S113 v7.0.x - Memory Range Documentation Error?

[dbagan]

Hi,

I'm developing a Bootloader for the nRF52xx chip using the SoftDevice S113 v7.0.1 and SDK v17.0.0

Looking into the infocenter I've seen that there's a possible mistake on the documentation related to the Memory range useb by the S113 SoftDevice.

In the Memory layout table https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.0/lib_bootloader.html?cp=7_1_3_5_0_7#lib_bootloader_memory the SoftDevice addresses for the S113 seems to be not valid.

The start address is 0x0000 1000 and the end 0x0001 C000 and the size is 112kB, but with these addresses the size cannot be 112kB, it is 108kB, so IMO there are two possible options:

- The end address is not valid and instead of 0x0001 C000 should be 0x0001 D000 to guarantee the 112kB 

- The S113 size is not valid and instead of 112kB is 108kB

Do you know which option is correct?

Thank you very much

Regards,

David

[Jørgen Holmefjord]

Hi,

You are correct. They have forgotten to subtract the size of the MBR from the softdevice size. This is from the s113 release notes:

• The combined MBR and SoftDevice memory requirements for this version are as follows:
  • Flash: 112.0 kB (0x1C000 bytes)
  • RAM: 4.4 kB (0x1198 bytes).

Your second option is correct.

Best regards,
Jørgen

[dbagan]

Hi Jorgen,

Thank you for the clarification.

Regards,

David