参数资料
型号: MPC8250ACVRLHDX
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 250 MHz, RISC PROCESSOR, PBGA516
封装: 27 X 27 MM, 2.25 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-516
文件页数: 19/62页
文件大小: 945K
代理商: MPC8250ACVRLHDX
MPC8250 Hardware Specifications, Rev. 2
26
Freescale Semiconductor
Clock Configuration Modes
3.2.2
PCI Agent Mode
The frequencies listed in Table 17 are for the purpose of illustration only. Users must select a mode and
input bus frequency so that the resulting configuration does not exceed the frequency rating of the user’s
device.
1001_001
66 MHz
3.5
233 MHz
3
200 MHz
4/8
58/29 MHz
1001_010
66 MHz
3.5
233 MHz
3.5
233 MHz
4/8
58/29 MHz
1001_011
66 MHz
3.5
233 MHz
4
266 MHz
4/8
58/29 MHz
1001_100
66 MHz
3.5
233 MHz
4.5
300 MHz
4/8
58/29 MHz
1010_000
100 MHz
2
200 MHz
2
200 MHz
3/6
66/33 MHz
1010_001
100 MHz
2
200 MHz
2.5
250 MHz
3/6
66/33 MHz
1010_010
100 MHz
2
200 MHz
3
300 MHz
3/6
66/33 MHz
1010_011
100 MHz
2
200 MHz
3.5
350 MHz
3/6
66/33 MHz
1010_100
100 MHz
2
200 MHz
4
400 MHz
3/6
66/33 MHz
1011_000
100 MHz
2.5
250 MHz
2
200 MHz
4/8
62/31 MHz
1011_001
100 MHz
2.5
250 MHz
2.5
250 MHz
4/8
62/31MHz
1011_010
100 MHz
2.5
250 MHz
3
300 MHz
4/8
62/31 MHz
1011_011
100 MHz
2.5
250 MHz
3.5
350 MHz
4/8
62/31 MHz
1011_100
100 MHz
2.5
250 MHz
4
400 MHz
4/8
62/31 MHz
1
Input clock frequency is given only for the purpose of reference. User should set MODCK_H–MODCK_L so that
the resulting configuration does not exceed the frequency rating of the user’s part.
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
3
In this mode, PCI_MODCK must be “0”.
Table 17. Clock Default Configurations in PCI Agent Mode (MODCK_HI = 0000)
MODCK[1–3]1
Input Clock
Frequency
(PCI)2
CPM
Multiplication
Factor 2
CPM
Frequency
Core
Multiplication
Factor
Core
Frequency 3
Bus Division
Factor
60x Bus
Frequency4
000
66/33 MHz
2/4
133 MHz
2.5
166 MHz
2
66 MHz
001
66/33 MHz
2/4
133 MHz
3
200 MHz
2
66 MHz
010
66/33 MHz
3/6
200 MHz
3
200 MHz
3
66 MHz
011
66/33 MHz
3/6
200 MHz
4
266 MHz
3
66 MHz
Table 16. Clock Configuration Modes in PCI Host Mode (continued)
MODCK_H
MODCK[1–
3]
Input Clock
Frequency 1
(Bus)
CPM
Multiplication
Factor
CPM
Frequency
Core
Multiplication
Factor
Core
Frequency
PCI Division
Factor 2
PCI
Frequency2
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