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Decrypt ARM Microprocessor STM32F072R8 Program which has been extracted from stm32f072r8 chip’s flash memory, the locked bit of mcu stm32f072r8 has been broken by MCU reverse engineering technique;

The regulator has two operating modes and it is always enabled after reset.

• Main (MR) is used in normal operating mode (Run).
  • Low power (LPR) can be used in Stop mode where the power demand is reduced.

In Standby mode, it is put in power down mode. In this mode, the regulator output is in high impedance and the kernel circuitry is powered down, inducing zero consumption (but the contents of the registers and SRAM are lost).

The STM32F072x8/xB microcontrollers support three low-power modes to achieve the best compromise between low power consumption by clone stm32f070c6 flash memory to new microcomputer, short startup time and available wakeup sources:

·           Sleep mode

In Sleep mode, only the CPU is stopped. All peripherals continue to operate and can wake up the CPU when an interrupt/event occurs.

·           Stop mode

Stop mode achieves very low power consumption while retaining the content of SRAM and registers. All clocks in the 1.8 V domain are stopped, the PLL, the HSI RC and the HSE crystal oscillators are disabled in the process of cracking arm mcu stm32f070f6 flash memory. The voltage regulator can also be put either in normal or in low power mode.

The device can be woken up from Stop mode by any of the EXTI lines. The EXTI line source can be one of the 16 external lines, the PVD output, RTC, I2C1, USART1, USART2, USB, COMPx, VDDIO2 supply comparator or the CEC.

The CEC, USART1, USART2 and I2C1 peripherals can be configured to enable the HSI RC oscillator so as to get clock for processing incoming data. If this is used when the voltage regulator is put in low power mode, the regulator is first switched to normal mode before the clock is provided to the given peripheral.

·           Standby mode

The Standby mode is used to achieve the lowest power consumption. The internal voltage regulator is switched off so that the entire 1.8 V domain is powered off. The PLL, the HSI RC and the HSE crystal oscillators are also switched off. After entering Standby mode, SRAM and register contents are lost except for registers in the RTC domain and Standby circuitry.

The device exits Standby mode when an external reset (NRST pin), an IWDG reset, a rising edge on the WKUP pins, or an RTC event occurs.

Note:           The RTC, the IWDG, and the corresponding clock sources are not stopped by entering Stop or Standby mode.