Hi All,

I am developing a CFI based flash driver. I can query the device and get all sector/block information. I am having problems erasing sectors 1, 2, 3 and 4 (bottom 64-KB), please the flash geometry below. The problem is that when I attempt to erase sectors 1, 2, 3, OR 4 I end up erasing sectors 1-4 . Not sure why this is happening.

I am able to erase the remaining sectors, sectors 5 through 19 individually without problems.

Here is flash’s geometry. I would appreciate your expert opinion as how to avoid this or even as it why it is happening. Thanks in advance.

Device: ST’s M29w800DB, Bottom boot block.

Sector 1 0x00000 – 0x01fff Sector 2 0x02000 – 0x02fff Sector 3 0x03000 – 0x03fff Sector 4 0x04000 – 0x07fff -> First 64Kb boundary. Sector 5 0x08000 – 0x07fff -> All remaining sectors are 64 -Kb bulk sectors. …………………………………. Sector 19 0x78000 – 0x7ffff

- John

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