S29GL01GS datasheet(34/104 Pages) SPANSION

34 / 104 page

GL-S MirrorBit® Family

S29GL_128S_01GS_00_06 March 16, 2012

Da ta

Sh e e t

5.3.5

Erase Suspend / Erase Resume

The Erase Suspend command allows the system to interrupt a sector erase operation and then read data

from, or program data to, the main flash array. This command is valid only during sector erase or program

operation. The Erase Suspend command is ignored if written during the chip erase operation.

When the Erase Suspend command is written during the sector erase operation, the device requires a

maximum of tESL (erase suspend latency) to suspend the erase operation and update the status bits.

After the erase operation has been suspended, the part enters the erase-suspend mode. The system can

read data from or program data to the main flash array. Reading at any address within erase-suspended

sectors produces undetermined data. The system can determine if a sector is actively erasing or is erase-

suspended by reading the Status Register or using Data Polling. Refer to Status Register on page 37 for

information on these status bits. Refer to Data Polling Status on page 38 for more information.

After an erase-suspended program operation is complete, the EAC returns to the erase-suspend state. The

system can determine the status of the program operation by reading the Status Register, just as in the

standard program operation.

If a program failure occurs during erase suspend the Clear or Reset commands will return the device to the

erase suspended state. Erase will need to be resumed and completed before again trying to program the

memory array.

Accesses and commands that are valid during Erase Suspend are:

 Read to any other non-suspended sector

 Program to any other non-suspended sector

 Status Read command

 Enter DYB ASO

 DYB Set

 DYB Clear

 DYB Status Read

 Exit ASO or Command Set Exit

 Erase Resume command

To resume the sector erase operation, the system must write the Erase Resume command. The device will

revert to erasing and the status bits will be updated. Further writes of the Resume command are ignored.

Another Erase Suspend command can be written after the chip has resumed erasing.

Erase suspend and resume is not supported while entered in an ASO. While in erase suspend entry into ASO

is not supported.

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