Unknown Memory Occupied after switching from SDK 13 to SDK 14.2

[VishnuGS]

Hello,

Below are the configuration setups of my firmware versions, 

	SDK	SoftDevice
FW Version 1	13.0	S 132 V 4.0.3
FW Version 2	14.2	S 132 V 5.0.0

FW Version 1 Memory Map 

Performed DFU to FW Version 2

I can see there is an increase of around 110 kB from 0x0005000 - 0x0006AD34 ( I could not understand what it is! )

I am very sure that memory is not because of increase in application code size.( Because I loaded hex image of Version 2 directly and confirmed this part of memory is free)

This problem has arrived only when I DFU from Version1 to Version 2. 

Can you please let me know what might be the problem is and how to delete this chunk on memory. 

Thank you.

 

[Vidar Berg]

Hello,

The bootloader uses this section as intermediate storage for dual-banked updates, please take a look at my answer to a similar question here: https://devzone.nordicsemi.com/f/nordic-q-a/58335/nrf52832-two-applications-in-memory-after-secure-buttonless-dfu-update 

[VishnuGS]

Thank you  Vidar Berg