M58WR064HT Datasheet, PDF (21/111 Pages) Numonyx B.V – 64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V supply Flash memories

M58WR064HT, M58WR064HB
Command interface - Standard commands
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
Register Program commands. Only the blocks not being erased may be read or
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 V_IH. Program/Erase is aborted if Reset turns to V_IL.
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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