SLVUBM1C January   2019  – January 2021 TPS65994AD

 

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8.1 Connection Not Established

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 TPS65994 using the TPS65994 Configuration Tool
  • Verify the CC lines are toggling for Dual-Role Port functionality
  • Verify the following system supplies:
    • System_3V3 and VIN_3V3: 3.3 V
    • System_5V : 5 V
    • Barrel jack and SYS_PWR: 20 V
    • LDO_3V3: 3.3 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