SH7059 Datasheet, PDF (856/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

25. ROM (SH7059)
25.7 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 user mode and user program mode.
Figure 25.17 shows an example of the emulation of realtime programming of the user MAT area.
Start of emulation program
Set RAMER
Write the data for tuning to
the overlapped RAM area
Execute application program
No
Tuning OK?
Yes
Cancel RAMER setting
Program the emulation block
in the user MAT
End of emulation program
Figure 25.17 Emulation of Flash Memory in RAM
Rev.3.00 Mar. 12, 2008 Page 766 of 948
REJ09B0177-0300