r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1079

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

21.3.3
Setting the FMCMDEN bit in FLMCR1 to 1 shifts the flash memory into the user programming
mode, in which commands can be accepted. Figure 21.3 shows how to set and clear the EW0
mode.
Programming and erasure are controlled through software commands. The flash memory state
after programming or erasure can be checked through FLMSTR or the status register.
Notes:
1.
2.
3.
To set the FMR01 bit to 1, write 0 to the bit and then write 1 to it
in a row.
Write to the FMR01 bit from an area outside the on-chip flash memory.
After a read array command, disable the CPU programming mode.
In the CPU programming mode, the PM10 and PM13 bits in PM1
become 1. Execute the programming control program in the on-chip RAM
or an external area that can be used while the PM13 bit is 1.
When using the 4-Mbyte mode while the PM13 bit is 1, do not use
the area where the access space is expanded (H'40000 to H'BFFFF).
EW0 mode processing procedures
EW0 Mode
Jump to the programming control program transferred
to an area outside the flash memory.
(The subsequent processing should be done by
the transferred programming control program.)
Transfer the programming control program
to an area outside the flash memory. *
Set the FLSHE in SYSCR.
Set the FMCMDENT in FLMCR1 to 1
Set the CBIDB in FLMCR to 1
Single-chip mode or
memory-expanded mode
Figure 21.3 Setting and Clearing EW0 Mode
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Programming control program*
Write 1 to the CBIDB bit (CPU programming mode
disabled).
Jump to a desired address in the flash memory.
Write 0 to the FMCMDEN bit and then write 1
Clear CBIDB to 0.
to it (user programming mode enabled).*
Execute a read array command.*
Execute software commands.
Section 21 Flash Memory
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