參數(shù)資料
型號(hào): 24707_PUB
英文描述: Programmable Resolution 1-Wire Digital Thermometer
中文描述: 時(shí)鐘發(fā)生器規(guī)格的AMD Athlon? 64和AMD Opteron?處理器
文件頁數(shù): 40/51頁
文件大?。?/td> 1783K
代理商: 24707_PUB
Clock Generator Specification for AMD64 Processors
24707 Rev. 3.08 September 2003
Figure 7. Target Processor Internal Bias Generation
7.3.10
Differential Processor Clock for AMD64 Processors Test Load
The processor clock specification assumes the following test load:
Fifteen ohm series resistor terminations (used to match the driver impedance with the board
impedance) located close to the clk generator
Five inches of 100-ohm differential transmission line
AC coupling caps (3900 pF) and 169 ohm differential termination located <0.5” from the
processor CPUclk pins
Trace delay of 180 ps between the AC coupling caps and the processor bias generator—This is
to simulate the processor package trace propagation delay. Package trace impedance is 38
ohms single ended and 75 ohms differential.
Note
: Equivalent package trace on FR-4 PCB is 12 mil trace/30mil space/12mil trace using
stackup as shown in Figure 6 on page 35.
DC-bias generator circuit referenced to 2.5 V
Five pF load cap
Figure 8 on page 37 shows the differential processor clock test load for the AMD64 processors.
36
Electrical Specifications
Chapter 7
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