Locked MCU Chip STM32F205ZCT6 Program Restoration needs to crack stm32f205zct6 processor protective resistance system firstly then extract stm32f205zct6 microcontroller flash memory content;
This feature is available only on packages featuring the REGOFF pin. The regulator is disabled by holding REGOFF high. The regulator OFF mode allows to supply externally a V12 voltage source through VCAP_1 and VCAP_2 pins.
The two 2.2 µF ceramic capacitors must be replaced by two 100 nF decoupling capacitors. Refer to Figure 19: Power supply scheme.
When the regulator is OFF, there is no more internal monitoring on V12. An external power supply supervisor must be used to monitor the V12 of the logic power domain when breaking stm32f205rb flash memory protection. PA0 pin must be used for this purpose, and act as power-on reset on V12 power domain.
In regulator OFF mode, the following features are no more supported:
- PA0 cannot be used as a GPIO pin since it allows to reset the part of the 2 V logic power domain which is not reset by the NRST pin.
- As long as PA0 is kept low, the debug mode cannot be used at power-on As a consequence, PA0 and NRST pins must be managed separately if the debug connection at reset or pre-reset is required.
Regulator OFF / internal reset ON
On WLCSP64+2 package, this mode is activated by connecting REGOFF pin to VDD and IRROFF pin to VSS. On UFBGA176 package, only REGOFF must be connected to VDD (IRROFF not available). In this mode, VDD/VDDA minimum value is 1.8 V to recover stm32f205rc microcontroller flash memory heximal.
The regulator OFF / internal reset ON mode allows the user to supply externally a 1.2 V voltage source through VCAP_1 and VCAP_2 pins, in addition to VDD.