LCD in 4 bit mode with PIC16F877

  
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When you are using LCD in 4 bit mode you have to send data two times where in 8 bit mode you only have to write once, this ultimately keeps your microcontroller more busy with LCD. If you are doing only a few things with your microcontroller then its ok you will not have to face the problem of overhead, but this becomes critical when you are doing many tasks same time.
LCD in 4 bit mode with PIC16F877 - schematic




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