参数资料
型号: MPC8378ECVRAGDA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 266 MHz, MICROPROCESSOR, PBGA689
封装: 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689
文件页数: 108/125页
文件大小: 894K
代理商: MPC8378ECVRAGDA
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
83
NOTE
Figure 59 to Figure 62 below are for conceptual reference only. Due to the fact that clock
driver chip's internal structure, output impedance, and termination requirements are
different between various clock driver chip manufacturers, it is very possible that the clock
circuit reference designs provided by the clock driver chip vendor are different from what
is shown below. They might also vary from one vendor to the other. Therefore, Freescale
Semiconductor can neither provide the optimal clock driver reference circuits, nor
guarantee the correctness of the following clock driver connection reference circuits. The
system designer is recommended to contact the selected clock driver chip vendor for the
optimal reference circuits with the device SerDes reference clock receiver requirement
provided in this document.
This figure shows the SerDes reference clock connection reference circuits for HCSL type clock driver. It assumes that the DC
levels of the clock driver chip is compatible with device SerDes reference clock input’s DC requirement.
Figure 59. DC-Coupled Differential Connection with HCSL Clock Driver (Reference Only)
This figure shows the SerDes reference clock connection reference circuits for LVDS type clock driver. Since LVDS clock
driver’s common-mode voltage is higher than the device SerDes reference clock input’s allowed range (100 to 400 mV),
AC-coupled connection scheme must be used. It assumes the LVDS output driver features a 50-
termination resistor. It also
50
50
SDn_REF_CLK
Clock Driver
100
differential PWB trace
Clock driver vendor dependent
source termination resistor
SerDes Refer.
CLK Receiver
Clock Driver
CLK_Out
HCSL CLK Driver Chip
33
33
Total 50
Assume clock driver’s
output impedance is about 16
MPC8378E
CLK_Out
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