Motorola MPC8260 User Manual
8-20
MPC8260 PowerQUICC II UserÕs Manual
MOTOROLA
Part III. The Hardware Interface
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
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
Table 8-10. Address and Size State Calculations
Size State
Address State [0Ð4]
Port Size
Next Size State
Next Address State [0Ð4]
Byte
x
x
x
x
x
x
Stop
2-Byte
x
x
x
x
0
Byte
Byte
x
x
x
x
1
x
x
0
0
1
Byte
x
x
0
1
0
x
x
1
0
1
Byte
x
x
1
1
0
x
x
x
0
1
Half
Byte
x
x
x
1
0
x
x
x
x
0
Stop
3-Byte
x
x
0
0
0
Byte
2-Byte
x
x
0
0
1
x
x
0
0
1
2-Byte
x
x
0
1
0
x
x
1
0
0
2-Byte
x
x
1
0
1
x
x
1
0
1
2-Byte
x
x
1
1
0
x
x
0
0
0
Half
Byte
x
x
0
1
0
x
x
0
0
1
2-Byte
x
x
0
1
0
x
x
1
0
0
Byte
x
x
1
1
0
x
x
1
0
1
2-Byte
x
x
1
1
0
x
x
x
x
x
Word
Stop
4-Byte
x
x
x
0
0
Byte
3-Byte
x
x
x
0
1
x
x
x
0
0
Half
2-Byte
x
x
x
1
0
x
x
x
x
x
Word
Stop
5-Byte
x
x
0
1
1
Byte
4-Byte
x
x
1
0
0
6-Byte
x
x
0
1
0
Byte
5-Byte
x
x
0
1
1
x
x
0
1
0
Half
4-Byte
x
x
1
0
0
7-Byte
x
x
0
0
1
Byte
6-Byte
x
x
0
1
0
8-Byte
x
x
0
0
0
Byte
7-Byte
x
x
0
0
1
x
x
0
0
0
Half
6-Byte
x
x
0
1
0
x
x
0
0
0
Word
4-Byte
x
x
1
0
0
x
x
0
0
0
Double
Stop