W29GL256SH9T-TR Datasheet, PDF (35/88 Pages) Winbond – 256M-BIT 3.0-VOLT PARALLEL FLASH MEMORY WITH PAGE MODE

W29GL256S
The Status Register can confirm if the device is still busy and when it has completed the Blank Check
operation, whether or not the sector is blank. Bit 7, Device Ready Bit of the Status Register will show
if a Blank Check is being performed by the device. Bit 5, Erase Status Bit of the Status Register will
indicate an erased sector when reading a ‘0’ or a non erased sector when reading a ‘1’. The device
will immediately halt the Blank Check operation and update the status as soon as any bit in the
selected sector is found not to be erased.
The Write State Controller will return to the Standby mode, as soon as the Blank Check is completed.
8.11 Enhanced Sector Protection Methods
8.11.1 Enhanced Sector Protection (ESP)
Enhanced Sector Protection is a method used to enable or disable program and erase operations, in
any or all sectors. Described in the section are the various methods of protecting data stored in the
main memory array. An outline of these methods is shown in the following figure.
Publication Release Date: Jul 02, 2014
Revision C
35