The Digilent PmodUSBUART is a USB to UART Serial converter module capable of transfer rates upwards of 3 Mbaud.

Functional Description

The PmodUSBUART provides a USB to UART cross-conversion through the FTDI FT232RQ. Users may send data in either direction on the Pmod and receive the converted data in the appropriate format.

Interfacing with the Pmod

The PmodUSBUART communicates with the host board via the UART protocol. Users may either provide data through the USB port or have the on-board FTDI chip automatically translate the USB styled data into the UART protocol. Similarly, data provided through UART is automatically translated by the FTDI chip to the USB interface. Different speeds, parity, and other settings can be configured through a terminal emulator on your computer.
 

Any external power applied to the Pmod must be within 2.5V and 5.5V; however, it is recommended that the Pmod is operated at 3.3V.

SYS3V3 Select (Header JP1)

The board attached to the PmodUSBUART can have its 3.3V rail powered by the header JP1. If jumper JP1 is set to SYS, then the SYS3V3 pin is powered by the VCC outputted by the FTDI chip. If the board attached to the PmodUSBUART is powered on its own, the jumper should be set to LCL.

LEDs

There are two LED indicators on the PmodUSBUART. LD1 indicates a data transfer from the micro-USB connector (J1) to the UART connector (J2). LD2 indicates a data transfer from the UART connector (J2) to the micro-USB connector (J1).

Physical Dimensions

The pins on the pin header are spaced 100 mil apart. The PCB is 1.0 inches long on the sides parallel to the pins on the pin header and 0.8 inches long on the sides perpendicular to the pin header.