Messages in this thread | | | Subject | Re: What is the purpose of a GPIO controller | From | Ian Campbell <> | Date | Tue, 15 Feb 2005 14:08:33 +0000 |
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On Tue, 2005-02-15 at 19:19 +0530, krishna wrote: > Can any one tell me what is the purpose of GPIO controllers.
I'm not sure what question you are asking... GPIO controllers are clearly for the purpose of controlling GPIO pins. GPIO stands for general purpose i/o, so they are used for all sorts of things.
For example, hardware designers hook up all sorts of things to GPIO lines: input switches, reset lines to other chips on the board, leds, relays. I have boards where an i2c bus has been constructed using 2 gpio lines, another gpio is used to control the LCD backlight, etc, etc.
Ian.
-- Ian Campbell Current Noise: Opeth - To Rid the Disease
The pollution's at that awkward stage. Too thick to navigate and too thin to cultivate. -- Doug Sneyd
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