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The second circuit attached earlier has all the connections which I have done There's none extra connection done by me....I'm providing common 5V Vcc to the circuit...
I think the problem is with LCD interfacing and not with keypad because before any input from keypad there are words which are supposed to be displayed on screen.
There's no resistor connected to keypad in your circuit. Can you please clarify it?
I have connected pin31 with VCC which is mentioned in your circuit but still facing the same problem.
this is full connection i have tried out.
The crystal value is 12MHz and capacitors used are of 33pF.
Pin3 of lcd is connected with potentiometer and I have also tried it with connecting the pin3 directly with VCC.
Still getting blank screen.
Can you please tell me about the floating signals...
When I connect my LCD to AT89C52, it's just showing a blank screen.
I have connected pin3 of lcd irectly to 5V and have also tried it with potentiometer but still getting the same results.
All the data lines of lcd are high, when checked with multimeter.
I'm using JHD162A lcd screen.
The...
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