Copyright 2005 AN232B-09 Modem Emulation Mode Table Contents

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Copyright 2005 AN232B-09 Modem Emulation Mode Table Contents

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AN232B-09 Using Modem Emulation Mode FTDI's Driver
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AN232B-09 Modem Emulation Mode
Table Contents
Part Introduction Part Modem Emulation
Method
XOn-XOff Software Handshaking Enabling Modem Emulation Mode
Part Document Revision History Part Disclaimer Part Contact Information Index
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Introduction
Introduction
Modem Emulation Mode special feature FTDI's Virtual Port (VCP) driver that allows binary data transmitted over more) wire interface with full handshaking modem control signalling, thus allowing connections made. Possible applications include mobile phone data cables radio links. Modem Emulation Mode setup driver file (FTDIPORT.INF) enabled registry. purpose allow modem emulation done driver when device attached standard modem. reason this that many standard applications require line know that they internet (e.g. Dial Networking).
Copyright 2005
AN232B-09 Modem Emulation Mode
Modem Emulation
Method
This method XOn/XOff hardware RTS/CTS handshaking. Both XOn/XOff characters escape character definable. standard ones will 0x11 XOff 0x13 EscChar 0x10
Transmitter
Data XOff EscChar 0x01 0x02 Flow Control Flow Control Data Transmitted EscChar 0x01 EscChar 0x02 EscChar EscChar 0x01 0x02 XOff
Receiver
Data Received EscChar 0x01 EscChar 0x02 EscChar EscChar 0x01 0x02 XOff Data XOff EscChar 0x01 0x02 None None
FTDI Driver
Command SetDTR ClrDTR 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F Data Transmitted EscChar 0x03 EscChar 0x04 0x01 0x01 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
Application Hardware
Data Received EscChar 0x03 EscChar 0x04 0x01 0x01 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F Status Active Inactive 0x01 0x01 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
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Modem Emulation following ones applicable RTS/CTS hardware handshaking used:
FTDI Driver
Command SetRTS ClrRTS Data Transmitted EscChar 0x05 EscChar 0x06
Application Hardware
Data Received EscChar 0x05 EscChar 0x06 Status Active Inactive
Application Hardware
Command SetDSR ClrDSR SetDCD ClrDCD SetRI ClrRI 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E Data Transmitted EscChar 0x07 EscChar 0x08 EscChar 0x09 EscChar 0x0A EscChar 0x0B EscChar 0x0C 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E
FTDI Driver
Data Received EscChar 0x07 EscChar 0x08 EscChar 0x09 EscChar 0x0A EscChar 0x0B EscChar 0x0C 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E Status Active Inactive Active Inactive Active Inactive 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E
following ones applicable RTS/CTS hardware handshaking used:
Application Hardware
Command SetCTS ClrCTS Data Transmitted EscChar 0x0D EscChar 0x0E
FTDI Driver
Data Received EscChar 0x0D EscChar 0x0E Status Active INactive
Copyright 2005
AN232B-09 Modem Emulation Mode
XOn-XOff Software Handshaking
XOff characters substituted this way, then binary sent without affecting flow control. transmitter receives XOff character should stop transmission start being received. receiver wants stop transmission should send XOff etc.
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Modem Emulation
Enabling Modem Emulation Mode
Modem Emulation mode substitution bits enabled setting following bits driver file FTDIPORT.INF {HEX format} Force XOn/XOff handshaking flow control active following substitutions following convention will used don't don't Substitute XOn/XOff Control Char Substitute Control Char Substitute Control Char Substitute Control Char Substitute Control Char 10,9 Substitute Control Char 12,11 Substitute Control Char 14,13 appropriate set, then driver will assume normal method receiving/setting line.
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AN232B-09 Modem Emulation Mode
Document Revision History
Version Release Date March 2004 2005 Comments Initial release "Data Out" "Status Out" column added each table.
Copyright 2005
Disclaimer
Disclaimer
Copyright 2005 Future Technology Devices International Ltd. Neither whole part information contained product described this manual, adapted reproduced material electronic form without prior written consent copyright holder. This product documentation supplied as-is basis warranty their suitability particular purpose either made implied. Future Technology Devices International Ltd. will accept claim damages howsoever arising result failure this product. Your statutory rights affected. This product variant intended medical appliance, device system which failure product might reasonably expected result personal injury. This document provides preliminary information that subject change without notice.
Copyright 2005
AN232B-09 Modem Emulation Mode
Contact Information
Head Office Glasgow, Future Technology Devices International Limited Scotland Street Glasgow United Kingdom Tel: 2777 Fax: 2758 E-Mail (Sales): sales1@ftdichip.com E-Mail (Support): support2@ftdichip.com E-Mail (General Enquiries): admin1@ftdichip.com Site URL: http://www.ftdichip.com Shop URL:
Branch Office Taiwan Future Technology Devices International Limited (Taiwan) 16-1, Sec. Mincyuan East Road Neihu District Taipei Taiwan Tel: +886 8791 3570 Fax: +886 8791 3576 E-Mail (Sales): tw.sales1@ftdichip.com E-Mail (Support): tw.support1@ftdichip.com E-Mail (General Enquiries): tw.admin1@ftdichip.com Site URL: http://www.ftdichip.com
Branch Office Hillsboro, Oregon, Future Technology Devices International Limited (USA) 5285 Elam Young Parkway Suite B800 Hillsboro, 97124-6499 Tel: (503) 547-0988 Fax: (503) 547-0987 E-Mail (Sales): us.sales@ftdichip.com E-Mail (Support): us.support@ftdichip.com E-Mail (General Enquiries): us.admin@ftdichip.com Site URL: http://www.ftdichip.com
Agents Sales Representatives Please visit Sales Network page FTDI site contact details distributor(s) your country.
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