Intel BX80601920 Data Sheet - Page 70
Table 5-1., Signal Definitions Sheet 4 of 4
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Signal Descriptions Table 5-1. Signal Definitions (Sheet 4 of 4) Name Type Description VTT_VID[4:2] VTT_SENSE VSS_SENSE_VTT O VTT_VID[2:4] (VTTVoltage ID) are used to support automatic selection of power supply voltages (VTT). O O VTT_SENSE and VSS_SENSE_VTT provide an isolated, low impedance connection to the processor VTT voltage and ground. They can be used to sense or measure voltage near the silicon. VTTPWRGOOD The processor requires this input signal to be a clean indication that the VTT power supply is stable and within specifications. 'Clean' implies that the signal I will remain low (capable of sinking leakage current), without glitches, from the time that the power supplies are turned on until they come within specification. The signal must then transition monotonically to a high state. Note that it is not valid for VTTPWRGOOD to be de-asserted while VCCPWRGOOD is asserted. Notes: 1. DDR{0/1/2} refers to DDR3 Channel 0, DDR3 Channel 1, and DDR3 Channel 2. Notes § 70 Datasheet