Esculapio Flores

I need to read a 3x4 matrix keypad from a GP32  A/D port pin

Discussion created by Esculapio Flores on Jun 28, 2006
Latest reply on Jun 30, 2006 by Esculapio Flores
Hi fellows!.
I just need some drawing to read a 3x4 (3 columns x 4 rows) matrix keypad from a AD port GP32 pin.I made some circuit but some keys do not work jus like cero,* and #.
Have I got to use two AD port pin to read this kind of keypad?.
Please someone who help me.
Thank you a lot!!
Have a nice day!.