Temporary Sector Erase Stop - Fujitsu FR60 Hardware Manual

CHAPTER 17 FLASH MEMORY
17.5.5

Temporary Sector Erase Stop

This section explains how to issue temporary sector erase stop commands to
temporarily stop a sector erase operation in flash memory. Data can be read from a
sector not being erased by using this command.
■ Temporarily Stopping Sector Erase in Flash Memory
To temporarily stop a sector erase operation in flash memory, send the temporary sector erase stop
command listed in Table 17.4-1 to the target sector in flash memory.
Data can be read from a sector being erased by using the temporary sector erase stop command to
temporarily stop the erasure. Data can only be read from the sector; data cannot be written there. This
command is only effective during sector erasure that includes an erase wait period. It is ignored during chip
erase operation and write operation.
A sector erase operation is stopped temporarily by writing a temporary erase stop code (B0
where the temporary erase stop code is written should indicate an address in flash memory. A temporary
sector erase stop command issued during temporary erase stop status is ignored.
If a temporary sector erase stop command is entered during a sector erase wait period, the sector erase wait
is immediately canceled and erase operation in progress is stopped. If a temporary sector erase stop
command is entered during a sector erase operation after the sector erase wait period elapses, sector erase
operation is stopped temporarily after up to 20-µs elapse. Before issuing a sector erase temporary stop
command, wait for 20µs after issuing the sector erase command or sector erase resume command.
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