M58PR256J datasheet(28/114 Pages) STMICROELECTRONICS

28 / 114 page

Command interface

M58PR256J, M58PR512J

28/114

4.13

Program/Erase Suspend command

The Program/Erase Suspend command is used to pause a Program or Block Erase

operation. The command can be addressed to any bank.

The Program/Erase Resume command is required to restart the suspended operation.

One bus write cycle is required to issue the Program/Erase Suspend command. Once the

Program/Erase Controller has paused bits SR7, SR6 and/ or SR2 of the Status Register will

be set to ‘1’.

The following commands are accepted during Program/Erase Suspend:

–

Program/Erase Resume

–

Read Array (data from erase-suspended Block or program-suspended Word is not

valid)

–

Read Status Register

–

Read Electronic Signature

–

Read CFI Query

–

Read EFA

Additionally, if the suspended operation was a Block Erase then the following commands are

also accepted:

–

Clear Status Register

–

Program (except in erase-suspended Block)

–

Buffer Program (except in erase suspended Blocks)

–

Block Lock

–

Block Lock-Down

–

Block Unlock

–Program EFA

During an erase suspend the Block being erased can be protected by issuing the Block Lock

or Block Lock-Down commands. When the Program/Erase Resume command is issued the

operation will complete.

It is possible to accumulate multiple suspend operations. For example: suspend an erase

operation, start a program operation, suspend the program operation, then read the array.

If a Program command is issued during a Block Erase Suspend, the erase operation cannot

be resumed until the program operation has completed.

The Program/Erase Suspend command does not change the read mode of the banks. If the

suspended bank was in Read EFA, Read Status Register, Read Electronic signature or

Read CFI Query mode the bank remains in that mode and outputs the corresponding data.

Refer to Dual Operations section for detailed information about simultaneous operations

allowed during Program/Erase Suspend.

During a Program/Erase Suspend, the device can be placed in standby mode by taking Chip

Enable to VIH. Program/erase is aborted if Reset, RP, goes to VIL.

See Appendix C, Figure 22: Program Suspend & Resume flowchart and pseudo code, for

flowcharts for using the Program/Erase Suspend command.

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