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Using ST32F0308 Discovery to program external 20pin device

Question asked by field.rob on Dec 15, 2015
I'm using the board with its F030R8 processor to prototype code for the smaller F030F4 (20 Pin version)

Using the on board ST Link for programming external devices is not clear.
We have CN3 ( 6 way ) and CN2 (4 way with links ).
I am assuming CN3 is a full JTAG programming port, but why is it there because the F0 family only appears to have serial wire debug and programming.

For programming and debugging an external F0 processor, which connector and which pins are to be used.

I assume I can use this serial debug line to fully program the chip including any fuses etc.