chrismicro
New Member
4X4 Keypad
A good programmer don't need to use interrupts, I use a 4x4 keypad on all 8 bits of portb and drive a LCD display with 6 bits of porta then I still have two AD channels and if you want it, I can give you a full function 101 keyboard with one wire, the best skipper is always ashore! what more documents do you want? there is a full description of PICDEV on the home page and that was published last knight!!
blueroomelectronics said:A 4x3 keypad normally uses 7 I/O pins. 4 outputs and 3 inputs. PORTB is handy because you can enable weak pullups, it even has a very handy interrupt / wakeup on change mode for bits 4 thru 7.
A good programmer don't need to use interrupts, I use a 4x4 keypad on all 8 bits of portb and drive a LCD display with 6 bits of porta then I still have two AD channels and if you want it, I can give you a full function 101 keyboard with one wire, the best skipper is always ashore! what more documents do you want? there is a full description of PICDEV on the home page and that was published last knight!!