M58PR256J datasheet(35/114 Pages) STMICROELECTRONICS

35 / 114 page

M58PR256J, M58PR512J

Command interface

35/114

4.26

Resume EFA Block command

The Resume EFA Block command is used to restart 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 & Resume flowchart and pseudo code and

Figure 24: Erase Suspend & Resume flowchart and pseudo code, for flowcharts for using

the Resume EFA Block command.

4.27

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

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

Main Array and EFA locking operations flowchart and pseudo code, for a flowchart for using

the Lock EFA Block command.

4.28

Unlock EFA Block command

The Unlock EFA Block command is used to unlock an EFA Block, allowing the EFA Block to

be programmed or erased.

Two Bus Write cycles are required to issue the Unlock EFA Block command.

●

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

●

The second Bus Write cycle latches the Block address and unlocks the Block.

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

command.

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

Main Array and EFA locking operations flowchart and pseudo code, for a flowchart for using

the Unlock EFA Block command.

M58PR256J Datasheet(PDF) 35 Page - STMicroelectronics

M58PR256J Datasheet(HTML) 35 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Descarga

Enlace URL