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参数资料
型号： MPC8540VT833JB
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
封装： 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, LEAD FREE, FLIP CHIP, PLASTIC, BGA-783
文件页数： 79/104页
文件大小： 1216K
代理商： MPC8540VT833JB
MPC8540 Integrated Processor Hardware Specifications, Rev. 4.1
76
Freescale Semiconductor
Clocking
15 Clocking
This section describes the PLL configuration of the MPC8540. Note that the platform clock is identical to
the CCB clock.
15.1 Clock Ranges
Table 54 provides the clocking specifications for the processor core and Table 55 provides the clocking
specifications for the memory bus.
Table 54. Processor Core Clocking Specifications
Characteristic
Maximum Processor Core Frequency
Unit
Notes
667 MHz
833 MHz
1 GHz
MinMax
e500 core processor frequency
400
667
400
833
400
1000
MHz
1, 2, 3
Notes:
1.Caution: The CCB to SYSCLK ratio and e500 core to CCB ratio settings must be chosen such that the resulting SYSCLK
frequency, e500 (core) frequency, and CCB frequency do not exceed their respective maximum or minimum operating
frequencies. Refer to Section 15.2, “Platform/System PLL Ratio,” and Section 15.3, “e500 Core PLL Ratio,” for ratio
settings.
2.)The minimum e500 core frequency is based on the minimum platform frequency of 200 MHz.
3.)The 1.0 GHz core frequency is based on a 1.3 V VDD supply voltage.
Table 55. Memory Bus Clocking Specifications
Characteristic
Maximum Processor Core Frequency
Unit
Notes
667 MHz
833 MHz
1 GHz
Min
Max
Min
Max
Min
Max
Memory bus frequency
100
166
100
166
100
166
MHz
1, 2, 3
Notes:
1.Caution: The CCB to SYSCLK ratio and e500 core to CCB ratio settings must be chosen such that the resulting SYSCLK
frequency, e500 (core) frequency, and CCB frequency do not exceed their respective maximum or minimum operating
frequencies. Refer to Section 15.2, “Platform/System PLL Ratio,” and Section 15.3, “e500 Core PLL Ratio,” for ratio
settings.
2.The memory bus speed is half of the DDR data rate, hence, half of the platform clock frequency.
3.)The 1.0 GHz core frequency is based on a 1.3 V VDD supply voltage.
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