ur first requirement can be | Microcontroller › 8051 › Help is required in 4 x 20 lcd programming……. › ur first requirement can be May 5, 2011 at 7:29 pm #6086 SaLMAN Ahmed KhanParticipant ur first requirement can be complicated if u try to use lcd and keypad using that mux ic….put LCD ON PORT 0 and keypad on seperate port that is standard and both can be interface simultaneously…… try this instead of Mux Ic
