SH7014 Datasheet, PDF (562/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

18. 128 kB Flash Memory (F-ZTAT)
18.9 Flash Memory 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 cannot 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 18.16 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 18.16 Flowchart for Flash Memory Emulation in RAM
Rev.5.00 Sep. 27, 2007 Page 528 of 716
REJ09B0398-0500