Hey guys, I am currently trying to interface a 4x4 matrix keypad to 89c52. i have conntected the keypad to 89C52 column and row. Pin 12 is for column1, pin 13 for col 2, pin 14 for col 3, pin 15 for col 4, pin 16 for row 1, pin 17 for row 2, pin 18 for row 3, and pin 19 for row 4. does anyone have C code examples Please help me..Thank