HD6433694 Datasheet, PDF (121/432 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Table 7.3 System Clock Frequencies for which Automatic Adjustment of LSI Bit Rate is
Possible
Host Bit Rate
19,200 bps
9,600 bps
4,800 bps
2,400 bps
System Clock Frequency Range of LSI
16 to 20 MHz
8 to 16 MHz
4 to 16 MHz
2 to 16 MHz
7.3.2 Programming/Erasing in User Program Mode
On-board programming/erasing of an individual flash memory block can also be performed in user
program mode by branching to a user program/erase control program. The user must set branching
conditions and provide on-board means of supplying programming data. The flash memory must
contain the user program/erase control program or a program that provides the user program/erase
control program from external memory. As the flash memory itself cannot be read during
programming/erasing, transfer the user program/erase control program to on-chip RAM, as in boot
mode. Figure 7.2 shows a sample procedure for programming/erasing in user program mode.
Prepare a user program/erase control program in accordance with the description in section 7.4,
Flash Memory Programming/Erasing.
Reset-start
No
Program/erase?
Yes
Transfer user program/erase control
program to RAM
Branch to flash memory application
program
Branch to user program/erase control
program in RAM
Execute user program/erase control
program (flash memory rewrite)
Branch to flash memory application
program
Figure 7.2 Programming/Erasing Flowchart Example in User Program Mode
Rev. 4.00, 03/04, page 93 of 400