USB Interaction

USB Roles

Device Role

The PLT-300A can be used to test a DUT in USB Device Role without any extra additions: the PLT-300A acts as the host, with the DUT connected to the Type-C port on the rear of the PLT-300A.

In case the Pogo-Pin Cassette (PPC) contains an additional SBC with which USB interaction from the PLT is required (for example, to update the SBC firmware over USB), the PPC can be equipped with a USB 2.0 or USB 3.0 hub.

Host Role

To test interaction with a DUT in USB Host Role, a USB Peripheral needs to be added to the test fixture, for example by including an USB Device-capable SBC like the Raspberry Pi Zero to the Pogo-Pin Cassette.

The DUT acts as the host, with the SBC USB Device port connected to the USB Host port of the DUT. The SBC can be controlled from the test plan with a UART connection between the SBC and the PLT.

In case USB interaction from the PLT is required (for example, to update the SBC’s firmware over USB), the PPC should be equipped with a USB hub that allows switching between two different hosts, such as the Microchip USB5807C Hub Controller included in the PLT Breakout Board.

External References