HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 621

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

1. Initial state
3. Flash memory initialization
(1) The program that will transfer the programming/erase
(2) The programming/erase control program should be
The programming/erase program in RAM is executed, and
the flash memory is initialized (to H'FF). Erasing can be
performed in block units, but not in byte units.
<This LSI>
<This LSI>
control program from flash memory to on-chip RAM
should be written into the flash memory by the user
beforehand.
prepared in the host or in the flash memory.
Transfer program
Transfer program
<Flash memory>
<Flash memory>
Flash memory
Boot program
Boot program
(old version)
Application
program
erase
erase control program
application program
application program
Programming/
<Host>
<Host>
New
New
erase control program
Figure 23.4 User Program Mode (Example)
Programming/
<RAM>
<RAM>
SCI
SCI
2. Programming/erase control program transfer
4. Writing new application program
The transfer program in the flash memory is executed and
the programming/erase control program is transferred to RAM.
Next, the new application program in the host is written into
the erased flash memory blocks. Do not write to unerased
blocks.
<This LSI>
<This LSI>
Transfer program
Transfer program
<Flash memory>
<Flash memory>
Boot program
Boot program
(old version)
Application
application
program
program
New
application program
Rev. 2.0, 08/02, page 581 of 788
<Host>
<Host>
New
erase control program
erase control program
Programming/
Programming/
Program execution state
<RAM>
<RAM>
SCI
SCI