Problem with DTR(20) ....serial port pic programmer. - Electronic Circuits Projects Diagrams Free

Charon102 · 19th January 2005, 08:18 PM

Hello

I want to build this circuit:

http://hyvatti.iki.fi/~jaakko/pic/jdm84ne3.png

It`s a pic programmer that is connected to the serial port. And this is also the problem that I have. I don`t know where to connect the DTR(20) wire . I mean the serial port has only 9 connectors. 20 is only possible at the parallel port, or the number indicates something else.

Any suggestions?

Greetings Charon102

zevon8 · 19th January 2005, 08:45 PM

It refers to the 25 pin version of the serial port. If you are using the 9 pin version, you will need to connect to the equivalent pin. Here is a cross reference:

http://www.aggsoft.com/rs232-pinout-...and-signal.htm

Charon102 · 21st January 2005, 07:57 PM

Thanks zevon8, that was very helpful. I didn`t know that there are two diffrent types of serial ports avaliable.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

19th January 2005, 08:18 PM	#1
Charon102	Problem with DTR(20) ....serial port pic programmer. Hello I want to build this circuit: http://hyvatti.iki.fi/~jaakko/pic/jdm84ne3.png It`s a pic programmer that is connected to the serial port. And this is also the problem that I have. I don`t know where to connect the DTR(20) wire . I mean the serial port has only 9 connectors. 20 is only possible at the parallel port, or the number indicates something else. Any suggestions? Greetings Charon102

19th January 2005, 08:45 PM	#2
zevon8	It refers to the 25 pin version of the serial port. If you are using the 9 pin version, you will need to connect to the equivalent pin. Here is a cross reference: http://www.aggsoft.com/rs232-pinout-...and-signal.htm

21st January 2005, 07:57 PM	#3
Charon102	Thanks zevon8, that was very helpful. I didn`t know that there are two diffrent types of serial ports avaliable.