参数资料
型号: MPC8544DVTANG
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA783
封装: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件页数: 104/128页
文件大小: 1411K
代理商: MPC8544DVTANG
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1
Freescale Semiconductor
77
High-Speed Serial Interfaces (HSSI)
Figure 53. Differential Measurement Points for Rise and Fall Time
Figure 54. Single-Ended Measurement Points for Rise and Fall Time Matching
The other detailed AC requirements of the SerDes Reference Clocks is defined by each interface protocol
based on application usage. Refer to the following sections for detailed information:
Rising edge rate (SDn_REF_CLK) to falling edge rate
(SDn_REF_CLK) matching
Rise-Fall
Matching
20
%
1, 4
Notes:
1. Measurment taken from single ended waveform.
2. Measurment taken from differential waveform.
3. Measured from -200 mV to +200 mV on the differential waveform (derived from SDn_REF_CLK minus
SDn_REF_CLK). The signal must be monotonic through the measurement region for rise and fall time. The 400 mV
measurement window is centered on the differential zero crossing. See Figure 53.
4. Matching applies to rising edge rate for SDn_REF_CLK and falling edge rate for SDn_REF_CLK. It is measured
using a 200 mV window centered on the median cross point where SDn_REF_CLK rising meets SDn_REF_CLK
falling. The median cross point is used to calculate the voltage thresholds the oscilloscope is to use for the edge
rate calculations. The Rise Edge Rate of SDn_REF_CLK should be compared to the Fall Edge Rate of
SDn_REF_CLK, the maximum allowed difference should not exceed 20% of the slowest edge rate. See Figure 54.
Table 58. SerDes Reference Clock Common AC Parameters (continued)
At recommended operating conditions with XVDD_SRDS1 or XVDD_SRDS2 = 1.1V ± 5%.
Parameter
Symbol
Min
Max
Unit
Notes
VIH = +200
VIL = -200 mV
0.0 V
SDn_REF_CL
K
minus
SDn_REF_CLK
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