参数资料
型号: MPC8378CVRALDA
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: 111/125页
文件大小: 894K
代理商: MPC8378CVRALDA
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
86
Figure 63. Differential Measurement Points for Rise and Fall Time
Figure 64. Single-Ended Measurement Points for Rise and Fall Time Matching
Differential Input High Voltage
VIH
200
mV
Differential Input Low Voltage
VIL
–200
mV
Rising edge rate (SDn_REF_CLK) to falling edge rate
(SDn_REF_CLK) matching
Rise-Fall Matching
20
%
Notes:
1. Measurement taken from single ended waveform.
2. Measurement 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 63.
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 64.
Table 67. SerDes Reference Clock Common AC Parameters (continued)
At recommended operating conditions with XVDD_SRDS or XVDD_SRDS = 1.0 V ± 5%.
Parameter
Symbol
Min
Max
Unit
Note
VIH = +200 mV
0.0 V
VIL = –200 mV
SDn_REF_CLK
Minus
SDn_REF_CLK
Rise Edge Rate
Fall Edge Rate
TFALL TRISE
SDn_REF_CLK
VCROSS MEDIAN
SDn_REF_CLK
VCROSS MEDIAN
SDn_REF_CLK
VCROSS MEDIAN –100 mV
VCROSS MEDIAN +100 mV
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