M58PR512LE datasheet(29/119 Pages) STMICROELECTRONICS

29 / 119 page

M58PR256LE, M58PR512LE, M58PR001LE

Command interface

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4.10

Program/Erase Suspend command

The Program/Erase Suspend command pauses a program or block erase operation. The

command can be addressed to any bank and is required to restart a 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

are 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 is a block erase then the following commands are

also accepted:

–

Clear Status Register

–

Set Configuration 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 completes.

It is possible to accumulate multiple suspend operations. For example, it is possible to

suspend an erase operation, start a program operation, suspend the program operation,

and 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 Chapter 11 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 and resume flowchart and pseudocode for

flowcharts for using the Program/Erase Suspend command.

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