How do I re-program the STM32G0B1RET6 after I've done a "Full chip erase" in CubeProgrammer?

[Diogo Ferreira]

Hello i have a SKR board and the MCU was faulty. I swap the chip and tried to conect via SWD on CubeProgrammer but no success after i have can connect via usb but when i as to program by my mistake i erase full chip and after cannot conect again.

Is there some way to conect the chip or is broke?

[Tesla DeLorean]

>>Is there some way to connect the chip or is broke?

No idea, not my board, got a schematic?

The ST-LINK would likely need VCC-TARGET, GND, SWDIO, SWCLK and NRST.

Try Connect Under Reset options

Try Slower SWD clock speeds for CM0(+) parts

[Tesla DeLorean]

If BOOT0 pin is pulled HIGH, can it connect to PC via USB as "STM32 BOOT DEVICE" type of thing? If so FW could perhaps be pushed by USB/DFU mode in STM32 Cube Programmer.

Talk to the Vendor, Read ALL the instructions.

[Piranha · Accepted solution]

https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/tree/master/hardware/BTT%20SKR%20MINI%20E3%20V3.0/Hardware

Pull up BOOT0 (SWCLK) to VDD and connect in USB DFU mode.

By the way, looking at that schematics...

1. NRST has a 4,7k pull-up resistor - degrading.
2. SWDIO/SWCLK have a 10k pull-up/down resistors respectively - useless.
3. Crystal has a 1M resistor in parallel - degrading.
4. USB_P/N lines have a 27R resistors in series - degrading.
5. TMC2209 UART signals are connected directly, but should have a 1k series resistor for each driver instead of a single one for MCU - dangerous.
6. TMC2209 UART on MCU side is implemented with Tx and Rx pins instead of a single half-duplex pin - wastes pin.

[Diogo Ferreira]

Tanks for the help

I have can write the chip again.