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NRF52832 BPROT related

hello,BPROT does not work normally when i am debugging BPROT.

when i set CONFIG0 bit2 to 1,that is NRF_BPROT->CONFIG0 = 0x00000004,then i want to erase block 2(start address is 0x2000),but it can erase normally.it would appear hard fault in my opinion,because according NRF52832 Product Specification,"if an erase or write to a protected block is detected,the cpu will hard fault".

then i think BPROT/CLOCK/POWER share the same peripherals ID 0,it may be the problem.i do not use CLOCK/POWER,but the problem still  exists.

now,i do not know what is the reason of it?

thank you very much! best regards!

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