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550 参数 Datasheet PDF下载

550图片预览
型号: 550
PDF下载: 下载PDF文件 查看货源
内容描述: 奔腾4处理器,支持超线程技术 [Pentium 4 Processors Supporting Hyper-Threading Technology]
分类和应用:
文件页数/大小: 96 页 / 1585 K
品牌: INTEL [ INTEL ]
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Land Listing and Signal Descriptions  
Table 4-3. Signal Description (Sheet 8 of 8)  
Name  
Type  
Description  
VID[5:0] (Voltage ID) signals are used to support automatic selection of power  
supply voltages (VCC). These are open drain signals that are driven by the  
processor and must be pulled up on the motherboard. Refer to the Voltage  
Regulator-Down (VRD) 10.1 Design Guide for Desktop Socket 775 for more  
information. The voltage supply for these signals must be valid before the VR  
can supply VCC to the processor. Conversely, the VR output must be disabled  
until the voltage supply for the VID signals becomes valid. The VID signals are  
needed to support the processor voltage specification variations. See Table 2-2  
for definitions of these signals. The VR must supply the voltage that is  
requested by the signals, or disable itself.  
VID[5:0]  
Output  
VSS are the ground pins for the processor and should be connected to the  
system ground plane.  
VSS  
Input  
Input  
VSSA  
VSSA is the isolated ground for internal PLLs.  
VSS_SENSE is an isolated low impedance connection to processor core VSS. It  
can be used to sense or measure ground near the silicon with little noise.  
VSS_SENSE  
Output  
This land is provided as a voltage regulator feedback sense point for VSS. It is  
connected internally in the processor package to the sense point land V27 as  
described in the Voltage Regulator-Down (VRD) 10.1 Design Guide for Desktop  
Socket 775.  
VSS_MB_  
REGULATION  
Output  
VTT  
Miscellaneous voltage supply.  
The VTT_OUT_LEFT and VTT_OUT_RIGHT signals are included to provide a  
voltage supply for some signals that require termination to VTT on the  
motherboard.  
For future processor compatibility some signals are required to be pulled up to  
VTT_OUT_LEFT or VTT_OUT_RIGHT. Refer to the following table for the  
signals that should be pulled up to VTT_OUT_LEFT and VTT_OUT_RIGHT.  
VTT_OUT_LEFT  
VTT_OUT_RIGHT  
Output  
Pull-up Signal  
Signals to be Pulled Up  
VTT_PWRGOOD, VID[5:0], GTLREF, TMS, TDI,  
TDO, BPM[5:0], other VRD components  
VTT_OUT_RIGHT  
RESET#, BR0#, PWRGOOD, TESTHI1, TESTHI8,  
TESTHI9, TESTHI10, TESTHI11, TESTHI12  
VTT_OUT_LEFT  
The VTT_SEL signal is used to select the correct VTT voltage level for the  
processor.  
VTT_SEL  
Output  
Input  
The processor requires this input to determine that the VTT voltages are stable  
and within specification.  
VTTPWRGD  
§
Datasheet  
73  
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