Suspend Sector Erase; Resume Sector Erase - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

C.6 Details of Flash Memory Programming/Erasing
C.6.5 Suspend Sector Erase
This section will describe how to issue the sector erase suspend command to suspend sector erase
operation in the flash memory. During sector erase, it is possible to read data from the sector which is not
being erased.
To suspend sector erase in flash memory, the sector erase suspend command found in command
sequence table (refer to Section C.4, Automatic Algorithm Initiation Method, Table C.4a) can be used and
needs to be sent continuously to the target sector in the flash memory.
During sector erase suspend command is executing, it is possible to read data from the sector that is not
being erased. This enables only reading from the sector but it is not possible to programming the sector.
This command is valid only during sector erasing time including the erase wait time, However, this
command will be ignored when chip erase is operating or programming is operated.
It will be implemented by issuing erase suspend code (B0H) to the flash memory. The address will be
specified to any address within the Flash Memory.
Sector erase suspend command will be ignored during another erase suspend command. If the sector
erase suspend command is issued during sector erase wait, sector erase wait will be ended suddenly and
sector erase will be suspended. If sector erase suspend command is issued when sector erase is
operating after sector erase wait, it will go to sector erase suspend status after maximum of 15 µS.
C.6.6 Resume Sector Erase
This section will describe how to issue the sector erase resume command to restart the suspended sector
erase in the flash memory.
To restart the suspended sector erase, the sector erase resume command found in command sequence
table (refer to Section C.4, Automatic Algorithm Initiation Method, Table C.4a) can be used and needs to
be sent continuously to the target sector in the flash memory.
Sector erase resume command is used to restart the sector erase operation form sector erase suspend
status. It will be implemented by issuing the sector erase resume code (30H) to the flash memory. The
address can be specified to any address within the flash memory. Sector erase resume command will be
ignored during sector erase is operating.
372 Appendix C: The Flash Memory in the MB90F583 MB90580 Series