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MK66FX1M0 USB Feature with external power. Do I need to connect VREGIN and VOUT33 Pins?

Question asked by christhomas on Feb 15, 2017
Latest reply on Mar 5, 2017 by christhomas

Hi all, 

 

I am using the MK66FX1M0VLQ18 microcontroller and want to use the USB feature. However, I don't to want to connect the USB 5V into VREGIN, instead want to power the microcontroller using an external LDO. For USB to still work, can I leave VREGIN unconnected and VOUT33 connected to 3.3V generated by my LDO. 

 

Thanks!

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