580
RAMER—RAM Emulation Register
H'47
Flash Memory
Bit 3 Bit 2 Bit 1
RAMS RAM2 RAM1
RAM Area
0
1
*
0
1
Bit 0
RAM0
*
0
1
0
1
0
1
0
1
*
0
1
0
1
H'FFFFE000 to H'FFFFEFFF
H'00000000 to H'00000FFF
H'00001000 to H'00001FFF
H'00002000 to H'00002FFF
H'00003000 to H'00003FFF
H'00004000 to H'00004FFF
H'00005000 to H'00005FFF
H'00006000 to H'00006FFF
H'00007000 to H'00007FFF
RAM select, RAM2, RAM1, RAM0
Note:
*
: Don’t care.
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.
Bit
7
—
RAMS
6
5
4
3
2
1
0
—
—
—
RAM2
RAM1
RAM0
1
R
1
R
1
R
1
R
0
R/W
0
R/W
0
R/W
0
R/W
Initial value
R/W