M29/Am29F002T/NT/B/NB Operation Notes

These chips only has seven sectors available. The value of bit 7(msb) in the Protect-Setting-Byte(PSB) is irrelevant, only the lower seven bits are used for setting/verifying the sector protection.

The master IC's protection status will not be used for any purpose. Instead, the PSB was used in the COPY and VERIFY command.

After the regular verify on memory array was completed, all the slave IC's protecting status will be compared with the PSB settings. A slave IC will be acknowledged as a good one only both comparing were passed. If the error LED turn-on at the last moment during verify action, it mostly can be said that only the protection state is different.