参数资料
型号: MPC8250AZUPIBC
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 300 MHz, RISC PROCESSOR, PBGA480
封装: 37 X 37 MM, 1.70 MM HEIGHT, 1.27 MM PITCH, TBGA-480
文件页数: 16/73页
文件大小: 885K
代理商: MPC8250AZUPIBC
MOTOROLA
MPC8250 Hardware Specications
23
Clock Conguration Modes
Table 16 describes all possible clock congurations when using the MPC8250’s internal PCI bridge in host
mode.
Table 15. Clock Default Congurations in PCI Host Mode (MODCK_HI = 0000)
MODCK[1–3]1
1 Assumes MODCK_HI = 0000.
Input Clock
Frequency
(Bus)
CPM
Multiplication
Factor
CPM
Frequency
Core
Multiplication
Factor
Core
Frequency
PCI Division
Factor2
2 The frequency depends on the value of PCI_MODCK. If PCI_MODCK is high (logic ‘1’), the PCI frequency is
divided by 2 (33 instead of 66 MHz, etc.) Refer to Table 12.
PCI
Frequency2
000
66 MHz
2
133 MHz
2.5
166 MHz
2/4
66/33 MHz
001
66 MHz
2
133 MHz
3
200 MHz
2/4
66/33 MHz
010
66 MHz
2.5
166 MHz
3
200 MHz
3/6
55/28 MHz
011
66 MHz
2.5
166 MHz
3.5
233 MHz
3/6
55/28 MHz
100
66 MHz
2.5
166 MHz
4
266 MHz
3/6
55/28 MHz
101
66 MHz
3
200 MHz
3
200 MHz
3/6
66/33 MHz
110
66 MHz
3
200 MHz
3.5
233 MHz
3/6
66/33 MHz
111
66 MHz
3
200 MHz
4
266 MHz
3/6
66/33 MHz
Table 16. Clock Conguration Modes in PCI Host Mode
MODCK_H –
MODCK[1–3]
Input Clock
Frequency1
(Bus)
CPM
Multiplication
Factor
CPM
Frequency
Core
Multiplication
Factor
Core
Frequency
PCI Division
Factor2
PCI
Frequency2
0001_000
33 MHz
3
100 MHz
5
166 MHz
3/6
33/16 MHz
0001_001
33 MHz
3
100 MHz
6
200 MHz
3/6
33/16 MHz
0001_010
33 MHz
3
100 MHz
7
233 MHz
3/6
33/16 MHz
0001_011
33 MHz
3
100 MHz
8
266 MHz
3/6
33/16 MHz
0010_000
33 MHz
4
133 MHz
5
166 MHz
4/8
33/16 MHz
0010_001
33 MHz
4
133 MHz
6
200 MHz
4/8
33/16 MHz
0010_010
33 MHz
4
133 MHz
7
233 MHz
4/8
33/16 MHz
0010_011
33 MHz
4
133 MHz
8
266 MHz
4/8
33/16 MHz
0011_0003
33 MHz
5
166 MHz
5
166 MHz
5
33 MHz
0011_0013
33 MHz
5
166 MHz
6
200 MHz
5
33 MHz
0011_0103
33 MHz
5
166 MHz
7
233 MHz
5
33 MHz
0011_0113
33 MHz
5
166 MHz
8
266 MHz
5
33 MHz
0100_0003
33 MHz
6
200 MHz
5
166 MHz
6
33 MHz
0100_0013
33 MHz
6
200 MHz
6
200 MHz
6
33 MHz
0100_0103
33 MHz
6
200 MHz
7
233 MHz
6
33 MHz
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