M58BW016DB datasheet(31/69 Pages) STMICROELECTRONICS

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M58BW016DT, M58BW016DB, M58BW016FT, M58BW016FB

Command interface

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4.8

Program/Erase Suspend command

The Program/Erase Suspend command is used to pause a program or erase operation. The

command will only be accepted during a program or erase operation. It can be issued at any

time during a program or erase operation. The command is ignored if the device is already

in Suspend mode.

One Bus Write cycle is required to issue the Program/Erase Suspend command and pause

the Program/Erase controller. Once the command is issued it is necessary to poll the

Program/Erase Controller Status bit (bit 7) to find out when the Program/Erase controller

has paused; no other commands will be accepted until the Program/Erase controller has

paused. After the Program/Erase controller has paused, the memory will continue to output

the Status Register until another command is issued.

During the polling period between issuing the Program/Erase Suspend command and the

Program/Erase controller pausing it is possible for the operation to complete. Once the

Program/Erase Controller Status bit (bit 7) indicates that the Program/Erase controller is no

longer active, the Program Suspend Status bit (bit 2) or the Erase Suspend Status bit (bit 6)

can be used to determine if the operation has completed or is suspended. For timing on the

delay between issuing the Program/Erase Suspend command and the Program/Erase

controller pausing see Table 10.

During Program/Erase Suspend the Read Memory Array, Read Status Register, Read

Electronic Signature, Read Query and Program/Erase Resume commands will be accepted

by the command interface. Additionally, if the suspended operation was Erase then the

Program and the Program Suspend commands will also be accepted. When a program

operation is completed inside a Block Erase Suspend the Read Memory Array command

must be issued to reset the device in Read mode, then the Erase Resume command can be

issued to complete the whole sequence. Only the blocks not being erased may be read or

programmed correctly.

See Appendix B: Flowcharts, Figure 22: Program Suspend & Resume flowchart and

pseudocode, and Figure 24: Erase Suspend & Resume flowchart and pseudocode, for

suggested flowcharts on using the Program/Erase Suspend command.

4.9

Program/Erase Resume command

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

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

issue the Program/Erase Resume command.

See Appendix B: Flowcharts, Figure 22: Program Suspend & Resume flowchart and

pseudocode, and Figure 24: Erase Suspend & Resume flowchart and pseudocode, for

suggested flowcharts on using the Program/Erase Resume command.

M58BW016DB Datasheet(PDF) 31 Page - STMicroelectronics