On 'F407, RTC Backup Registers cannot be read using SWD if RDP Level 1 is set
In STM32F407 locked to RDP Level 1, with a battery on VBAT, I keep some (not critical) data in the RTC Backup Registers. In an attempt to investigate an incident, I tried to read out content of these registers using SWD. While I was able to read RTC ...