Fujitsu F2MC-16LX Hardware Manual page 505

Figure 26.6-2 Example of sector erase procedure for flash memory
N
Y
Sector Erase completed ?
Start of deletion
FMCS:WE(bit5)
Flash memory deletion
enabled
Delete command sequence
(1) FxAAAA
(2) Fx5554
(3) FxAAAA
(4) FxAAAA
(5) Fx5554
(6) Enter code to the
delete sector (30H)
Y
Any other delete
Internal address read 1
Internal address read 2
Toggle bit(DQ6)
Data 1 (DQ6) = data 2 (DQ6)
0
Timing limit(DQ5)
Internal address read 1
Internal address read 2
N Toggle bit(DQ6)
Data 1 (DQ6) = data 2 (DQ6)
Delete error
FMCS:WE(bit5)
Flash memory
deletion disabled
Delete completed
CHAPTER 26 2M BIT FLASH MEMORY
XXAA
XX55
XX80
XXAA
XX55
sector?
N
Y
N
1
Y
N
Last sector
Y
Check using hardware
sequence flag
Next sector
489