Why must the RCC declared for GPIO

infoinfo973 · ‎2010-11-04

Posted on November 04, 2010 at 09:41

Andrew Neil · ‎2011-05-17

Posted on May 17, 2011 at 14:13

The GPIOs (in fact, all the peripherals) will not work unless their clocks are suitably configured & enabled!

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Tesla DeLorean · ‎2011-05-17

Posted on May 17, 2011 at 14:13

a) The design is synchronous

b) An unclocked CMOS circuit draws the least power

c) You only need to turn on the parts of the device you plan on using (at all, or currently)

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