Not long ago, Ken Boak very generously donated one of his assembled PCB designs to JeeLabs:
This is a break-out board for the STM32F746VG, an ARM Cortex M7 CPU with floating point and a whopping 1 MB flash + 320 KB RAM, all in a 100-pin SMD package.
Lots of I/O hardware, including USB and Ethernet, lots of analog I/O with three ADCs capable of millions of samples per second each, and a dual DAC.
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