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MPC8280 bảng dữ liệu(PDF) 294 Page - Freescale Semiconductor, Inc

tên linh kiện MPC8280
Giải thích chi tiết về linh kiện  PowerQUICC??II Family Reference Manual
PDF  1386 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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MPC8280 bảng dữ liệu(HTML) 294 Page - Freescale Semiconductor, Inc

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The 60x Bus
MPC8280 PowerQUICC II Family Reference Manual, Rev. 1
8-18
Freescale Semiconductor
state machine. Note that the address and size states are for internal use and are not transferred on the
address or TSIZ pins. Extended transactions (16- and 24-byte) are not described here but can be
determined by extending this table for 9-, 10-, 16-, 23-, and 24-byte transactions.
8.4.3.8
Extended Transfer Mode
The MPC8280 supports an extended transfer mode that improves bus performance. This should not be
confused with the extended bus protocol used to support direct-store operations supported in some earlier
processors that implement the PowerPC architecture. The MPC8280 can generate 5-, 6-, 7-, 16-, or 24-byte
Table 8-9. Address and Size State Calculations
Size State
Address State [0–4]
Port Size
Next Size State
Next Address State [0–4]
Byte
xxxx
x
x
Stop
2-Byte
xxxx
0
Byte
Byte
x
x
x
x
1
x
x
0
0
1
Byte
x
x
010
x
x
1
0
1
Byte
x
x
110
xxx
0
1
Half
Byte
x
x
x
1
0
xxxx
0
Stop
3-Byte
x
x
0
0
0
Byte
2-Byte
x
x
001
x
x
0
0
1
2-Byte
x
x
010
x
x
1
0
0
2-Byte
x
x
101
x
x
1
0
1
2-Byte
x
x
110
x
x
0
0
0
Half
Byte
x
x
010
x
x
0
0
1
2-Byte
x
x
010
x
x
1
0
0
Byte
x
x
110
x
x
1
0
1
2-Byte
x
x
110
xxxx
x
Word
Stop
4-Byte
x
x
x
0
0
Byte
3-Byte
x
x
x
0
1
xxx
0
0
Half
2-Byte
x
x
x
1
0
xxxx
x
Word
Stop
5-Byte
x
x
0
1
1
Byte
4-Byte
x
x
100
6-Byte
x
x
0
1
0
Byte
5-Byte
x
x
011
x
x
0
1
0
Half
4-Byte
x
x
100
7-Byte
x
x
0
0
1
Byte
6-Byte
x
x
010
8-Byte
x
x
0
0
0
Byte
7-Byte
x
x
001
x
x
0
0
0
Half
6-Byte
x
x
010
x
x
0
0
0
Word
4-Byte
x
x
100
x
x
0
0
0
Double
Stop



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