參數(shù)資料
型號(hào): MCF5473
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: MCF547x Integrated Microprocessor Electrical Characteristics
中文描述: MCF547x集成的微處理器,電氣特性
文件頁數(shù): 7/28頁
文件大?。?/td> 706K
代理商: MCF5473
PLL Timing Specifications
MCF547x Integrated Microprocessor Electrical Characteristics, Rev. 2
Freescale Semiconductor
7
6
PLL Timing Specifications
The specifications in
Table 7
are for the CLKIN pin.
Input Clock Timing Diagram
Table 8
shows the supported PLL encodings.
Figure 4
correlates CLKIN, internal bus, and core clock frequencies for the 1x–4x multipliers.
Figure 4. CLKIN, Internal Bus, and Core Clock Ratios
Table 7. Clock Timing Specification
Num Characteristic
Min
Max
Units
C1
Cycle time
15.15
33.3
ns
C2
Rise time (20% of Vdd to 80% of vdd)
2
ns
C3
Fall time (80% of Vdd to 20% of Vdd)
2
ns
C4
Duty cycle (at 50% of Vdd)
40
60
%
Table 8. MCF547X Divide Ratio Encodings
AD[12:8]
1
NOTES:
1
All other values of AD[12:8] are reserved.
Clock Ratio
CLKIN—PCI and FlexBus
Frequency Range
(MHz)
Internal XLB, SDRAM
Bus, and PSTCLK
Frequency Range
(MHz)
Core Frequency Range
(MHz)
00011
1:2
41.6–66.66
83.33–133.33
166.66–266.66
00101
1:2
25.0–44.4
50.0–88.8
100.0–177.66
01111
1:4
25.0–33.3
100–133.33
200–266.66
CLKIN
C4
C1
C4
C2
C3
25
50
70
80
100
120
140
160
240
260
60
25.0
CLKIN (MHz)
Core Clock (MHz)
66.66
200.0
50
70
90
110
30
Internal Clock (MHz)
2x
2x
4x
2x
Core Clock
CLKIN
Internal Clock
25.0
33.33
130
180
200
220
50.0
133.33
100.0
133.33
266.66
266.66
100.0
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