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Table 5-1.
Signal Definitions (Sheet 4 of 4)
Name
VTT_VID[4:2]
VTT_SENSE
VSS_SENSE_VTT
VTTPWRGOOD
Notes:
1.
DDR{0/1/2} refers to DDR3 Channel 0, DDR3 Channel 1, and DDR3 Channel 2.
70
Type
VTT_VID[2:4] (VTTVoltage ID) are used to support automatic selection of power
O
supply voltages (V
).
TT
VTT_SENSE and VSS_SENSE_VTT provide an isolated, low impedance
O
connection to the processor V
O
or measure voltage near the silicon.
The processor requires this input signal to be a clean indication that the V
power supply is stable and within specifications. 'Clean' implies that the signal
will remain low (capable of sinking leakage current), without glitches, from the
I
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.
Description
voltage and ground. They can be used to sense
TT
§
Signal Descriptions
Notes
TT
Datasheet
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