db9-usb-rs232 Future Technology Devices International Ltd., db9-usb-rs232 Datasheet - Page 26

• Manufacturer Part Number: db9-usb-rs232
• Description: Rs232 Connection
• Manufacturer: Future Technology Devices International Ltd.

Note that the DB9-USB-RS232-M is not a DB9-USB-RS232-F with its pins latterly inverted; there is a
“null-modem” wiring configuration present in the DB9-USB-RS232-M module. This means that a DB9-
USB-RS232-M is not pin compatible with a female footprint when placed on the underneath side of the
board.
Table B.2 – RS232 DTE to DTE connection with null-modem wiring
DTE Pin Number
Copyright © 2010 Future Technology Devices International Limited
2
3
4
5
6
7
8
Signal Name
RXD = Receive Data
TXD = Transmit Data
DTR = Data Terminal Ready
GND = RS232 signal ground
DSR = Data Set Ready
RTS = Request To Send
CTS = Clear To Send
DTE Pin Number
Document Reference No.: FT_000204
3
2
6
5
4
8
7
DB9-USB-RS232 Datasheet
Clearance No.: FTDI# 130
Version 1.2
25