M58WR064HT datasheet(21/111 Pages) NUMONYX

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M58WR064HT, M58WR064HB

Command interface - Standard commands

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5.8

Program/Erase Suspend Command

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

operation. A Bank Erase operation cannot be suspended.

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

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

be set to ‘1’. The command can be addressed to any bank.

During Program/Erase Suspend the Command Interface will accept the Program/Erase

Resume, Read Array (cannot read the erase-suspended block or the program-suspended

Word), Read Status Register, Read Electronic Signature and Read CFI Query commands.

Additionally, if the suspend operation was Erase then the Clear status Register, Program,

Block Lock, Block Lock-Down or Block Unlock commands will also be accepted. The block

being erased may be protected by issuing the Block Lock, Block Lock-Down or Protection

programmed correctly. When the Program/Erase Resume command is issued the operation

will complete. Refer to the 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 turns to VIL.

See Appendix C, Figure 22: Program Suspend & Resume Flowchart and Pseudo Code, and

Figure 24: Erase Suspend & Resume Flowchart and Pseudo Code, for flowcharts for using

the Program/Erase Suspend command.

5.9

Program/Erase Resume Command

The Program/Erase Resume command can be used to restart the Program/Erase Controller

after a Program/Erase Suspend command has paused it. One Bus Write cycle is required to

issue the command. The command can be written to any address.

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

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

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

was in Read Array mode subsequent read operations will output invalid data.

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

resumed until the programming operation has completed. It is possible to accumulate

suspend operations. For example: suspend an erase operation, start a programming

operation, suspend the programming operation then read the array. See Appendix C,

Figure 22: Program Suspend & Resume Flowchart and Pseudo Code, and Figure 24: Erase

Suspend & Resume Flowchart and Pseudo Code, for flowcharts for using the

Program/Erase Resume command.

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