參數(shù)資料
型號: MPC8272CVRI
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, EPROM, 200 MHz, RISC MICROCONTROLLER, PBGA516
封裝: 27 X 27 MM, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-516
文件頁數(shù): 30/61頁
文件大?。?/td> 394K
代理商: MPC8272CVRI
MPC8272 PowerQUICC II Family Hardware Specifications, Rev. 3
36
Freescale Semiconductor
Clock Configuration Modes
7.2
PCI Agent Mode
These tables show configurations for PCI agent mode. The frequency values listed 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. Note that in PCI agent mode the input clock is PCI
clock.
6 CPM_CLK/PCI_CLK ratio. When PCI_MODCK = 1, the ratio of CPM_CLK/PCI_CLK should be calculated from
PCIDF as follows:
PCIDF = 3 > CPM_CLK/PCI_CLK = 4
PCIDF = 5 > CPM_CLK/PCI_CLK = 6
PCIDF = 7 > CPM_CLK/PCI_CLK = 8
PCIDF = 9 > CPM_CLK/PCI_CLK = 5
PCIDF = B > CPM_CLK/PCI_CLK = 6
Table 19. Clock Configurations for PCI Agent Mode (PCI_MODCK=0)1,2
Mode3
PCI Clock
(MHz)
CPM
Multiplication
Factor4
CPM Clock
(MHz)
CPU
Multiplication
Factor5
CPU Clock
(MHz)
Bus
Division
Factor
Bus Clock
(MHz)
MODCK_H-
MODCK[1-3]
Low
High
Low
High
Low
High
Low
High
Default Modes (MODCK_H=0000)
0000_000
60.0
66.7
2
120.0 133.3
2.5
150.0 166.7
2
60.0
66.7
0000_001
50.0
66.7
2
100.0 133.3
3
150.0 200.0
2
50.0
66.7
0000_010
50.0
66.7
3
150.0 200.0
3
150.0 200.0
3
50.0
66.7
0000_011
50.0
66.7
3
150.0 200.0
4
200.0 266.6
3
50.0
66.7
0000_100
50.0
66.7
3
150.0 200.0
3
180.0 240.0
2.5
60.0
80.0
0000_101
50.0
66.7
3
150.0 200.0
3.5
210.0 280.0
2.5
60.0
80.0
0000_110
50.0
66.7
4
200.0 266.6
3.5
233.3 311.1
3
66.7
88.9
0000_111
50.0
66.7
4
200.0 266.6
3
240.0 320.0
2.5
80.0
106.7
Full Configuration Modes
0001_001
60.0
66.7
2
120.0 133.3
5
150.0 166.7
4
30.0
33.3
0001_010
50.0
66.7
2
100.0 133.3
6
150.0 200.0
4
25.0
33.3
0001_011
50.0
66.7
2
100.0 133.3
7
175.0 233.3
4
25.0
33.3
0001_100
50.0
66.7
2
100.0 133.3
8
200.0 266.6
4
25.0
33.3
0010_001
50.0
66.7
3
150.0 200.0
3
180.0 240.0
2.5
60.0
80.0
0010_010
50.0
66.7
3
150.0 200.0
3.5
210.0 280.0
2.5
60.0
80.0
0010_011
50.0
66.7
3
150.0 200.0
4
240.0 320.0
2.5
60.0
80.0
0010_100
50.0
66.7
3
150.0 200.0
4.5
270.0 360.0
2.5
60.0
80.0
相關PDF資料
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