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SM8521 Datasheet(PDF) 46 Page - Sharp Corporation

Part # SM8521
Description  8-Bit Single-Chip Microcomputer
PDF  56 Pages
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Manufacturer  SHARP [Sharp Corporation]
Direct Link  http://sharp-world.com/
Logo SHARP - Sharp Corporation

SM8521 Datasheet(HTML) 46 Page - Sharp Corporation

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SM8521
NOTES :
• At reset, MMU0 is disable and internal ROM is enable.
(1000H-1FFFH). At setting data into MMU0 once, internal
ROM becomes disable and MMU0 becomes enable.
• In case of changing to external ROM mode by putting
some data into MMU register, use Immediate R in "MOV"
instruction (MOV R, r or MOV R, R). Data in the next
internal ROM address will be fetched at the same time of
executing the instruction. Only one byte instruction can be
followed when setting data to MMU0 register.
A000H
6000H
8000H
4000H
1000H
2000H
0400H
0000H
Internal I/O / RAM
1FFFFFH
ROM/Flash
VRAM
E000H
FFFFH
Extend I/O
Extend RAM
External
ROM/Flash
000000H
4 k-byte
8 k-byte
8 k-byte
8 k-byte
8 k-byte
External
ROM/Flash
External
ROM/Flash
External
ROM/Flash
∗NOTES
A000H
6000H
8000H
4000H
1000H
2000H
0400H
0000H
Internal I/O / RAM
VRAM
E000H
FFFFH
Extend I/O
Extend RAM
External
ROM/Flash
4 k-byte
8 k-byte
8 k-byte
8 k-byte
A000H
6000H
8000H
4000H
1000H
2000H
0400H
0000H
Internal I/O / RAM
VRAM
E000H
FFFFH
Extend I/O
Extend RAM
External
ROM/Flash
8 k-byte
8 k-byte
8 k-byte
8 k-byte
In case of MMU0 is disable
(At reset)
In case of MMU0 is enable
External
ROM/Flash
External
ROM/Flash
External
ROM/Flash
External
ROM/Flash
External
ROM/Flash
Internal ROM
8 k-byte
External
ROM/Flash
4 k-byte
External ROM/Flash
Fig. 23
MMU Mapping
Fig. 24
Comparison Figure MMU 0 between Disable and Enable
- 46 -



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