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Keypad on P0H

Since I am using P0H to connect my keypad, I am assuming that I don't require 4 pull-up resistors for 4 lines of columns on P0H0 to P0H3 due to internal pull-up resistors.

Hence four lines of row will be output while inpurs will be on columns. Should I capable of scanning the keypad correctly?

Please let me know asap

Regards

0 Andrew Jordan over 16 years ago

I just want to sure because I normally don't use pull resistors on columns in my AVR microcontroller project as ports have internal pull-resistors.
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0 Andrew Jordan over 16 years ago in reply to Andrew Jordan

Sorry for not specifying which microcontroller chip I am using. I am using XC161CJ. Suppose I want to read input of rows, should I use pull-up and down resistors?

MM
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