M58PR256LE datasheet(36/119 Pages) STMICROELECTRONICS

36 / 119 page

Command interface

M58PR256LE, M58PR512LE, M58PR001LE

36/119

During a suspend EFA block operation, the device can be placed in standby mode by taking

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

See Appendix C, Figure 22: Program suspend and resume flowchart and pseudocode and

Figure 24: Erase suspend and resume flowchart and pseudocode for flowcharts for using

the Suspend EFA Block command.

4.23

Resume EFA Block command

The Resume EFA Block command restarts the program or erase EFA block operation

suspended by the Suspend EFA Block command. One bus write cycle is required to issue

the command. The command can be issued to any address.

The Resume EFA Block command does not change the read mode of the banks.

If a Program EFA Block command is issued while an erase EFA block operation has been

suspended, then the erase operation cannot be resumed until the program operation has

completed.

See Appendix C, Figure 22: Program suspend and resume flowchart and pseudocode and

Figure 24: Erase suspend and resume flowchart and pseudocode for flowcharts for using

the Resume EFA Block command.

4.24

Lock EFA Block command

The Lock EFA Block command is used to lock an EFA block and prevent program or erase

operations from changing the data in it. All EFA blocks are locked after power-up or reset.

Two bus write cycles are required to issue the Lock EFA Block command.

●

The first bus cycle sets up the Lock EFA Block command.

●

The second bus cycle latches the Block address and locks the block.

The lock status can be monitored for each EFA block using the Read Electronic Signature

command.

Once set, the block lock bits remain set even after a hardware reset or a power-down/

power-up sequence. They are cleared by an Unlock EFA Block command.

Program or erase operations to a locked EFA block generates an error in the Status Register

(SR1=1).

Refer to Section 12: Block locking for a detailed explanation. See Appendix C, Figure 25:

Main array and EFA locking operations flowchart and pseudocode for a flowchart for using

the Lock EFA Block command.

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