Intel® 865G/865GV Chipset Datasheet - download.intel.nl - Intel

Electrical CharacteristicsTable 37. DC Operating Characteristics (Sheet 2 of 2)Signal Name Parameter Min Nom Max UnitHDVREF 2 Host Reference Voltage 0.63 x Vsh_min – 2% 0.63 x Vsh0.63 x Vsh_max+ 2%VHDSWING/HASWINGHost CompensationReference Voltage1/4 x VTT_min – 2% 1/4 x VTT1/4 x VTT_max+ 2%VSMXRCOMPVOL 3 /SMYRCOMPVOLSMXRCOMPVOH 3 /SMYRCOMPVOHDDR RCOMP VOLVCC_DDR_min *(1/4.112) – 2%VCC_DDR *(1/4.112)VCC_DDR_max *(1/4.112) + 2%VDDR RCOMP VOHVCC_DDR_min *(3.112/4.112) - 2%VCC_DDR *(3.112/4.112)VCC_DDR_max *(3.112/4.112) + 2%VSMVREFDDR Reference Voltage0.49 xVCC_DDR_min0.5 x VCC_DDR0.51 xVCC_DDR_maxVNOTES:1. Refer to the Intel ® Pentium ® 4 Processor with 512-KB L2 Cache on 0.13 Micron Process Datasheet VCCvalues used to calculate Vsh. For values pertaining to the Pentium 4 processor on 90 nm process, contactyour Intel field representative.2. HDVREF is generically referred to as GTLREF throughout the rest of this chapter.3. SMXRCOMPVOL/SMYRCOMPVOL and SMXRCOMPVOH/SMYRCOMPVOH have maximum input leakagecurrent of 1 mA.4. Measured at receiver pad.5. Standard 50 Ω load to ground.6. HI_REF and HI_SWING are derived from VCC (nominal VCC = 1.5 V) that is the nominal core voltage for theGMCH. Voltage supply tolerance for a particular interface driver voltage must be within a 5% range ofnominal.7. Nominal value of HI_REF is 0.350 V. The specification is at nominal VCC. Note that HI_REF varies linearlywith VCC; thus, VCC variation (± 5%) must be accounted for in the HI_REF specification in addition to the 2%variation of HI_REF in the table.8. Nominal value of HI_SWING is 0.800 V. The specification is at nominal VCC. Note that HI_SWING varieslinearly with VCC; thus, VCC variation (± 5%) must be accounted for in the HI_SWING specification inaddition to the 2% variation of HI_SWING in the table.9. CI_REF and CI_SWING are derived from VCC (nominal VCC = 1.5 V) that is the nominal core voltage for theGMCH. Voltage supply tolerance for a particular interface driver voltage must be within a 5% range ofnominal.10.Nominal value of CI_VREF is 0.350 V. The specification is at nominal VCC. Note that CI_VREF varieslinearly with VCC; thus, VCC variation (± 5%) must be accounted for in the CI_VREF specification in additionto the 2% variation of CI_REF in the table.11.Nominal value of CI_SWING is 0.800 V. The specification is at nominal VCC. Note that CI_SWING varieslinearly with VCC; thus, VCC variation (± 5%) must be accounted for in the CI_SWING specification inaddition to the 2% variation of CI_SWING in the table.12.For AC noise components >20 MHz, the maximum allowable noise component at the GMCH is ±180 mV atVCC_nom, +180/-105 mV at VCC_min, and +105/-180 mV at VCC_max. For AC noise components