Serial Asynchronous Flash Programming
Chapter 2 FME-FR Programmer
MCU-AN-300012-E-V13
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© Fujitsu Microelectronics Europe GmbH
Figure 7: Reset Signal Settings
The software now automatically writes a flash loader to the microcontroller, does a blank
check and erases the flash memory if necessary. After that the user application is
programmed to the embedded flash memory.
During this sequence the actual progress status can be seen by checked off steps on the
“Automatic” sheet and the messages below in the message box.
If the programming sequence is ended successfully, you will receive the output shown in
figure 7.
MB91F464A/H, MB91F465B/C/D/K/P/X, MB91F467B/C/D/M/P/S/T:
Addresses 0x14:8000 to 0x14:800F cannot be written in automatic mode.
MB91F469G:
Addresses 0x24:8000 to 0x24:800F cannot be written in automatic mode.
This is a built in security feature to prevent unintended writing to the Flash Security Vectors
and Boot Security Vectors. Otherwise it would be possible to secure flash content and to
lock the microcontroller for serial programming/reading/erasing by not being able to enter the
internal loader anymore. If you want to use these features explicitly, you have to program
these dedicated addresses by using the “Prog Word” Function of the step-by-step mode.
