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| 型号： | MC8610TPX1066JZ |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MICROPROCESSOR, PBGA783 |
| 封装： | 29 X 29 MM, PLASTIC, FCBGA-783 |
| 文件页数： | 57/96页 |
| 文件大小： | 1237K |
| 代理商： | MC8610TPX1066JZ |
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MPC8610 Integrated Host Processor Hardware Specifications, Rev. 2
Electrical Characteristics
Freescale Semiconductor
60
Figure 37 shows the SerDes reference clock connection reference circuits for a single-ended clock driver. It assumes the DC
levels of the clock driver are compatible with MPC8610 SerDes reference clock input’s DC requirement.
Figure 37. Single-Ended Connection (Reference Only)
2.17.2.4
AC Requirements for SerDes Reference Clocks
The clock driver selected should provide a high quality reference clock with low phase noise and cycle-to-cycle jitter. Phase
noise less than 100 kHz can be tracked by the PLL and data recovery loops and is less of a problem. Phase noise above 15 MHz
is filtered by the PLL. The most problematic phase noise occurs in the 1–15 MHz range. The source impedance of the clock
driver should be 50
Ω to match the transmission line and reduce reflections which are a source of noise to the system.
Table 47 describes some AC parameters common to PCI Express protocols.
Table 47. SerDes Reference Clock Common AC Parameters
At recommended operating conditions with X1VDD or X2VDD = 1.0 V ± 5% and 1.025 V ± 5%.
Parameter
Symbol
Min
Max
Unit
Notes
Rising Edge Rate
Rise Edge Rate
1.0
4.0
V/ns
2, 3
Falling Edge Rate
Fall Edge Rate
1.0
4.0
V/ns
2, 3
Differential Input High Voltage
VIH
+200
mV
2
Differential Input Low Voltage
VIL
—
–200
mV
2
SD
n_REF_CLK
SD
n_REF_CLK
100
Ω Differential PWB Trace
Clock Driver
CLK_Out
Single-Ended CLK
Driver Chip
MPC8610
33
Ω
Total 50
Ω. Assume clock driver’s
output impedance is about 16
Ω.
50
Ω
SerDes Refer.
CLK Receiver
50
Ω
50
Ω
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