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33.7.5
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 33.5-1 Command sequence table in Section 33.5 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, reading as well as writing is enabled, further
erase operations are forbidden; 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 (B0h). At this time, specify an optional
address in a flash sector that is to be suspended for the address. Further Erase Suspend commands before an
Erase Resume command 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 15µs has elapsed.
CHAPTER 33 FLASH MEMORY
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