Prometheus Assembly - MCU block

(a) - MCU

Component List

PCB Top Side

(b) - ground/power connections

Component List

PCB Top Side

(c) - minimal circuitry

Component List

PCB Top Side

PCB Bottom Side

Warning for Rev0.1! Be careful when soldering C42 and C43 - they should not be in contact!

(d) - pull-up resistors

Component List

PCB Top Side

PCB Bottom Side

(e) - crystal

Component List

PCB Top Side

The 1st pin is marked with a little dash:

(f) - LED and programmer connector

Component List

PCB Top Side

Connecting the programmer

Now check if MCU works using ST-Link/V2 programmer:

Make sure that an external +12V power supply is always connected when using the board:

SWD Connector pinout

The programmer connector pinout (from left to right): 1 - the first pin is not used 2 - GND (ground) 3 - NRST (reset) 4 - SWCLK 5 - SWDIO