Digilent PmodUSBUART 410-212 User manual

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PmodUSBUART™ Reference Manual
RevisedApril10,2015
ThismanualappliestothePmodUSBUARTrev.A
DOC#: 502-212
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 1of 2
Overview
The PmodUSBUART module provides a USB to UART interface powered by the FTDI FT232RQ. This Pmod is
designed to be a direct replacement for the PmodRS232 and serial-to-USB cable combination.
1 FunctionalDescription
The PmodUSBUART uses the standard 6-pin connector to connect to the host device and a micro USB connector to
connect to a PC or other USB-capable device. The FTDI chip then converts the signal from UART to USB and vice-
versa.
2 InterfacingwiththePmod
The UART connector allows UART communications to go from the FTDI chip to the connected board. Note that the
PmodUSBUART uses the new Digilent UART pin configuration and requires the UART Crossover cable in order to
use older boards. To see what configuration your board has, see your board's page at http://store.digilentinc.com.
The PmodUSBUART.
USB to serial UART interface
Option to power the system board through
the FTDI chip
Features include:

PmodUSBUART™ Reference Manual
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 2of 2
Connector J2 –UART Communications
Pin
Signal
Description
1
RTS
Ready to Send
2
RXD
Receive
3
TXD
Transmit
4
CTS
Clear to Send
5
GND
Ground
6
SYS3V3
Power Supply (3.3V)
Table 1. Pinout description table.
3 SYS3V3Select(HeaderJP1)
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.
4 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).