Fujitsu 8FX Hardware Manual page 577

MB95630H Series
Figure 26.5-2 Sample Procedure for Erasing Data from Sectors in Flash Memory
(6) Input code (0x30) to
Read internal address.
0
Erase specification has not
been added within 35 s.
Set remainder re-execution
flag, and terminate
MN702-00009-2v0-E
SWRE0
Enable/disable programming data to a sector.
(Write "0" to disable programming data or "1" to enable
programming data to a sector.)
erase sector.
DQ3
1
erase once
Erase error
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER 26 DUAL OPERATION FLASH MEMORY
26.5 Programming/Erasing Flash Memory
Start of erasing
FSR:WRE
Enable Flash memory erasing.
Erase command sequence
(1) 0xUAAA 0xAA
(2) 0x U554 0x55
(3) 0x UAAA 0x80
(4) 0xUAAA 0xAA
(5) 0xU554 0x55
YES
Erase any other
sectors?
NO
Read internal address 1.
Read internal address 2.
Toggle bit (DQ6)
Data 1 = Data 2
NO
0
Execution timeout
(DQ5)
1
Read internal address.
Read internal address.
NO
Toggle bit (DQ6)
Data 1 = Data 2
YES
Remainder
re-execution flag?
NO
FSR:WRE
Disable Flash memory erasing.
End of erasing
YES
YES
555