HD64F36022 datasheet(111/384 Pages) RENESAS

111 / 384 page

Section 7 ROM

Rev. 4.00 Sep. 23, 2005 Page 85 of 354

REJ09B0025-0400

Table 7.3

System Clock Frequencies for which Automatic Adjustment of LSI Bit Rate is

Possible

Host Bit Rate

System Clock Frequency Range of LSI

19,200 bps

16 to 20 MHz

9,600 bps

8 to 16 MHz

4,800 bps

4 to 16 MHz

2,400 bps

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.

Yes

Program/erase?

Transfer user program/erase control

program to RAM

Reset-start

Branch to user program/erase control

program in RAM

Execute user program/erase control

program (flash memory rewrite)

Branch to flash memory application

program

Branch to flash memory application

program

Figure 7.2 Programming/Erasing Flowchart Example in User Program Mode

HD64F36022 Datasheet(PDF) 111 Page - Renesas Technology Corp