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S3C4530A Datasheet(PDF) 28 Page - Samsung semiconductor

Part No. S3C4530A
Description  16/32-bit RISC microcontroller is a cost-effective, high-performance microcontroller
Download  432 Pages
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Maker  SAMSUNG [Samsung semiconductor]
Homepage  http://www.samsung.com/Products/Semiconductor
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S3C4530A Datasheet(HTML) 28 Page - Samsung semiconductor

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PROGRAMMER'S MODEL
S3C4530A
2-2
BIG-ENDIAN FORMAT
In Big-Endian format, the most significant byte of a word is stored at the lowest numbered byte and the least
significant byte at the highest numbered byte. Byte 0 of the memory system is therefore connected to data lines
31 through 24.
8
4
0
24
31
5
9
15
8
7
0
Word address
8
4
0
9
5
1
10
6
2
11
7
3
Higher address
Lower address
w
Most significant byte is at lowest address
w
Word is addressed by byte address of most signficant byte
Figure 2-1. Big-Endian Addresses of Bytes within Words
NOTE
The data locations in the external memory are different with Figure 2-1 in the S3C4620. Please refer to
the chapter 4, system manager.
LITTLE-ENDIAN FORMAT
In Little-Endian format, the lowest numbered byte in a word is considered the word
′s least significant byte, and
the highest numbered byte the most significant. Byte 0 of the memory system is therefore connected to data lines
7 through 0.
Word address
w
Most significant byte is at lowest address
w
Word is addressed by byte address of least signficant byte
8
4
0
24
31
16
23
15
8
7
0
11
7
3
10
6
2
9
5
1
8
4
0
Higher address
Lower address
Figure 2-2. Little-Endian Addresses of Bytes Words


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