HD6433682 ETC, HD6433682 Datasheet - Page 126

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

Table 7.3
7.3.2
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.
Rev. 3.00, 05/03, page 96 of 472
Host Bit Rate
19,200 bps
9,600 bps
4,800 bps
2,400 bps
Figure 7.2 Programming/Erasing Flowchart Example in User Program Mode
Programming/Erasing in User Program Mode
System Clock Frequencies for which Automatic Adjustment of LSI Bit Rate is
Possible
Branch to user program/erase control
Transfer user program/erase control
Execute user program/erase control
Branch to flash memory application
program (flash memory rewrite)
program to RAM
program in RAM
Program/erase?
Reset-start
program
System Clock Frequency Range of LSI
16 to 20 MHz
8 to 16 MHz
4 to 16 MHz
2 to 16 MHz
Yes
No
Branch to flash memory application
program