Flash Memory Emulation In Ram - Renesas H8S/2319 series Hardware Manual

17.9

Flash Memory Emulation in RAM

17.9.1 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 17-18 shows an example of emulation of real-time flash memory
programming.
Note: Flash memory emulation by RAM is not supported in the H8S/2314 F-ZTAT.
Figure 17-18 Flowchart for Flash Memory Emulation in RAM
Start of 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
Rev. 5.00, 12/03, page 591 of 1088