Voltage Identification Definition - Intel Core i7 Extreme Edition Datasheet

Electrical Specifications
The processor uses eight voltage identification signals, VID[7:0], to support automatic
selection of voltages.
VID[7:0]. A '1' in this table refers to a high voltage level and a '0' refers to a low
voltage level. If the processor socket is empty (VID[7:0] = 11111111), or the voltage
regulation circuit cannot supply the voltage that is requested, the voltage regulator
must disable itself.
The processor provides the ability to operate while transitioning to an adjacent VID and
its associated processor core voltage (V
loadline. It should be noted that a low-to-high or high-to-low voltage state change will
result in as many VID transitions as necessary to reach the target core voltage.
Transitions above the maximum specified VID are not permitted.
step sizes and DC shift ranges. Minimum and maximum voltages must be maintained
as shown in
The VR used must be capable of regulating its output to the value defined by the new
VID. DC specifications for dynamic VID transitions are included in
Table 2-8.
Table 2-1. Voltage Identification Definition (Sheet 1 of 3)
VID VID VID VID VID
7 6 5 4 3
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 1
0 0 0 0 1
0 0 0 0 1
0 0 0 0 1
0 0 0 0 1
0 0 0 0 1
0 0 0 0 1
0 0 0 0 1
0 0 0 1 0
0 0 0 1 0
0 0 0 1 0
0 0 0 1 0
0 0 0 1 0
0 0 0 1 0
0 0 0 1 0
0 0 0 1 0
0 0 0 1 1
0 0 0 1 1
0 0 0 1 1
0 0 0 1 1
0 0 0 1 1
0 0 0 1 1
0 0 0 1 1
Datasheet
Table 2-1 specifies the voltage level corresponding to the state of
Table 2-8.
VID VID VID
V
CC_MAX
2 1 0
0 0 0 OFF
0 0 1 OFF
0 1 0 1.60000
0 1 1 1.59375
1 0 0 1.58750
1 0 1 1.58125
1 1 0 1.57500
1 1 1 1.56875
0 0 0 1.56250
0 0 1 1.55625
0 1 0 1.55000
0 1 1 1.54375
1 0 0 1.53750
1 0 1 1.53125
1 1 0 1.52500
1 1 1 1.51875
0 0 0 1.51250
0 0 1 1.50625
0 1 0 1.50000
0 1 1 1.49375
1 0 0 1.48750
1 0 1 1.48125
1 1 0 1.47500
1 1 1 1.46875
0 0 0 1.46250
0 0 1 1.45625
0 1 0 1.45000
0 1 1 1.44375
1 0 0 1.43750
1 0 1 1.43125
1 1 0 1.42500
). This will represent a DC shift in the
CC
VID VID VID VID VID
7 6 5 4 3
0 1 0 1 1
0 1 0 1 1
0 1 0 1 1
0 1 0 1 1
0 1 0 1 1
0 1 1 0 0
0 1 1 0 0
0 1 1 0 0
0 1 1 0 0
0 1 1 0 0
0 1 1 0 0
0 1 1 0 0
0 1 1 0 0
0 1 1 0 1
0 1 1 0 1
0 1 1 0 1
0 1 1 0 1
0 1 1 0 1
0 1 1 0 1
0 1 1 0 1
0 1 1 0 1
0 1 1 1 0
0 1 1 1 0
0 1 1 1 0
0 1 1 1 0
0 1 1 1 0
0 1 1 1 0
0 1 1 1 0
0 1 1 1 0
0 1 1 1 1
0 1 1 1 1
Table 2-8 includes VID
Table 2-7 and
VID VID VID
V
CC_MAX
2 1 0
0 1 1 1.04375
1 0 0 1.03750
1 0 1 1.03125
1 1 0 1.02500
1 1 1 1.01875
0 0 0 1.01250
0 0 1 1.00625
0 1 0 1.00000
0 1 1 0.99375
1 0 0 0.98750
1 0 1 0.98125
1 1 0 0.97500
1 1 1 0.96875
0 0 0 0.96250
0 0 1 0.95626
0 1 0 0.95000
0 1 1 0.94375
1 0 0 0.93750
1 0 1 0.93125
1 1 0 0.92500
1 1 1 0.91875
0 0 0 0.91250
0 0 1 0.90625
0 1 0 0.90000
0 1 1 0.89375
1 0 0 0.88750
1 0 1 0.88125
1 1 0 0.87500
1 1 1 0.86875
0 0 0 0.86250
0 0 1 0.85625
15