upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 452
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upd78f0730
Manufacturer Part Number
upd78f0730
Description
8-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0730.pdf
(518 pages)
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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
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