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CHAPTER 28 3M-BIT FLASH MEMORY
28.7.5
Suspending Sector Erase
This section describes the procedure for issuing the Sector Erase Suspend command
to suspend erasing of flash memory sectors. Data can be read from sectors that are not
being erased.
■ Suspending Erasing of Flash Memory Sectors
Erasing of flash memory sectors can be suspended by sending the Sector Erase Suspend command in the
command sequence table (see Table 28.5-1 in Section "28.5 Starting the Flash Memory Automatic
Algorithm") continuously to the target sector in the flash memory.
The Sector Erase Suspend command suspends the sector erase operation being executed and enables data to
be read from sectors that are not being erased. In this state, only reading is enabled; data cannot be written.
This command is valid only during sector erase operations that include the erase wait time. The command
will be ignored during chip erase or write operations.
This command is implemented by writing the erase suspend code (B0
address in the flash memory for the address. An Erase Suspend command issued again during erasing of
sectors will be ignored.
Entering the Sector Erase Suspend command during the sector erase wait period will immediately terminate
sector erase wait, cancel the erase operation, and set the erase stop state. Entering the Erase Suspend
command during the erase operation after the sector erase wait period has terminated will set the erase
suspend state after a maximum period of 20μs has elapsed. Sector Erase Suspend command should be
entered more than 20μs after Sector Erase command or Sector Erase Restart command is issued.
582
). At this time, specify an optional
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