Title itself is explanatory. Also tell me what are the things I should take care of when I connect other IC's to it? With AVR's I never had to deal with these things. But now when dealing with ARM MCU's I think I have to consider these stuffs.
I will rephrase the question. Tell me, is it safe to connect LPC MCU to other common IC's like an AVR or L293D diver IC or 74xx series IC's etc without any interfacing circuits?