HD64F3039F18 Datasheet, PDF (624/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Appendix B Internal I/O Register Field
RAMCR—RAM Control Register
H'47
Flash Memory
Bit
7
—
Modes _{Initial value 1}
1 to 4 _{Read/Write —}
Modes Initial value ₁
5 to 7 Read/Write _—
6
5
4
3
2
1
0
—
—
— RAMS RAM2 RAM1 —
1
1
1
0
0
0
1
—
—
—
R
R
R
—
1
1
1
—
—
—
Reserved bits
0
0
0
1
R/W* R/W* R/W* —
RAM select, RAM2, RAM1
Bit 3 Bit 2 Bit 1
RAMS RAM2 RAM1
RAM Area
0 0/1 0/1 H'FFF000 to H'FFF3FF
1
0
0 H'000000 to H'0003FF
1 H'000400 to H'0007FF
1
0 H'000800 to H'000BFF
1 H'000C00 to H'000FFF
RAM Emulation Status
No emulation
Mapping RAM
Note:
This register is used only in the flash memory versions. Reading the corresponding address in
a mask ROM version will always return 1s, and writes to this address are disabled.
* In mode 6 (single-chip normal mode), flash memory emulation by RAM is not supported;
these bits can be modified, but must not be set to 1.
Rev.3.00 Mar. 26, 2007 Page 600 of 682
REJ09B0353-0300