How to access backup SRAM of STM32H7?

[star297 (Paul Staron)]

The STM32H743ZI MCU has 4 Kbytes of SRAM in Backup domain.

Is it possible to access this back up RAM?

I have found and tried this that works for the F429

How to access backup SRAM of STM32F4?

Datasheet of STM32F407 states that those MCUs have up to 4KB of backup SRAM. Is this part of SRAM being used in mbed? If not, how do we access it? Thanks.

But the RCC registers are a bit different on the H7

RCC->APB1ENR |= RCC_APB1ENR_PWREN;

is not found found in RCC_TypeDef.

Thank you.