RM0455 Documentation conventions
1.3 Glossary
This section gives a brief definition of acronyms and abbreviations used in this document:
• Word : data of 32-bit length.
• Half-word : data of 16-bit length.
• Byte : data of 8-bit length.
• Double word : data of 64-bit length.
• Flash word: data of 256-bit length
• IAP (in-application programming) : IAP is the ability to re-program the Flash memory of a microcontroller while the user program is running.
• ICP (in-circuit programming) : ICP is the ability to program the Flash memory of a microcontroller using the JTAG protocol, the SWD protocol or the bootloader while the device is mounted on the user application board.
• Option bytes : product configuration bits stored in the Flash memory.
• AHB : advanced high-performance bus.
• AXI : Advanced extensible interface protocol.
• PCROP : proprietary code readout protection.
• RDP : readout protection.
• CD : CPU power and clock domain.
• SRD : Smart Run power and clock domain.
For availability of peripherals and their number across all sales types, refer to the particular device datasheet.
For security feature availability please refer to the table below:
Table 1. Availability of security features
Security feature
Embedded Flash memory (FLASH):
– Flash Secure-only area
Security memory management:
– Secure access mode
– Root secure services (RSS)
On-the-fly decryption engine
(OTFDEC)
Cryptographic processor (CRYP)
Hash processor (HASH)
STM32H7B0xB
Available
STM32H7B3xx
Available
STM32H7A3xx
Not available
RM0455 Rev 8
99/2973
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