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You are here: Home / Replies / Firstly you need to

Firstly you need to

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Microcontroller › 8051 › AT89C51 START PROBLEM ..PLEASE NEED HELP.. › Firstly you need to

April 3, 2012 at 5:35 am #7385
Harsh Pandya
Participant

Firstly you need to understand , a controller works at faster speed compared to lcd so before initializing LCD you need to keep a delay of min 20ms in controller programming.

 

Secondly check foll voltages at controller pins :

 

Vcc – 5V

ALE – 1.68V

PIN 18 and 19 – (around) 2.18 to 2.8 V

 

and then tell me if the problem remains !!!

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