LPC1769 Power/Voltage

[lpcware]

Content originally posted in LPCWare by Pinchi on Mon Jan 14 05:03:29 MST 2013
Hello All,

I am new to MC programming and I am using LPC1769. I have this doubt. Is it possible to power some pins at 3.3V and some pins at 5V/12V. Is there any way to configure or is it unable to have such a configuration at all? I would like to use most of the ports and I would like to power it with different voltages. Any help is appreciated. Thanks.

[lpcware]

Content originally posted in LPCWare by frame on Mon Jan 14 12:22:59 MST 2013

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Quote:
Is it possible to power some pins at 3.3V and some pins at 5V/12V.

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No.
Except you want to kill your MCU.
Stick to 3.3V. Some pins may accept 5V as [B]input[/B],
but never generate more than 3.3V output.

To interface to 5V/12V circuitry, you need levelshifter/driver circuitry.
3.3V are by far enough to drive the base of a bipolar transistor, for instance.