MK22FN128VLL10 to MK22FN512VLL12/MK22FX512AVLL12/MK22FN1M0AVLL12

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MK22FN128VLL10 to MK22FN512VLL12/MK22FX512AVLL12/MK22FN1M0AVLL12

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dougplymale
Contributor I

Hello,

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

Pin 12:

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?

Pin 13:

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,

Doug

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jeremyzhou
NXP Employee
NXP Employee

Hi Doug,

First of all, thank you for your interest in NXP Semiconductor products and the opportunity to serve for you.

In the reference manual whose link is as following illustrates the different USB circuit designing in the Chapter 3.9.1.2 USB Power Distribution, and you can refer to it for details.

http://cache.nxp.com/files/32bit/doc/ref_manual/K22P100M120SF5RM.pdf?fpsp=1&WT_TYPE=Reference%20Manu...
Have a great day,
Ping

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