To test these features on the TUSB217AEVM-BC:

1. Remove the 0-Ω resistor connecting the upstream VBUS and the EVM power (R1, R16, R31).
2. Externally power the EVM, by providing power to pin 1 of the 6 × 2 header (VCC_EXT_Px). This power source should be able to provide up to 1.5 A at 5 V DC. TI recommends setting the voltage slightly above 5 V to prevent droop issues.
3. There is an VBUS toggle circuit on the EVM that should provide an adequate VBUS toggle to force connected downstream devices to disconnect and reconnect when transitioning between CDP and DCP mode in most cases. This toggle length will vary depending on the voltage and bulk capacitance of the system, and may not work for all applications. If it does not, see Manual DCP/CDP Test Setup.
4. Verify that the charging device power consumption is as expected.