We are planning to use a MK22FN128VLL10 (K22_100) in our control board application.
We would like to make this design compatible with some micros that provide larger memory options. We are planning to use the K22_120 series in the same footprint (LFQP100).
We have noticed that Pins 12 and 13 provide different power functions between the two families (K22_100 and K22_120).
Pin K22_100 K22_120
12 USBVDD VOUT33
13 NC VREGIN
For the K22_100 the pin is a power input. For the K22_120 the pin is a power output. What is the proper way of dealing with this difference between the processor families? Should this pin be left unconnected if I am using a 3.3V bus already? Do I still need to connect COUT if not using this output?
For the K22_100 the pin is a no connect with no bonding wire to the die (from what I was told). For the K22_120 it is a LDO regulator input. I am going to place a zero ohm resistor to this pin from my 3.3V bus. Do I need to power the LDO if I am not planning on using the output?
<extra info> For our application we are using 4 differential inputs and we found that we needed to move one differential pair (ADC0_Dx2) from 16& 17 to 3&4. </extra info>
Thank you for your time,