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STM32H562II Datasheet(PDF) 22 Page - STMicroelectronics |
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STM32H562II Datasheet(HTML) 22 Page - STMicroelectronics |
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22 / 270 page  Functional overview STM32H562xx and STM32H563xx 22/270 DS14258 Rev 5 Option bytes are available to set the flash memory protection mechanisms: • Different product states for protecting memory content from debug access • Write protection (WRP) to protect areas against erasing and programming. Two areas per bank can be selected with 8-Kbyte granularity. • Sector group write-protection (WRPSG), protecting up to 32 groups of four sectors (32 Kbytes) per bank • Two secure-only areas (one per user flash memory bank). When enabled, this area is accessible only if the device operates in Secure-access mode • One HDP area per bank providing temporal isolation for startup code The whole non-volatile memory embeds the error correction code (ECC) feature supporting: • Single-error detection and correction • Double-error detection • ECC fail address report 3.4.1 FLASH security and protections Sensitive information is stored in the flash memory and it is important to protect the memory against unwanted operations such as reading confidential areas, illegal programming of immutable sectors, or malicious flash memory erasing. For that purpose the following protection mechanisms are implemented: • TrustZone backed watermark and block security protection • Temporal isolation protection (HDP) • Configuration protection • User flash memory write protection • Device non-volatile security life cycle and application boot state management • OTP locking Refer to the product reference manual for a detailed description of the security mechanisms. 3.4.2 FLASH privilege protection Each flash memory sector can be programmed on the fly as privileged or unprivileged. 3.5 Embedded SRAMs Four SRAMs are embedded in the STM32H562xx and STM32H563xx devices, each with specific features. SRAM1, SRAM2, and SRAM3 are the main SRAMs. These SRAMs are made of several blocks that can be powered down in Stop mode to reduce consumption: • SRAM1: 256 Kbytes • SRAM2: 64 Kbytes with ECC • SRAM3: 320 Kbytes with optional ECC (when enabled, 64 bytes are reserved for it) • BKPSRAM (backup SRAM): 4 Kbytes with optional ECC, can be retained in all low- power modes and when VDD is off in VBAT mode |
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