Fujitsu MB90335 Series Hardware Manual page 528

MB90335 Series
(6) Code input to erase sector (30
Internal address read
0
No erasing specification occurs
within 50 s additionally.
Set the flag for starting again
from the remainder and
suspend the erasing.
CM44-10137-6E
Figure 22.7-2 Example of Sector Erasing Procedure
FWR0/FWR1
Accidental write preventive function setting
(Accidental write preventive sector: 0,
writing sector
)
H
Sector erase timer
(DQ3)
1
μ
Erasing error
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 22 DUAL OPERATION FLASH MEMORY
22.7 Details of Programming/Erasing Flash Memory
Start
FMCS : WE (bit5)
Erasing enabled
Erase command sequence
(1) FFAAAA XXAA
H
(2) FF5554 XX55
H H
(3) FFAAAA XX80
H H
(4) FFAAAA XXAA
H
(5) FF5554 XX55
H H
YES
Is any other
erase sector?
NO
Internal address read 1
Internal address read 2
Toggle bit (DQ6)
Data 1 = Data 2
NO
0
Timing limit
(DQ5)
1
Internal address read 1
Internal address read 2
NO
Toggle bit (DQ6)
Data 1 = Data 2
YES
Set the flag
for starting again from
the remainder ?
NO
FMCS : WE (bit 5)
Erasing disabled
Completed
:1 )
H
H
YES
YES
507