home *** CD-ROM | disk | FTP | other *** search
- Path: news.joensuu.fi!not-for-mail
- From: pellikka@cc.joensuu.fi (Jarno Pellikka)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: IC pin numbering schemes?
- Date: 24 Jan 1996 12:01:26 +0200
- Organization: University of Joensuu
- Message-ID: <4e501m$9jm@cc.joensuu.fi>
- References: <4e338i$bbq@newsstand.cit.cornell.edu>
- NNTP-Posting-Host: cc.joensuu.fi
- X-Newsreader: TIN [version 1.2 PL2]
-
- Benjamin Kenobi (fkrj@crux4.cit.cornell.edu) wrote:
-
-
- : I'm about to make a modification on my A3640 board, and I need to know how
- : to identify pin numbers on IC's. I need to locate specific pins on the U200
- : IC on the board. It is a small, rectangular IC with 20 pins and one is
- : indicated (I assume this is pin #1). How do I count the pins, clockwise
- : or counter-clockwise? I would assume counter-clockwise because a clockwise
- : scheme would require pin #2 to be the first pin on the opposite row. Can
- : someone give me the info on this?
-
- : Thanks,
- : Dan
-
-
- : --
- : -----------------------------------------------------------------------------
- : ___
- : //// "Hey Joe, bring me that crowbar, will ya? I can't seem to
- : ___ //// get my disk out of this MAC!"
- : \\\\ ////
- : \\\////
- : \\\\/ AMIGA 4000/040 Intel outside, /\/\otorola within.
- : -----------------------------------------------------------------------------
-
-
- ---U---
- 1 -!. !- 20
- 2 -! !- 19
- 3 -! !- 18
- 4 -! !- 17
- ...................................
-
- Pin 1 may be marked with a dot also!
-
- Pin 1 is (sometimes marked with a dot also!)
- D
- ! !
-