Geode GXLV Processor Series Low Power Integrated x86 Solutions

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Geode GXLV Processor SeriesElectrical Specifications (Continued)6.7 AC CHARACTERISTICSThe following tables list the AC characteristics includingoutput delays, input setup requirements, input holdrequirements, and output float delays. The rising-clockedgereference level V REF , and other reference levels areshown in Table 6-13. Input or output signals must crossthese levels during testing.Input setup and hold times are specified minimums thatdefine the smallest acceptable sampling window for whicha synchronous input signal must be stable for correct operation.All AC tests are performed at V CC2 = 2.1V to 2.31V (2.2VNominal), V CC2 = 2.37V to 2.63V (2.5V Nominal), V CC2 =2.76V to 3.05V (2.9V Nominal), V CC3 = 3.0V to 3.6V (3.3VNominal), T C =0 o Cto85 o C, R L = 50 ohms, and C L =50pF unless otherwise specifiedWhile most minimum, maximum, and typical AC characteristicsare only shown as a single value, they are testedand guaranteed across the entire processor core voltagerange of 2.2V to 2.9V (nominal). AC characteristics thatare affected significantly by the core voltage or speedgrade are documented accordingly.Table 6-13. Drive Level and MeasurementPoints for Switching CharacteristicsSymbolVoltage (V)V REF 1.5V IHD 2.4V ILD 0.4T XCLKV IHDV ILDV REFBAMinMaxOUTPUTSValid Output nValid Output n+1V REFCDINPUTSV IHDV ILDValid InputV REFLegend: A = Maximum Output Delay SpecificationB = Minimum Output Delay SpecificationC = Minimum Input Setup SpecificationD = Minimum Input Hold SpecificationFigure 6-4. Drive Level and Measurement Points for Switching Characteristicswww.national.com 196 Revision 1.3
Electrical Specifications (Continued)Table 6-14. Clock Signals (Refer to Figures 6-5 and 6-6)SYSCLK = 33 MHz SYSCLK = 30 MHzSymbol ParameterMin Typ Max Min Typ Max Units Commentst1 SYSCLK Period 29.75 30.0 30.25 33.05 33.3 33.55 ns Note 1t2 SYSCLK Period Stability ±250 ±250 pst3 SYSCLK High Time 10.5 11.66 nst4 SYSCLK Low Time 10.5 11.66 nst5 SYSCLK Fall Time 0.5 1.5 0.5 1.5 ns Note 3t6 SYSCLK Rise Time 0.5 1.5 0.5 1.5 ns Note 3t9 SDCLK_OUT, SDCLK[3:0] Period166 MHz / 2.5 13 15.0 17 ns Note 2180 MHz / 2.5 11.9 13.9 16.9180 MHz / 3 14.7 16.7 18.7200 MHz / 3 13 15.0 17233 MHz / 3 10.9 12.9 15.9233 MHz / 3.5 13 15.0 17266 MHz / 3.5 11.1 13.1 16.1266 MHz / 4 13 15.0 17t10 SDCLK_OUT, SDCLK[3:0] High Time166 MHz / 2.5 6.5 ns Note 2180 MHz / 2.5 5.95180 MHz / 3 7.35200 MHz / 3 6.5233 MHz / 3 5.45233 MHz / 3.5 6.5266 MHz / 3.5 5.55266 MHz / 4 6.5t11 SDCLK_OUT, SDCLK[3:0] Low Time166 MHz / 2.5 6.5 ns Note 2180 MHz / 2.5 5.95180 MHz / 3 7.35200 MHz / 3 6.5233 MHz / 3 5.45233 MHz / 3.5 6.5266 MHz / 3.5 5.55266 MHz / 4 6.5Geode GXLV Processor SeriesRevision 1.3 197 www.national.com
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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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