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DB9-USB-RS232 Datasheet(PDF) 9 Page - Future Technology Devices International Ltd. |
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DB9-USB-RS232 Datasheet(HTML) 9 Page - Future Technology Devices International Ltd. |
9 / 27 page Copyright © 2010 Future Technology Devices International Limited 8 Document Reference No.: FT_000204 DB9-USB-RS232 Datasheet Version 1.2 Clearance No.: FTDI# 130 2.1.3 Replacing an RS232 DB9 FEMALE (DCE defined) Connector The DB9-USB-RS232-F can be used to replace a female DB9 connector used for transmitting RS232 protocol. With the DB9-USB-RS232-F in place instead of the standard USB connector a USB bridge is created, this allow the application to communicate with other devices via USB. Installing the DB9-USB- RS232-F is simple. Simply replace the female DB9 connector with the DB9-USB-RS232-F connector (same PCB footprint), install drivers and the device is ready to use. Table 2.3 gives the pin out description of each pad of an RS232 footprint. Figure 2.3 gives a description of the connections between the DB9-USB-RS232-F and the footprint of a female DB9 module. Figure 2.4 Illustrates the connection made to an example PCB. Pin Number Pin Type of DB9- USB-RS232 module Pin Type at application PCB Description 1 Input Output DCD = Data Carrier Detect (this is an input to the DB9-USB-RS232-F from the application DCD output) 2 Input Output RXD = Receive Data (this is an input to the DB9-USB-RS232-F from the application Tx output, normally labelled RXD in DCE convention) 3 Output Input TXD = Transmit Data (this is an output to the DB9-USB-RS232-F from the application Rx input, normally labelled TXD in DCE convention) 4 Output Input DTR = Data Terminal Ready (this is an output to the DB9-USB-RS232-F from the application DSR input, normally labelled DTR in DCE convention) 5 Ground Ground GND = RS232 signal ground 6 Input Output DSR = Data Set Ready (this is an input to the DB9-USB-RS232-F from the application DTR output, normally labelled DSR in DCE convention) 7 Output Input RTS = Request To Send (this is an output to the DB9-USB-RS232-F from the application CTS input, normally labelled RTS in DCE convention) 8 Input Output CTS = Clear To Send (this is an input to the DB9-USB-RS232-F from the application RTS output, normally labelled CTS in DCE convention) 9 Input Output RI = Ring Indicator (this is an input to the DB9-USB-RS232-F from the application RI output) Shield Ground Case Ground Drain = typically connected to the host PC case Table 2.3 – A Female RS232 DB9 footprint Pin-Out |
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