Fujitsu MB90895 Series Hardware Manual page 601

Figure 19.4-2 Flash Memory Write-Protect, Write-Enable, Accidental-Write-Preventive Status Example in
RST
SA0E
SA1E
SA2E
SA3E
Write-protected: 0 status. "0" has not been written to the flash memory write control register (FWR0/1),
where you can write "1" to the register bit for each sector to write-enable the sector. (after reset state)
Write-enabled: 1 status. Data can be written to the corresponding sector.
Accidental write preventive: 0 status. "0" has been written to the flash memory write control register
(FWR0/1), where the corresponding sector cannot be write-enabled ("1") even though "1" is written to the
register bit.
the Flash Memory Write Control Register (FWR0/1)
Register
Initialize
write
Write
Write
protected
enabled
Write
accidental-write-prevent
protected
Write
accidental-write-prevent
protected
Write
protected Write enabled
CHAPTER 19 512 KBIT FLASH MEMORY
Register
Initialize
write
accidental-
write-
prevent
Write
protected
Write
protected
Write
protected
Write
protected
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