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On LPC 2138 boards -SECTORS ERASING PROBLEM

I am downloading my application using LPC2000 v2.2.1 on to lpc2138 board with flash 512k.And insted of deleting entire device(flash) i am selecting particular sectors to be deleted(for example 0-14)but it is not allowing me to do and it is throwing an error "cannot communicate with test board" and at the down it is displaying "lpc2000 flash erase failed".

Please suggest me how to solve this problem

Thanks
Reddy

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0 ImPer Westermark over 16 years ago in reply to brahma reddy

I think you have to erase the full chip to clear the read-protect.
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0 ImPer Westermark over 16 years ago in reply to brahma reddy

I think you have to erase the full chip to clear the read-protect.
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0 brahma reddy over 16 years ago in reply to ImPer Westermark

westermark i tried by erasing all sectors and then tried to erase individual sectors at that time individual sector erase works fine,but my requirement is to erase only application stored sectors from 0-14 sectors and remaining should remain same,please suggest me how can i acheive this
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