HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 802

• Manufacturer Part Number: HD6412332
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

19.9.2
An example in which flash memory block area EB1 is overlapped is shown below.
Example in which Flash Memory Block Area EB1 is Overlapped
1. Set bits RAMS, RAM2, RAM1, and RAM0 in RAMER to 1, 0, 0, 1, to overlap part of RAM
2. Real-time programming is performed using the overlapping RAM.
3. After the program data has been confirmed, the RAMS bit is cleared, releasing RAM overlap.
4. The data written in the overlapping RAM is written into the flash memory space (EB1).
Notes: 1. When the RAMS bit is set to 1, program/erase protection is enabled for all blocks
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onto the area (EB1) for which real-time programming is required.
H'5FFFF
RAM Overlap
H'00000
H'01000
H'02000
H'03000
H'04000
H'05000
H'06000
H'07000
H'08000
regardless of the value of RAM2, RAM1, and RAM0 (emulation protection). In this
state, setting the P or E bit in flash memory control register 1 (FLMCR1) will not cause
Figure 19.18 Example of RAM Overlap Operation
Flash memory
EB8 to EB13
EB0
EB1
EB2
EB3
EB4
EB5
EB6
EB7
This area can be accessed
from both the RAM area
and flash memory area
On-chip RAM
H'FFDC00
H'FFEBFF
H'FFFBFF