The following checks help resolve issues when connecting the EVM to another EVM or USB Type-C device and no status LEDs are on:
- Verify that a firmware image is loaded in on the TPS65988 using the TPS65988 Configuration Tool
- Verify the CC lines are toggling for Dual-Role Port functionality (see Figure 7-3)
- Verify the following system supplies:
- System_3V3 and VIN_3V3: 3.3 V
- System_5V and PP_CABLE: 5 V
- Barrel jack and SYS_PWR: 20 V
- LDO_3V3: 3.3 V
- LDO_1V8: 1.8 V
- Verify that the devices connected are compatible. The following are some of the compatible connections:
- Dual-Role Port → UFP
- Dual-Role Port → DFP
- DFP → UFP
- Verify that VBUS is reaching 5 V when connected, (see Figure 7-4)
Figure 7-3 DRP CC1 and CC2 Toggling Figure 7-4 USB Type-C™ Connection and VBUS