参数资料
型号: SM8521
厂商: Sharp Corporation
元件分类: DC/DC变换器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC转换器
文件页数: 45/56页
文件大小: 267K
代理商: SM8521
SM8521
- 45 -
MMU
The SM8521 supports an MMU used to external
memory area expansion.
Memory area 1000
H
-9FFF
H
, can be expanded to
2M-byte in each 8k-byte unit.
MMUx is selected depends on CPU address.
NOTE :
CPU can not access lower 4 k-byte of MMU0 because of
occupied by internal RAM and register file. On the other
hand, each 8 k-byte of external ROM is accessible as
DMA's address.
7
15
12
13
0
MMU0 (0000
H
-1FFF
H
)
MMU1 (2000
H
-3FFF
H
)
MMU2 (4000
H
-5FFF
H
)
MMU3 (6000
H
-7FFF
H
)
MMU4 (8000
H
-9FFF
H
)
CPU address
0
20
12
13
External memory address
0
Fig. 22 An Example of MMU Switching Flow and Mapping
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