upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 452

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

19.2 Internal Expansion RAM Size Switching Register
(IXS).
452
The internal expansion RAM capacity can be selected using the internal expansion RAM size switching register
IXS is set by an 8-bit memory manipulation instruction.
Reset signal generation sets IXS to 0CH.
Caution Be sure to set to 08H after a reset release.
Address: FFF4H
Symbol
IXS
Figure 19-2. Format of Internal Expansion RAM Size Switching Register (IXS)
IXRAM4
7
0
0
After reset: 0CH
IXRAM3
6
0
1
Other than above
R/W
Preliminary User’s Manual U19014EJ1V0UD
CHAPTER 19 FLASH MEMORY
IXRAM2
5
0
0
IXRAM4
IXRAM1
4
0
IXRAM3
IXRAM0
3
0
Internal expansion RAM capacity selection
2048 bytes
Setting prohibited
IXRAM2
2
IXRAM1
1
IXRAM0
0