r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1150

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22 Flash Memory
After automatic writing is completed, the result can be checked through the FMPRSF bit in
FMRSTR (see section 22.7, Full Status Check).
Once an address is programmed, no additional data can be written to the address. Figure 22.6
shows a flowchart of the program command processing.
In the EW0 mode, the read status register mode is entered as soon as automatic writing starts, and
the status register can be read. The SR7 bit in the status register becomes 0 when automatic
writing starts and returns to 1 when writing is completed. In this case, the flash memory stays in
the read status register mode until a read array command is issued. After automatic writing is
completed, the result of writing can be checked by reading the status register.
Rev. 1.00 Sep. 19, 2008 Page 1120 of 1342
REJ09B0467-0100
Figure 22.6 Flowchart of Program Command Processing
Note: Write the command code and data to even addresses.
Write command code "H'xx41"
to the target write address.
the target write address.
End of programming
Full status check
Write data to
FMRDY = 1?
Start
YES
NO