参数资料
型号: MPC8270CZUUPEA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 100 MHz, RISC PROCESSOR, PBGA480
封装: 37 X 37 MM, 1.27 MM PITCH, FTBGA-480
文件页数: 77/156页
文件大小: 1680K
代理商: MPC8270CZUUPEA
MOTOROLA
MPC8280 PowerQUICC II Family Hardware Specications
27
Clock Conguration Modes
NOTE: PCI_MODCK
In PCI mode only, PCI_MODCK comes from the LGPL5 pin and
MODCK_H[0–3] comes from {LGPL0, LGPL1, LGPL2, LGPL3}.
NOTE: Tval (Output Hold)
The minimum Tval = 2 when PCI_MODCK = 1, and the minimum
Tval = 1 when PCI_MODCK = 0. Therefore, designers should use clock
congurations that t this condition to achieve PCI-compliant AC timing.
Table 16. Clock Congurations for PCI Host Mode (PCI_MODCK=0)1,2
Mode3
Bus Clock4
(MHz)
CPM
Multiplication
Factor5
CPM Clock
(MHz)
CPU
Multiplication
Factor6
CPU Clock
(MHz)
PCI
Division
Factor
PCI Clock
(MHz)
MODCK_H-
MODCK[1-3]
low
high
low
high
low
high
low high
Default Modes (MODCK_H=0000)
0000_000
66.7
2
133.3 133.3
2.5
166.7 166.7
2
66.7 66.7
0000_001
66.7
2
133.3 133.3
3
200.0 200.0
2
66.7 66.7
0000_010
55.5
80.0
2.5
150.0 200.0
3
166.7 240.0
3
50.0 66.7
0000_011
71.4
80.0
2.5
178.6 200.0
3.5
250.0 280.0
3
59.5 66.7
0000_100
62.5
80.0
2.5
156.3 200.0
4
250.0 320.0
3
52.1 66.7
0000_101
55.5
66.7
3
166.7 200.0
3
166.7 200.0
3
55.5 66.7
0000_110
PCI host mode (PCI_MODCK=1) only (refer to Table 17)
0000_111
62.5
66.7
3
187.5 200.0
4
250.0 266.6
3
62.5 66.7
Full Conguration Modes
0001_000
50.0
66.7
3
150.0 200.0
5
250.0 333.3
3
50.0 66.7
0001_001
50.0
66.7
3
150.0 200.0
6
300.0 400.0
3
50.0 66.7
0001_010
50.0
66.7
3
150.0 200.0
7
350.0 466.6
3
50.0 66.7
0001_011
50.0
66.7
3
150.0 200.0
8
400.0 533.3
3
50.0 66.7
0010_000
50.0
66.7
4
200.0 266.6
5
250.0 333.3
4
50.0 66.7
0010_001
50.0
66.7
4
200.0 266.6
6
300.0 400.0
4
50.0 66.7
0010_010
50.0
66.7
4
200.0 266.6
7
350.0 466.6
4
50.0 66.7
0010_011
50.0
66.7
4
200.0 266.6
8
400.0 533.3
4
50.0 66.7
0010_100
75.0
100.0
4
300.0 400.0
5
375.0 500.0
6
50.0 66.7
0010_101
75.0
100.0
4
300.0 400.0
5.5
412.5 549.9
6
50.0 66.7
0010_110
75.0
100.0
4
300.0 400.0
6
450.0 599.9
6
50.0 66.7
0011_000
50.0
66.7
5
250.0 333.3
5
250.0 333.3
5
50.0 66.7
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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