5 TUSB1044 Host Implementation Example

Figure 5-1 shows the TUSB1044 implementation example at the source side. Table 5-1 defines the TUSB1044 pin configuration for this particular example. For AMD platforms, the APU Crossbar and the TUSB1044 are usually controlled by the PD controller using the same I²C bus. Consider using a level shifter to isolate different power rails and to prevent leakage.

Since the TUSB1044 upstream is connected to the APU and the downstream is connected to the USB Type-C connector, set the SWAP and DIR[0:1] appropriately as shown in Table 5-1. Note that SWAP and DIR[0:1] can also be controlled through I²C registers.

Figure 5-1 TUSB1044 Block Diagram in a DFP System