W29GL256SH9T-TR Datasheet, PDF (34/88 Pages) Winbond – 256M-BIT 3.0-VOLT PARALLEL FLASH MEMORY WITH PAGE MODE

W29GL256S
The Write State Controller will return the device back to the erase-suspend mode after a program
operation has completed that was called from the erase suspend mode. The status of the program
operation can be determined by reading the Status Register, the same as in the standard program
operation.
In the event there is a program failure during an Erase Suspend operation, it is necessary to initiate a
Clear or Reset command to return the device to the Erase Suspended mode. Before trying another
program operation on the main memory array, the erase function will need to be resumed and
completed.
During Erase Suspend, valid accesses and commands:
 Any other non-suspended sector can be read.
 Any other non-suspended sector can be programmed.
 Status Read command
 Enter DPB MMO
 DPB Set
 DPB Clear
 DPB Status Read
 Exit MMO or Command Set Exit
 Erase Resume command
To resume the sector erase operation, an Erase Resume command must be executed. The device
will return back to erasing at which point the status bits will be updated. If another Erase Resume is
attempted it will be ignored. Once the device has resumed erase operation another Erase Suspend
command can be initiated.
While entered in an MMO, Erase Suspend and Resume is not supported. Likewise, entry into a MMO
while an erase suspend is not supported.
8.10 Blank Check
To confirm if a selected sector is erased a Blank Check command should be used. Reads to the main
memory array are not supported during a Blank Check operation. Trying to do so will return unknown
data. To execute a Blank Check operation on a specific Sector, write the address (SA)555 and the
data 33h after the Write State Controller is in the standby mode.
If the device is in a programming or erase mode of operation a Blank Check command cannot be
written.
Publication Release Date: Jul 02, 2014
Revision C
34