PD78F0701Y_15 Datasheet, PDF (17/54 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78F0701Y
4. MEMORY SIZE SELECT REGISTER (IMS)
The memory size select register (IMS) selects the internal memory size.
This register is set by an 8-bit memory manipulation instruction.
RESET input sets IMS to CFH.
Caution Use IMS with its default value (CFH). Do not set any other values for the IMS.
Figure 4-1. Format of Memory Size Select Register (IMS)
Symbol ⁷
6
5
43
2
1
0
IMS RAM2 RAM1 RAM0 0 ROM3 ROM2 ROM1 ROM0
Address When reset R/W
FFF0H
CFH
R/W
ROM3 ROM2 ROM1 ROM0 ^{Internal ROM capacity selection}
1
1
1
1 60K bytes
Other settings
Not to be set
RAM2 RAM1 RAM0
Internal high-speed RAM
capacity selection
1
1
0 1,024 bytes
Other settings
Not to be set
5. INTERNAL EXPANSION RAM SIZE SELECT REGISTER (IXS)
The internal expansion RAM size select register (IXS) selects the internal expansion RAM capacity.
This register is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets IXS to 0CH.
Caution Set IXS to 08H as the default status of the program. Because IXS is set to 0CH at a reset, set it to
08H after a reset.
Symbol
7
IXS
0
Figure 5-1. Format of Internal Expansion RAM Size Select Register (IXS)
6
5
4
3
2
1
0
0
0 IXRAM4 IXRAM3 IXRAM2 IXRAM1 IXRAM0
Address When reset R/W
FFF4H
0CH
R/W
IXRAM4 IXRAM3 IXRAM2 IXRAM1 IXRAM0
Internal expansion RAM
capacity selection
0
1
0
0
0 2,048 bytes
Other settings
Not to be set
Preliminary Product Information U13563EJ2V0PM00
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