Fujitsu F2MCTM-16LX Hardware Manual page 556

CHAPTER 24 512K-BIT FLASH MEMORY
To determine whether automatic writing or chip erase is being executed, the hardware sequence flags can
be checked or the status can be determined from the RDY bit of the flash memory control status register
(FMCS) that indicates whether writing has been completed. After writing/erasing has terminated, the state
returns to the read/reset state. When creating a program, use one of the flags to confirm that automatic
writing/erasing has terminated. Then, perform the next processing operation, such as data read. The
following sections describe each hardware sequence flag separately. Table 24.6-2 lists the functions of the
hardware sequence flags.
Table 24.6-2 Hardware Sequence Flag Function
State
Write → Write completed
State change for
normal operation (write address specified)
Chip/selector erase → Erase completed
Abnormal operation Write
Chip erase
540
DQ7 DQ6
DQ7 → Toggle →
DATA:7 DATA:6
0 → 1 Toggle →
Stop
DQ7 Toggle
0 Toggle
DQ5
0 →
DATA:5
0 → 1
1
1