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FRDM-K66F - VREG_IN Connections

Question asked by Alexandru Stefan on Nov 13, 2018
Latest reply on Nov 13, 2018 by Mark Butcher

Hi,

 

We've been battling with issues regarding the HW connectivity for our K66-based boards for a few days now. While most (if not all) technical documents from NXP mention the need to have at least one of the VREG_IN pins connected to 5V, the FRDM-K66F board seemed to do without this. Notice the J16 having the DNP notation and searching fro VREGIN_K66 in the schematic returns nothing else besides this. However, I measured both sides of J16 and they both have 5V, so it seems the schematic is wrong. 

More importantly, what should the USB connections be, for a device that's going to be self-powered and never act as a host? (We're using USB1 High Speed). 


 

Thanks!

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