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

17.26

Flash Memory Emulation in RAM

To provide real-time emulation in RAM of data that is to be written to the flash memory, a part of
the RAM can be overlaid on an area of flash memory (user MAT) that has been specified by the
RAM emulation register (RAMER). After the RAMER setting is made, the RAM is accessible in
both the user MAT area and as the RAM area that has been overlaid on the user MAT area. Such
emulation is possible in both user mode and user-program mode.
Figure 17-76 shows an example of the emulation of realtime programming of the user MAT area.
Start of emulation program
Write the data for tuning to
the overlaid RAM area
Execute application program
No
Cancel RAMER setting
Program the user MAT
with the emulated block
End of emulation program
Figure 17-76 Emulation of Flash Memory in RAM
Set RAMER
Tuning OK?
Yes
Rev. 5.00, 12/03, page 717 of 1088