Through ARM Locked MCU STM32F071VCT6 Protection Cracking, embedded firmware from stm32f071 microcontroller flash memory can be recovered, and copy the firmware heximal file to new MCU stm32f071.
Several prescalers and PLLs allow the configuration of the three AHB buses, the high- speed APB (APB2) and the low-speed APB (APB1) domains. The maximum frequency of the three AHB buses is 120 MHz and the maximum frequency the high-speed APB domains is 60 MHz.
The maximum allowed frequency of the low-speed APB domain is 30 MHz. The devices embed a dedicate PLL (PLLI2S) that allow them to achieve audio class performance by restoring arm microcontroller stm32f103 flash memory file. In this case, the I2S master clock can generate all standard sampling frequencies from 8 kHz to 192 kHz.
At startup, boot pins are used to select one out of three boot options:
Boot from user Flash memory
Boot from system memory
Boot from embedded SRAM
The boot loader is located in system memory. It is used to reprogram the Flash memory by using USART1 (PA9/PA10), USART3 (PC10/PC11 or PB10/PB11), CAN2 (PB5/PB13), USB OTG FS in Device mode (PA11/PA12) through DFU after recovering stm32f103c6 flash memory full content (device firmware upgrade).