A typical usage of the TUSB564 device is shown in Figure 9-2. The device can be controlled either through its GPIO pins or through its I²C interface. In the example shown below, a Type-C PD controller is used to configure the device through the I²C interface. In I2C mode, the equalization settings for each receiver can be independently controlled through I2C registers. For this reason, the configuration pin CTL1 and all of the equalization pins (EQ[1:0], SSEQ[1:0], and DPEQ[1:0]) can be left unconnected. If these pins are left unconnected, the TUSB564 7-bit I2C target address will be 0x12 because both DPEQ/A1 and SSEQ0/A0 will be at pin level "F". If a different I2C target address is desired, DPEQ/A1 and SSEQ0/A0 pins should be set to a level which produces the desired I2C target address.

Figure 9-2 Application Circuit