DS_USB_RS232_PCB Datasheet, PDF (10/16 Pages) List of Unclassifed Manufacturers – Future Technology Devices International Ltd USB to RS232 UART Serial Converter PCB Datasheet

Document Reference No.: FT_000079
USB TO RS232 UART SERIAL CONVERTER PCB Datasheet Version 1.41
Clearance No.: FTDI# 52
4.1 USB-RS232-PCB Signal Descriptions
Name
Type
Description
GND
GND
Device ground supply pin.
CTS#
Input Clear to Send Control input / Handshake signal.
POWER
Output
Power output. Default is GND, but can be customised to
output +3.3V or +5V. If required, contact FTDI Sales Team
([e-mail])
TXD
Output Transmit Asynchronous Data output.
RXD
Input Receive Asynchronous Data input.
RTS#
Output Request To Send Control Output / Handshake signal.
Table 4.1 USB-RS232-PCB Signal Descriptions
4.2 USB-RS232-PCB +5V/+3.3V Selection
Selection of whether the POWER signal is GND, +3.3V or +5V is done using resistors. The following table
gives details of what resistors are required for the different voltage levels.
Resistor Resistor
Description
R2
R3
Not
Fitted
Not
Fitted
VCC floats
Fitted
Not
Fitted
POWER Signal is +3.3V
Not
Fitted
Fitted POWER Signal is +5.0V
Table 4.2 UART Signal Level Selection
Copyright © 2011 Future Technology Devices International Limited
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