Ah, Thanks, I actually looked at the chip earlier. The datasheet says it's programmed with "SWDIO" + "SWCLK" pins. Those names normally refer to ARM's SWD sta

Ah, Thanks, I actually looked at the chip earlier. The datasheet says it's programmed with "SWDIO" + "SWCLK" pins. Those names normally refer to ARM's SWD standard. If - and that's a big if - they actually implemented proper SWD, the lower layer protocols would be known and it might be possible to get OpenOCD to work to program the chip. (Debugging is a much harder question though…)