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Part III. The Hardware Interface
Table 8-10. Address and Size State Calculations
Size State
Address State [0Ð4]
Byte
x
x
2-Byte
x
x
x
x
x
x
x
x
x
x
3-Byte
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
4-Byte
x
x
x
x
x
x
5-Byte
x
x
6-Byte
x
x
x
x
7-Byte
x
x
8-Byte
x
x
x
x
x
x
x
x
8.4.3.8 Extended Transfer Mode
The MPC8260 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 PowerPC processors. The MPC8260 can generate 5-,
6-, 7-, 16-, or 24-byte extended transfers. These transactions are compatible with the 60x
8-20
Port Size
x
x
x
x
x
x
0
Byte
0
0
1
1
0
1
x
0
1
Half
x
x
0
0
0
0
Byte
0
0
1
1
0
0
1
0
1
0
0
0
Half
0
0
1
1
0
0
1
0
1
x
x
x
Word
x
0
0
Byte
x
0
0
Half
x
x
x
Word
0
1
1
Byte
0
1
0
Byte
0
1
0
Half
0
0
1
Byte
0
0
0
Byte
0
0
0
Half
0
0
0
Word
0
0
0
Double
MPC8260 PowerQUICC II UserÕs Manual
Next Size State
Next Address State [0Ð4]
Stop
Byte
x
Byte
x
Byte
x
Byte
x
Stop
2-Byte
x
2-Byte
x
2-Byte
x
2-Byte
x
Byte
x
2-Byte
x
Byte
x
2-Byte
x
Stop
3-Byte
x
2-Byte
x
Stop
4-Byte
x
5-Byte
x
4-Byte
x
6-Byte
x
7-Byte
x
6-Byte
x
4-Byte
x
Stop
x
x
x
1
x
0
1
0
x
1
1
0
x
x
1
0
x
0
0
1
x
0
1
0
x
1
0
1
x
1
1
0
x
0
1
0
x
0
1
0
x
1
1
0
x
1
1
0
x
x
0
1
x
x
1
0
x
1
0
0
x
0
1
1
x
1
0
0
x
0
1
0
x
0
0
1
x
0
1
0
x
1
0
0
MOTOROLA
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