参数资料
型号: MPC8572CPXAUNB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1333 MHz, MICROPROCESSOR, PBGA1023
封装: 33 X 33 MM, PLASTIC, FCBGA-1023
文件页数: 113/138页
文件大小: 1502K
代理商: MPC8572CPXAUNB
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
76
Freescale Semiconductor
High-Speed Serial Interfaces (HSSI)
Figure 46. Differential Reference Clock Input DC Requirements (External AC-Coupled)
Figure 47. Single-Ended Reference Clock Input DC Requirements
15.2.3
Interfacing With Other Differential Signaling Levels
With on-chip termination to SGND_SRDSn (xcorevss), the differential reference clocks inputs are
HCSL (High-Speed Current Steering Logic) compatible DC-coupled.
Many other low voltage differential type outputs like LVDS (Low Voltage Differential Signaling)
can be used but may need to be AC-coupled due to the limited common mode input range allowed
(100 to 400 mV) for DC-coupled connection.
LVPECL outputs can produce signal with too large amplitude and may need to be DC-biased at
clock driver output first, then followed with series attenuation resistor to reduce the amplitude, in
addition to AC-coupling.
SD
n_REF_CLK
SD
n_REF_CLK
Vcm
200 mV < Input Amplitude or Differential Peak < 800 mV
Vmax
< Vcm + 400 mV
Vmin
> Vcm – 400 mV
SD
n_REF_CLK
SD
n_REF_CLK
400 mV
< SDn_REF_CLK Input Amplitude < 800 mV
0V
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