Keypad interface to HC11

Article View: sci.electronics

Article #11579

#11579

From: DI3QC
Date: Wed, 11 Nov 1992 00:06

9 lines
777 bytes

     I am planning to interface a keypad to the io lines of an hc11. Does anyon
e have any suggestions on connecting a keypad. I was planning to scan the keypa
d by driving one of the rows hi and testing the columns. I was planning on test
ing this every 20ms. How would I take care of debouncing etc. Any suggestions.



                                         Alex Jeannopoulos

Technical Details

Message-ID: <92315.190637DI3QC@CUNYVM.BITNET>

Path:

arc1-ca.pugleaf.net!sparky!uunet!know!cass.ma02.bull.com!think.com!spool.mu.edu!sol.ctr.columbia.edu!hamblin.math.byu.edu!yvax.byu.edu!cunyvm!di3qc

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!sparky!uunet!know!cass.ma02.bull.com!think.com!spool.mu.edu!sol.ctr.columbia.edu!hamblin.math.byu.edu!yvax.byu.edu!cunyvm!di3qc
From: DI3QC@CUNYVM.BITNET
Newsgroups: sci.electronics
Subject: Keypad interface to HC11
Message-ID: <92315.190637DI3QC@CUNYVM.BITNET>
Date: 11 Nov 92 00:06:37 GMT
Organization: City University of New York/ University Computer Center
Lines: 9