DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 611

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

This LSI
This LSI
3. Flash memory initialization
1. Initial state
Application program
FWE assessment
FWE assessment
Transfer program
Transfer program
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.
Flash memory
Flash memory
Flash memory
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.
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 17.4 User Program Mode (Sample)
RAM
RAM
or USB
or USB
SCI
SCI
2. Programming/erase control program transfer
4. Writing new application program
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.
This LSI
This LSI
Application program
Rev.7.00 Dec. 24, 2008 Page 557 of 698
FWE assessment
Transfer program
FWE assessment
Transfer program
New application
Flash memory
Flash memory
Boot program
Boot program
(old version)
program
program
program
Host
New application
program
Host
erase control program
erase control program
Programming/
Programming/
Program execution state
REJ09B0074-0700
RAM
RAM
or USB
or USB
SCI
SCI