HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 718

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

19. Flash Memory (F-ZTAT Version)
19.7
A setting in the RAM emulation register (RAMER) enables part of RAM to overlap with the flash
memory area so that data to be written to flash memory can be emulated in RAM in real time.
Emulation can be performed in user mode or user program mode. Figure 19.7 shows an example
of emulation of real-time flash memory programming.
1. Set RAMER to overlap part of RAM with the area for which real-time programming is
2. Emulation is performed using the overlapped RAM.
3. After the program data has been confirmed, the RAMS bit is cleared, thus releasing the RAM
4. The data written in the overlapped RAM is written into the flash memory area.
Rev.4.00 Mar. 27, 2008 Page 674 of 882
REJ09B0108-0400
required.
overlap.
Flash Memory Emulation in RAM
Figure 19.7 Flowchart for Flash Memory Emulation in RAM
No
Execute application program
Start of emulation program
End of emulation program
Write to flash memory
Write tuning data to
overlapped RAM
emulation block
Clear RAMER
Set RAMER
Tuning OK?
Yes