參數(shù)資料
型號: MC8640TVU1250HC
廠商: Freescale Semiconductor
文件頁數(shù): 8/130頁
文件大?。?/td> 0K
描述: MPU DUAL E600 994-FCCBGA
標準包裝: 1
系列: MPC86xx
處理器類型: 32-位 MPC86xx PowerPC
速度: 1.25GHz
電壓: 1.05V
安裝類型: 表面貼裝
封裝/外殼: 994-BCBGA,F(xiàn)CCBGA
供應商設備封裝: 994-FCCBGA(33x33)
包裝: 托盤
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
Freescale Semiconductor
105
Clocking
18.2
MPX to SYSCLK PLL Ratio
The MPX clock is the clock that drives the MPX bus, and is also called the platform clock. The frequency
of the MPX is set using the following reset signals, as shown in Table 68:
SYSCLK input signal
Table 65. Memory Bus Clocking Specifications
Parameter
Maximum Processor Core
Frequency
Unit
Notes
1000, 1067, 1250 MHz
Min
Max
Memory bus clock frequency
200
266
MHz
1, 2
Notes:
1. Caution: The MPX clock to SYSCLK ratio and e600 core to MPX clock ratio settings must be chosen such that the resulting
SYSCLK frequency, e600 (core) frequency, and MPX clock frequency do not exceed their respective maximum or minimum
for ratio settings.
2. The memory bus clock speed is half the DDR/DDR2 data rate, hence, half the MPX clock frequency.
Table 66. Platform/MPX bus Clocking Specifications
Parameter
Maximum Processor Core
Frequency
Unit
Notes
1000, 1067, 1250 MHz
Min
Max
Platform/MPX bus clock frequency
400
533
MHz
1, 2
Notes:
1. Caution: The MPX clock to SYSCLK ratio and e600 core to MPX clock ratio settings must be chosen such that the resulting
SYSCLK frequency, e600 (core) frequency, and MPX clock frequency do not exceed their respective maximum or minimum
for ratio settings.
2. Platform/MPX frequencies between 400 and 500 MHz are not supported.
Table 67. Local Bus Clocking Specifications
Parameter
Maximum Processor Core
Frequency
Unit
Notes
1000, 1067, 1250 MHz
Min
Max
Local bus clock speed (for Local Bus Controller)
25
133
MHz
1
Notes:
1. The Local bus clock speed on LCLK[0:2] is determined by MPX clock divided by the Local Bus PLL ratio programmed in
LCRR[CLKDIV]. See the reference manual for the MPC8641D for more information on this.
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