Fujitsu F2MC-16LX Hardware Manual page 599

Figure 25.6-2 Example of Sector Erasing Procedure of Flash Memory
Sector
erase timer
DQ3
( )
YES
Internal address read
NO
Erase error
Erase start
FMCS : WE(bit5)
Flash memory erase
enabled
Erase command sequency
FxAAAA
XXAA
Fx5554
XX55
FxAAAA
XX80
FxAAAA
XXAA
Fx5554 XX55
Input to erase sector (30 )
H
Is there any
other sector?
NO
Internal address read 1
Internal address read 2
YES
Y toggle bit
(DQ6)
Data 1 (DQ6) =Data 2 (DQ6)
NO
Timing limit (DQ5)
Internal address read 1
Internal address read 2
Toggle bit
(DQ6)
Data 1 (DQ6) =Data 2 (DQ6)
YES
NO
Last sector
YES
FMCS : WE(bit5)
Flash memory erase
disabled
Check by hardware sequence
Erase complete
CHAPTER 25 3M-BIT FLASH MEMORY
Next sector
583