progam to interface 4×4 matrix keypad using m74c922 | Microcontroller › PIC › progam to interface 4×4 matrix keypad using m74c922 This topic has 0 replies, 1 voice, and was last updated 11 years, 4 months ago by khulekani. Viewing 1 post (of 1 total) Author Posts November 16, 2011 at 9:09 am #1403 khulekaniParticipant hey guys! i need help with my project, i need to interface a 4×4 keypad using a keypad encoder(MM74C922N) to a pic 16F873A, i need pic basic pro code. please help Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In