Custom Microcontroller Design Verification And/Or Advice

I'm working on a custom microcontroller design based largely off of NXP's K64 FRDM boards as part of a larger project, and recently (despite the date on the schematic) finished what may be considered "version 1." As a brief background, this board will have a sibling layout embedded into a larger design (same PCB as the larger design), but I need to make sure that my design would actually work as intended before wasting time trying to embed the design into something else. Would someone be...

Custom Microcontroller Design Verification And/Or Advice