Oct 17, 2006 #1 V vibeesh Newbie level 6 Joined Oct 16, 2006 Messages 12 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,359 i am going to interface..keypad with 89c51...my problem is my port pins are alredy uesd for diffrent purpose icant change the configuration...i need a key pad that produce serial output or RS232 compatible output....
i am going to interface..keypad with 89c51...my problem is my port pins are alredy uesd for diffrent purpose icant change the configuration...i need a key pad that produce serial output or RS232 compatible output....