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SST38VF6401B Datasheet, PDF (16/58 Pages) Microchip Technology – 64 Mbit (x16) Advanced Multi-Purpose Flash Plus
SST38VF6401B / SST38VF6402B / SST38VF6403B / SST38VF6404B
To verify whether the Irreversible Block Lock command
has already been issued, enter the Product ID mode
and read address 5FEH. If DQ0 = 0, then Irreversible
Block Lock has already been executed. When using
this feature to determine if a specific block is ROM, use
the NVPB Status Read.
DS25002B-page 16
Preliminary
 2013 Microchip Technology Inc.