db9-usb Future Technology Devices International Ltd., db9-usb Datasheet - Page 12

• Manufacturer Part Number: db9-usb
• Description: The Db9-usb Family Of Usb To Uart Converter Modules
• Manufacturer: Future Technology Devices International Ltd.

3.1.1 Male DB9 UART Connector Signals
The DB9-USB-X-M can be used to replace a male DB9 connector used for transmitting UART signals.
Table 2.1 gives the pin out description of each pin/pad of a UART connector/footprint.
Note 1: These signals are irrelevant for DTE to DTE connections.
Number
Shield
Pin
1
2
3
4
5
6
7
8
9
Pin Type of DB9-
USB module
Ground
Ground
Output
Output
Output
Input
Input
Input
Input
Input
Copyright © 2011 Future Technology Devices International Limited
1
1
Table 2.1 – Male DB9 UART Signal Description
application PCB
Pad Type at
Case Ground
Ground
Output
Output
Output
Input
Input
Input
Input
Input
1
1
(this is an input to the DB9-USB-X-M from
(this is an input to the DB9-USB-X-M from
(this is an input to the DB9-USB-X-M from
Drain = typically connected to the host PC
(this is an output from the DB9-USB-X-M
(this is an output from the DB9-USB-X-M
(this is an output from the DB9-USB-X-M
to the application DSR input)
to the application CTS input)
GND = RS232 signal ground
DTR = Data Terminal Ready
the application DTR output)
the application RTS output)
to the application Rx input)
DCD = Data Carrier Detect
the application Tx output)
RTS = Request To Send
Document Reference No.: FT_000204
DSR = Data Set Ready
TXD = Transmit Data
CTS = Clear To Send
RXD = Receive Data
RI = Ring Indicator
Description
case
Clearance No.: FTDI# 130
DB9-USB Datasheet
Version 2.1
11