【原创】NOR FLASH Block Unprotection

Some NOR flash have the protection&unprotection mechanism. On power up, all blocks in the device are protected. If we want to access the protected block, the Abort could be happen. To unprotect the a block, we must write the block protection/unprotection command sequence as the following:

wptr[0] = 0xF0;
wptr[0] = 0x60;
wptr[0] = 0x60;
wptr[0x42] = 0x60;

But i don't know the meaning of the digit 0x42.  Who can tell me?

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原文地址：https://www.cnblogs.com/hengfeng/p/1919467.html