HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 706
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HD6417144
Manufacturer Part Number
HD6417144
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417144.pdf
(930 pages)
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Manufacturer:
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19. Flash Memory (F-ZTAT Version)
Rev.4.00 Mar. 27, 2008 Page 662 of 882
REJ09B0108-0400
1. Initial state
3. Flash memory initialization
The FWE assessment program that confirms that
user program mode has been entered, and the
program that will transfer the programming/erase
control program from flash memory to on-chip
RAM should be written into the flash memory by
the user beforehand. The programming/erase
control program should be prepared in the host
or in the flash memory.
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
Application program
Transfer program
Transfer program
FWE assessment
FWE assessment
Flash memory
Flash memory
Flash memory
Boot program
Boot program
(old version)
program
program
erase
erase control program
New application
New application
Programming/
program
program
Host
Host
erase control program
Programming/
Figure 19.4 User Program Mode
RAM
RAM
SCI
SCI
2. Programming/erase control program transfer
4. Writing new application program
This LSI
This LSI
When user program mode is entered, user
software confirms this fact, executes transfer
program in the flash memory, and transfers the
programming/erase control program to RAM.
Next, the new application program in the host is
written into the erased flash memory blocks. Do
not write to unerased blocks.
Application program
Transfer program
New application
FWE assessment
FWE assessment
Transfer program
Flash memory
Flash memory
Boot program
Boot program
(old version)
program
program
program
New application
program
Host
Host
erase control program
erase control program
Programming/
Programming/
Program execution state
RAM
RAM
SCI
SCI
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