HD64F2357VF13 Datasheet, PDF (631/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

19.11 Flash Memory Emulation in RAM
19.11.1 Emulation in RAM
Making a setting in the RAM emulation register (RAMER) enables part of RAM to be overlapped onto the flash memory
area so that data to be written to flash memory can be emulated in RAM in real time. After the RAMER setting has been
made, accesses can be made from the flash memory area or the RAM area overlapping flash memory. Emulation can be
performed in user mode and user program mode. Figure 19-22 shows an example of emulation of real-time flash memory
programming.
Start emulation program
Set RAMER
Write tuning data to overlap
RAM
Execute application program
No
Tuning OK?
Yes
Clear RAMER
Write to flash memory emulation
block
End of emulation program
Figure 19-22 Flowchart for Flash Memory Emulation in RAM
Rev.6.00 Oct.28.2004 page 601 of 1016
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