PN7462 remap(vector table)

[youngseo]

Hello,

I want to use the PN7462 to create a bootloader (0x203000) and an application (0x204000).

Once I created a bootloader and jumped to the application (0x204000) area.

However, when application (0x204000) is executed, it stops.

I need to modify the vector table, but I do not know how to do it.

In the case of LPC series, it seems to move using SYSMEMREMAP or VTOR, but PN7462 does not seem to exist.

I am wondering how the PN7462 modifies the Vector Table.

[adriancano]

Hi,

Cortex M0 does not allow vector table to be remapped. Therefore, secondary bootloader has to be designed to redirect the processor to the handler listed in a vector table located in the applicat are of flash memory.

Please refer to AN10995 document and software that presents a Secondary Bootloader application for LPC1100.

https://www.nxp.com/docs/en/application-note/AN10995.zip 

Hope the information helps.

[youngseo]

Thank you for answer.

But, I am difficult to understand the sentence below.

" Therefore, secondary bootloader has to be desined to redirect the processor to the handler listed in a vector table located in the applicat are of flash memory."

Please give more specific explanation.

Best Regards.

[adriancano]

Hi, The information is part of the document I pointed, AN10995, please go through the document and you will find a better explanation of my sentence.

Regards