r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1080

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

Section 21 Flash Memory
21.4
21.4.1
• The NMI and watchdog timer interrupts can be used because FLMCR1 is forcibly initialized
• The address-match interrupt cannot be used because the interrupt processing accesses data in
21.4.2
To set the FMCMDEN bit to 1, be sure to write 0 to the bit and then write 1 in a row. Make sure
that no interrupt, EXDMAC transfer, DTC transfer, or DMA transfer is generated between writing
0 and 1.
21.4.3
If the power-supply voltage falls during programming of the block that stores the programming
control program, the programming control program cannot be correctly modified and the flash
memory may not be programmed after that. In this case, use the on-board programming mode or
programmer mode instead.
21.4.4
The address to write a command code or data should be a multiple of four (0, 4, 8, C, ...).
21.4.5
Before entering the stop mode, set the FMCMDEN bit to 0 (CPU programming mode disabled),
disable the DMA transfer, and then make a transition to the software standby mode.
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REJ09B0466-0100
when an interrupt is generated; specify the destination address of each interrupt routine in the
fixed vector table. Flash memory programming is terminated when an NMI interrupt or a
watchdog timer interrupt occurs. In this case, reexecute the programming program after the
interrupt routine is completed.
the flash memory.
Notes on User Programming Mode
Prohibited Interrupts (EW0 Mode)
Access Method
Programming (EW0 Mode)
Writing Commands or Data
Software Standby Mode