h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 584
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
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Section 19 ROM
19.7
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. 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 onto the area for which real-time programming is
2. Emulation is performed using the overlapping RAM.
3. After the program data has been confirmed, the RAMS bit is cleared, thus releasing the RAM
4. The data written in the overlapping RAM is written into the flash memory space.
Rev. 2.00 Dec. 05, 2005 Page 546 of 724
REJ09B0200-0200
required.
overlap.
Flash Memory Emulation in RAM
Figure 19.7 Flowchart for Flash Memory Emulation in RAM
No
Execute application program
Write tuning data to overlap
Start of emulation program
End of emulation program
Write to flash memory
emulation block
Clear RAMER
Set RAMER
Tuning OK?
RAM
Yes
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