SLLSEO6C June 2015 – August 2018 TUSB321
The TUSB321 device can be configured as a UFP only by pulling the PORT pin low to GND. In UFP mode, the TUSB321 device constantly presents pulldown resistors (Rd) on both CC pins. The TUSB321 device monitors the CC pins for the voltage level corresponding to the Type-C mode current advertisement by the connected DFP. The TUSB321 device debounces the CC pins and wait for VBUS detection before successfully attaching. As a UFP, the TUSB321 device detects and communicates the advertised current level of the DFP to the system through the OUT1 and OUT2 pins.