Bricked STM32F446 after unprotect

[VictorPr]

After testing Proprietary code readout protection (PCROP) features, STM32F4 got bricked.

Steps to reproduce:

• Enable SPRMOD for PCROP usage and enable PCROP bit 3 (Flash sector 3)
• Send an :unprotect:force DFU command
• STM32 will be bricked by now, not booting into USB DFU mode when pulling BOOT0 pin high

[VictorPr · Accepted solution]

Ok, solved.

For some reason, just plugin in USB while BOOT0 was tied high was not enough. Also had to pull NRST low to force reset and is working now.