>A speaker was wiring to RA0 of PIC16C57. As a typical speaker have an
>impedence of 8-ohm. I am wondering are I/Os of 16C57 could sufficiently
>drive the speaker. Am I missing anything?

It is a piezo speaker. Use a 220Ohm resistor in series with it if you use
read-modify-write instructions on this port.

Peter

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