accessories that are attached through the DP and DM contacts of the micro-USB port. When an accessory is plugged into the micro-USB port, the switch uses a detection mechanism to identify the accessory. It will then switch to the appropriate channel; data, audio, or UART. The TSU5511 has an I2C interface for communication with the cell phone baseband or applications processor. An interrupt is generated when a device is connected to the micro-USB and is detected; another interrupt is generated when the device is unplugged.