HD64F38602R Datasheet, PDF (140/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 6 ROM
Table 6.3 System Clock Frequencies for which Automatic Adjustment of LSI Bit Rate is
Possible
Host Bit Rate
9,600 bps
4,800 bps
2,400 bps
System Clock Frequency Range of LSI
8 to 10 MHz
4 to 10 MHz
2 to 10 MHz
6.3.2 Programming/Erasure 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 programming/erasing control program. The user must
prepare the settings for branching to the user programming/erasing control program and means to
transfer programming data for on-board programming. The flash memory must contain the user
programming/erasing control program or a program that transfer the user programming/erasing
control program from external memory. Since the flash memory cannot be read during
programming/erasure, transfer the user programming/erasing control program to on-chip RAM, as
in boot mode. Figure 6.2 shows a sample procedure for programming/erasure in user program
mode. Prepare a user programming/erasing control program in accordance with the description in
section 6.4, Flash Memory Programming/Erasure.
The system clock oscillator must be used when programming or erasing the flash memory.
Starting after releasing reset state
Programming or erasure?
Yes
Transfer user programming/erasing
control program to RAM
No
Branch to flash memory application program
Branch to user programming/erasing
control program in RAM
Execute user programming/erasing control
program (flash memory programmed)
Branch to flash memory application program
Figure 6.2 Programming/Erasing Flowchart Example in User Program Mode
Rev. 3.00 May 15, 2007 Page 108 of 516
REJ09B0152-0300