Voice USB pinout

I am exploring the device as USB audio device, but was unable to locate a schematic for the Voice. The Pinout diagrams do not include all interfaces including the USB port.

Is the FPGA attached to the USB port?

Hi @chaseadam,

Welcome to the community!

The micro-USB port is actually only for power and does not have any data lines.

The only way the MATRIX Voice can be used as a USB device is using a USB to TTL serial cable like this one and attaching it to the UART RX and TX pins on the Raspberry Pi side GPIO.