Geode GXLV Processor Series Low Power Integrated x86 Solutions

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Geode GXLV Processor SeriesElectrical Specifications (Continued)A3.3V Plane(V CC3 )1 372.2V, 2.5V, or 2.9V Plane(V CC2 )A3.3V Plane(V CC3 )Geode GXLVProcessor320 SPGA - Top View3.3V Plane(V CC3 )2.2V, 2.5V, or 2.9V Plane(V CC2 )ANAN1 To 2.9V373.3V PlaneRegulator(V CC3 )Legend= High frequency capacitor= 220 µF, low ESR capacitor= 3.3V connection= 2.2V, 2.5V, or 2.9V connectionNote: Where signals cross plane splits, it is recommended to include ACdecoupling between planes with 47 pF capacitors.Figure 6-2. SPGA Recommended Split Power Plane and Decouplingwww.national.com 186 Revision 1.3
Electrical Specifications (Continued)6.2.2 NC-Designated PinsPins designated NC (No Connection) should be left disconnected.Connecting an NC pin to a pull-up/-downresistor, or an active signal could cause unexpectedresults and possible circuit malfunctions.6.2.3 Pull-Up and Pull-Down ResistorsTable 6-2 lists the input pins that are internally connectedto a weak (>20-kohm) pull-up/-down resistor. Whenunused, these inputs do not require connection to anexternal pull-up/-down resistor.6.2.4 Unused Input PinsAll inputs not used by the system designer and not listedin Table 6-2 should be kept at either ground or V CC3 .Toprevent possible spurious operation, connect active-highinputs to ground through a 20-kohm (±10%) pull-downresistor and active-low inputs to V CC3 through a 20-kohm(±10%) pull-up resistor.Table6-2. Pinswith>20-kohm Internal ResistorSignal Name BGA Ball No. PU/PDSUSP# H2 Pull-upFRAME# A8 Pull-upIRDY# C9 Pull-upTRDY# B9 Pull-upSTOP# C11 Pull-upLOCK# B11 Pull-upDEVSEL# A9 Pull-upPERR# A11 Pull-upSERR# C12 Pull-upREQ[2:0]# D3, H3, E3 Pull-upTCLK J2 Pull-upTMS H1 Pull-upTDI D2 Pull-upTEST F3 Pull-downGeode GXLV Processor SeriesRevision 1.3 187 www.national.com
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Geode GXLV Processor SeriesArchitec
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Architecture Overview (Continued)Ge
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2.0 Signal DefinitionsThis section
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Signal Definitions (Continued)PinNo
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Signal Definitions (Continued)Table
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Signal Definitions (Continued)PinNo
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Signal Definitions (Continued)2.2.2
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Integrated Functions (Continued)4.1
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Geode GXLV Processor Series Low Pow
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Geode GXLV Processor Series Low Power Integrated x86 Solutions

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