Patent ID: 11933841
Assignee: SILICONCH SYSTEMS PVT LTD
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A method for testing a universal serial bus power delivery (USBPD) integrated circuit (IC), the method comprising:
sending custom USBPD signaling and USBPD packets on a configuration channel (CC) pin;
configuring test modes by custom USBPD packets on the CC pin;
detecting a test mode entry based on received custom USBPD signaling data and packets on CC pin;
observing a test mode parameters on the CC pin;
causing an auto test mode exit or exiting with a short circuit or over current on the CC pin; and
applying design for testing (DFT) architecture in the testing of the USBPD integrated circuit for the DFT test mode entry detection through the custom USBPD signaling data and packets which are decoded,
wherein, during a logic built-in self-test (LBIST) test mode, the method further comprises:
configuring LBIST test mode parameters, the LBIST test mode parameters comprising one or more of PRPG seed, pattern count, and expected LBIST signature, by a USBPD packet on the CC pin;
triggering the LBIST test mode with the USBPD packet on the CC pin;
automatically resetting a digital logic and causing an LBIST test mode exit after completion of the LBIST test mode without external intervention; and
reading a status of the LBIST test mode signature from the USBPD packet on a single CC in.