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H8/3028F Datasheet(PDF) 617 Page - Renesas Technology Corp

Part # H8/3028F
Description  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
PDF  923 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3028F Datasheet(HTML) 617 Page - Renesas Technology Corp

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Rev. 2.00, 09/03, page 587 of 890
Example of User Program Mode Operation
Flash memory
H8/3028F-ZTAT
RAM
Host
Programming/erase
control program
SCI
Boot program
New application
program
Flash memory
H8/3028F-ZTAT
RAM
Host
SCI
New application
program
Flash memory
H8/3028F-ZTAT
RAM
Host
SCI
Flash memory
erase
Boot program
New application
program
Flash memory
H8/3028F-ZTAT
Program execution state
RAM
Host
SCI
Boot program
Programming/erase
control program
Boot program
FWE assessment program
Transfer program
Application program
(old version)
Application program
(old version)
FWE assessment program
Transfer program
New application
program
FWE assessment program
Transfer program
1. Initial state
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.
3. Flash memory initialization
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.
4. Writing new application program
Next, the new application program in the host is
written into the erased flash memory blocks.
Do not write to unerased blocks.
2. Programming/erase control program transfer
When user program mode is entered, user
software recognizes this fact, executes the
transfer program in the flash memory, and
transfers the programming/erase control
program to RAM.
FWE assessment program
Transfer program
Programming/erase
control program
Programming/erase
control program



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