How to read the FLASH_SIZE register (0x08FFF80C) of the STM32H563 in OEMiROT_Boot?

Snaku · ‎2025-12-01

Hi,
I am using STM32H563 with OEMiROT_Boot example project, I got a problem to read the FLASH_SIZE register (0x08FFF80C).
I found two issues,
(1) the value of this register is 0 at begining of OEMiROT_Boot main() function.
(2) the register become not accessable after sau_init_cfg().

Snaku

Bubbles · ‎2025-12-01

Hi @Snaku,

it's not a register, it's a dedicated remapping of flash memory page that contains manufacturing and calibration data. It's not restricted by HW, so I assume it's the MPU settings that got in the way this time.

BR,

J

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