M58BW016DT, M58BW016DB, M58BW016FT, M58BW016FB
Command interface
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program/erase controller status bit (bit 7) indicates that the program/erase controller is no
longer active, the program suspend status bit (bit 2) or the erase suspend status bit (bit 6)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 23: Program suspend & resume flowchart and
pseudocode, and Figure 25: 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 23: Program suspend & resume flowchart and
pseudocode, and Figure 25: Erase suspend & resume flowchart and pseudocode, for
suggested flowcharts on using the Program/Erase Resume command.
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MICRON [ MICRON TECHNOLOGY ]
