> -----Original Message----- > From: Brian Guralnick [mailto:[EMAIL PROTECTED] > Sent: Friday, July 11, 2003 7:49 PM > To: Protel EDA Forum > Subject: [PEDA] OT: DB9 RS-232 serial port on peripherals. > > Hi, > > I was wondering what the pinouts of a peripheral's female > RS-232 DB9 connection. Basically, a device to be controlled > by a standard PC. I'm having a bit of a conflict concerning > the crossing of the RX & TX lines.
Brian Depends if you want to use a cross wired cable or not. 2 footprints I have used on some IC eval board designs, as control source & target peripheral, for use with a straight wired cable from PC to the target board, I have uploaded to http://www.proteluser.com/download for you, file name DB9 lib.rar You can see the different pinouts even if you cannot use them. My basic understanding is that for serial connection between male - female the cable should be straight wired, the connector pinout/footprint is different between connectors. For male-male the cable should be crossed and the connector pinout/footprint is the same on each device. I am sure if I got it wrong someone else will correct me :-) Hope you do not mind the direct email as well, I have been having trouble posting to this list. Best Regards John A. Ross RSD Communications Ltd 8 BorrowMeadow Road Springkerse Industrial Estate Stirling, Scotland FK7 7UW Tel +44 [0]1786 450572 Ext 225 (Office) Tel +44 [0]1786 450572 Ext 248 (Lab) Fax +44 [0]1786 474653 GSM +44 [0]7831 373727 Email [EMAIL PROTECTED] WWW http://www.rsd.tv ========================================== * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[EMAIL PROTECTED] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
