I believe DSR and DTR are a pair, not sure which one is an input to PC, whi= ch=20 one is an output from PC. Is there are way on Tera Term to set the output pin to Negative voltage, e.= g.=20 -5V~-10V? Funny N. Au Group Electronics, http://www.AuElectronics.com http://www.AuElectronics.com/products http://augroups.blogspot.com/ ________________________________ From: "William "Chops" Westfield" To: Microcontroller discussion list - Public. Sent: Fri, February 18, 2011 3:30:13 PM Subject: Re: [EE]Tera Term PC serial port DSR voltage change. On Feb 18, 2011, at 11:53 AM, Funny NYPD wrote: > I just found the Tera Term will set RS232's DSR pin at "8.9V" by =20 > default on my > desktop PC. > > Is there a way to have the Tera Term set DSR at "-8.9V"? Isn't DSR an input on the computer side? The PC is usually considered =20 the DTE... BillW --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .