nRF52840 RESET VECTOR , VTOR

[Aylik]

Hi dear all !

the Question is very simply,

1. What the real RESET VECTOR (isr table) , ROM address for nRF52840 MCU ? I mean what happened each time after MCU CORE reset ? It depends of MCU supplier but NO ANY info in all docs nRF52840 found ( for example, for STM32F4xx MCU it is 0x08000000 or 0x20000000 depended of BOOT option)

2. Can I change it use VTOR CortexM4 Register or any other method BOOT option , as I use it for example with STM32Fxxx MCU ?

I use SD140-6.1.0 and now trying to implement some FW updating feature.

Is it correct as I'm feeling , after RESET, MCU ISR default address is 0x00000000 and then SoftDevice takes control of call USER APP as well USER ISR Table ? So, it is impossible to INSERT my own BOOT code BEFORE SD take control ? So, as I feel something like MBR is included to the SD FW and user cannot change it ?

Thanks all.

[Aylik]

I find the  0x00000000 is a real RESET VECTOR & ISR TABLE, the problem is MBR code of SD.

After some modification of MBR part of SD140 code manually use HEX editor, now work perfect, FW updating working success.

Issue closed.