Datasheet

Section 22 ROM
Page 980 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
22.9 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 22.16 shows an example of emulation of real-time flash
memory programming.
Start of emulation program
End of emulation program
Tuning OK?
Yes
No
Set RAMER
Write tuning data to overlap
RAM
Execute application program
Clear RAMER
Write to flash memory emulation
block
Figure 22.16 Flowchart for Flash Memory Emulation in RAM