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PICList Thread
'Radio Shack 49-452 Keypad'
1997\02\16@143549 by Dwain Coufal

Slightly off topic:

Does/Has anyone interfaced a PIC chip to a Radio Shack Digital Keypad model
# 49-452?  The back of the keypad has +/- power connections, 4 possible
address settings, and a Serial Data 1 and 2.  Is this true serial data?
Which is input and which is output?  Or is the data flow bidrectional?

I want to interface this keypad with a PIC 16c84 to control a home alarm
system.  It seems like it would be easier to use this keypad than to create

Any help is greatly appreciated.


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