HD64F3670 RENESAS [Renesas Technology Corp], HD64F3670 Datasheet - Page 106
HD64F3670
Manufacturer Part Number
HD64F3670
Description
Hitachi Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD64F3670.pdf
(323 pages)
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Table 7.3 System Clock Frequencies for which Automatic Adjustment of LSI Bit Rate is
Host Bit Rate
19,200 bps
9,600 bps
4,800 bps
2,400 bps
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. 2.0, 03/02, page 82 of 298
Figure 7.2 Programming/Erasing Flowchart Example in User Program Mode
Programming/Erasing in User Program Mode
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 MHz
8 to 16 MHz
4 to 16 MHz
2 to 16 MHz
Yes
No
Branch to flash memory application
program
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