I'm using portb (pic16f877a),its must add pull up resistor for rs?
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Re: Lcd 16x2 circuit and sample program...
I'm using portb (pic16f877a),its must add pull up resistor for rs?
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Re: Lcd 16x2 circuit and sample program...
Why not show your code and connections? Then someone may be able to help you.
Dave
Always wear safety glasses while programming.
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Re: Lcd 16x2 circuit and sample program...
If you use the MCLR pin, then yes. The example in the book does. The MCLR pin of the PIC (generally) can not drive a load and therefor requires a pull up resistor to provide that function. Other pins CAN drive a load and do NOT require a pull up resistor.
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Re: Lcd 16x2 circuit and sample program...
Some devices have internal soft pullups on port B that must be enabled. I'm not sure yours is one or them - check the datasheet.
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