参数资料
型号: MC8641DVU1250KB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: MICROPROCESSOR, CBGA1023
封装: 33 X 33 MM, ROHS COMPLIANT, CERAMIC, BGA-1023
文件页数: 17/140页
文件大小: 1484K
代理商: MC8641DVU1250KB
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
113
Thermal
platform. See note regarding cfg_platform_freq in Section 17, “Signal Listings” since it is a reset
configuration pin that is related to platform frequency.
18.4.2
Platform to FIFO Restrictions
Please note the following FIFO maximum speed restrictions based on platform speed.
For FIFO GMII mode:
FIFO TX/RX clock frequency <= platform clock frequency / 4.2
For example, if the platform frequency is 533MHz, the FIFO TX/RX clock frequency should be no more
than 127MHz
For FIFO encoded mode:
FIFO TX/RX clock frequency <= platform clock frequency / 3.2
For example, if the platform frequency is 533MHz, the FIFO TX/RX clock frequency should be no more
than 167MHz
19 Thermal
This section describes the thermal specifications of the MPC8641.
19.1
Thermal Characteristics
Table 71 provides the package thermal characteristics for the MPC8641.
Table 70. Frequency Options of SYSCLK with Respect to Platform/MPX Clock Speed
MPX to
SYSCLK
Ratio
SYSCLK (MHz)
66
83
100
111
133
167
Platform/MPX Frequency (MHz) 1
1
SYSCLK frequency range is 66-167 MHz. Platform clock/ MPX frequency
range is 400 MHz, 500-600 MHz.
2
3
400
500
4
400
533
5
500
555
6
400
500
600
8
533
9
600
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MC8641DVU1250NB MICROPROCESSOR, CBGA1023
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