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Folks, May I ask you a simple question? May I use P0 port as the I/O(with the pull-up resistors) and address line (address coming out before the pull-up resistors) at the same time? Thank you.
May I ask you a simple question? May I use P0 port as the I/O(with the pull-up resistors) and address line (address coming out before the pull-up resistors) at the same time? The question is too simple I do not understand what you want. For all fetches from external program or data memory first the LSB of the address on P0 must be latched by ALE, then the data transfer takes place. If, however, you do not have any external memory, P0 is straight I/O Erik