Fujitsu FR60 Hardware Manual page 581

Sector erase timer
(SETIMR)
0
Internal address read
Check with hardware
sequence flag
Erasure error
Figure 17.5-2 Sector Erase Procedure
Erase start Erase start
Enable erasure in flash
memory with WE (bit 1) in FLCR.
1
Erase command sequence
AAAAA (ROM1)/AAAAE (ROM2)
D5552 (ROM1)/D5556 (ROM2)
AAAAA (ROM1)/AAAAE (ROM2)
AAAAA (ROM1)/AAAAE (ROM2)
D5552 (ROM1)/D5556 (ROM2)
Enter code (30 ) to sector to be erased.
H
Yes
Is there another
sector to be erased?
Internal address read 1
Internal address read 2
Toggle bit (TOGGLE)
data 1 = data 2?
0
Time limit (TLOVER)
Internal address read 1
Internal address read 2
No
Toggle bit (TOGGLE)
data 1 = data 2?
Yes
Is final
sector erased?
(Bit 1)
Disable erasure in flash memory
Erase completion
AA
55
80
AA
55
No
Yes
No
1
No
Yes
Next sector
563