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Erasing a sector from the internal memory block

Simon May

Hello,

I have a problem when erasing the internal memory block on an XC167CS-32F microcontroller.

I can erase sectors 0, 1, 2, and 3 OK. Sector 4 fails to erase, but then sectors 5, 6, and 7 erase OK.

I can write to all of the sectors (with the exception of sector 3).

The Keil uVision 'Flash->Erase' instruction DOES manage to do the erase correctly, so I know that my device is OK - it is just down to something that I am doing wrong.

Is it possible that one of the sectors (sector 4) has become 'protected', and if so, how do I go about reseting things so that the sector is no longer protected !

Thanks for you help,

Simon May

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