0x422 STMicroelectronics MCU Cortex-M4 STM32F302xB-xC/STM32F303xB-xC/F358xx STM32F3 ARM 32-bit Cortex-M4 based device Embedded SRAM Storage 0x00 RWE Single Embedded Flash Storage The Flash memory interface manages CPU AHB I-Code and D-Code accesses to the Flash memory. It implements the erase and program Flash memory operations and the read and write protection mechanisms 0xFF RWE Single 0x8 Option Bytes Configuration RW Read Out Protection RDP Read protection option byte. The read protection is used to protect the software code stored in Flash memory. 0x0 0x8 RW Level 0, no protection or any value other than 0xAA and 0xCC: Level 1, read protection Level 2, chip protection User Configuration WDG_SW 0x10 0x1 RW Hardware watchdog Software watchdog nRST_STOP 0x11 0x1 RW Reset generated when entering Stop mode No reset generated nRST_STDBY 0x12 0x1 RW Reset generated when entering Standby mode No reset generated nBOOT1 Together with the input pad BOOT0, selects the Boot mode. If BOOT0=0, always boot from main flash memory regardless of nBoot1 value. 0x14 0x1 RW Boot from embedded SRAM when BOOT0=1 Boot from system flash when BOOT0=1 VDDA_MONITOR 0x15 0x1 RW VDDA power supply supervisor disabled VDDA power supply supervisor enabled SRAM_PE 0x16 0x1 RW RAM parity check enabled RAM parity check disabled User Data Data0 User data 0 (8-bit) 0x0 0x8 RW Data1 User data 1 (8-bit) 0x10 0x8 RW Write Protection nWRP0 0x0 0x8 RW Write protection active on this sector Write protection not active on this sector nWRP8 0x10 0x8 RW Write protection active on this sector Write protection not active on this sector nWRP16 0x0 0x8 RW Write protection active on this sector Write protection not active on this sector nWRP24 0x10 0x8 RW Write protection active on this sector Write protection not active on this sector