Fujitsu MB90335 Series Hardware Manual page 506

MB90335 Series
Figure 22.3-4 Flash Memory Write-Protect, Write-Enable, Accidental-Write-Preventive Status Example
RST
SA0E
SA1E
SA2E
SA3E
Write-protected:
Write-enabled:
Accidental write preventive: "0" status. "0" has been written to the flash memory write control register
CM44-10137-6E
in the Flash Memory Write Control Register (FWR0/FWR1)
Register
Initialize
write
Write
Write
protected
enabled
Write
protected
accidental-write-prevent
Write
protected accidental-write-prevent
Write
protected Write enabled
"0" status. "0" has not been written to the flash memory write control
register (FWR0/FWR1), where you can write "1" to the register bit for each
sector to write-enable the sector. (after reset state)
"1" status. Data can be written to the corresponding sector.
(FWR0/FWR1), where the corresponding sector cannot be write-enabled
("1") even though "1" is written to the register bit.
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 22 DUAL OPERATION FLASH MEMORY
Register
Initialize
write
accidental-
write-
prevent
22.3 Registers of Flash Memory
Write
protected
Write
protected
Write
protected
Write
protected
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