Datasheet, Volume 1 67
Electrical Specifications
7.5 Graphics Voltage Identification (GFX_VID)
A dedicated voltage regulator is required to deliver voltage to the integrated graphics
core. The integrated graphics will use seven voltage identification pins, GFX_VID[6:0],
to set the nominal operating voltage. The GFX_VID specification for the processor is
defined by the Voltage Regulator Down (VRD) 11.0 Design Guidelines. Table 7-1
specifies the voltage level corresponding to the state of the GFX_VID signals. Refer to
Table 7-7 for the DC specifications for these signals.
Individual processor GFX_VID values may be set during manufacturing so that two
devices at the same core frequency may have different default GFX_VID settings. This
is shown in the GFX_VID range values in Table 7-7.
A low-to-high or high-to-low voltage state change will result in as many GFX_VID
transitions as necessary to reach the target voltage. The voltage regulator used must
be capable of regulating its output to the value defined by the new GFX_VID values
issued. Transitions above the maximum specified VID are not permitted. One GFX_VID
transition occurs in 5 us. Minimum and maximum voltages must be maintained.
DC specifications for dynamic GFX_VID transitions are included in Table 7-7 and
Table 7-9. See the Voltage Regulator Down (VRD) 11.0 Design Guidelines for further
details.
Table 7-1. VRD 11.1/11.0 Voltage Identification Definition (Sheet 1 of 3)
VID
7
VID
6
VID
5
VID
4
VID
3
VID
2
VID
1
VID
0
V
CC_MAX
VID
7
VID
6
VID
5
VID
4
VID
3
VID
2
VID
1
VID
0
V
CC_MAX
0 0 0 0 0 0 0 0 OFF 0 1 0 1 1 0 1 1 1.04375
0 0 0 0 0 0 0 1 OFF 0 1 0 1 1 1 0 0 1.03750
0 0 0 0 0 0 1 0 1.60000 0 1 0 1 1 1 0 1 1.03125
0 0 0 0 0 0 1 1 1.59375 0 1 0 1 1 1 1 0 1.02500
0 0 0 0 0 1 0 0 1.58750 0 1 0 1 1 1 1 1 1.01875
0 0 0 0 0 1 0 1 1.58125 0 1 1 0 0 0 0 0 1.01250
0 0 0 0 0 1 1 0 1.57500 0 1 1 0 0 0 0 1 1.00625
0 0 0 0 0 1 1 1 1.56875 0 1 1 0 0 0 1 0 1.00000
0 0 0 0 1 0 0 0 1.56250 0 1 1 0 0 0 1 1 0.99375
0 0 0 0 1 0 0 1 1.55625 0 1 1 0 0 1 0 0 0.98750
0 0 0 0 1 0 1 0 1.55000 0 1 1 0 0 1 0 1 0.98125
0 0 0 0 1 0 1 1 1.54375 0 1 1 0 0 1 1 0 0.97500
0 0 0 0 1 1 0 0 1.53750 0 1 1 0 0 1 1 1 0.96875
0 0 0 0 1 1 0 1 1.53125 0 1 1 0 1 0 0 0 0.96250
0 0 0 0 1 1 1 0 1.52500 0 1 1 0 1 0 0 1 0.95626
0 0 0 0 1 1 1 1 1.51875 0 1 1 0 1 0 1 0 0.95000
0 0 0 1 0 0 0 0 1.51250 0 1 1 0 1 0 1 1 0.94375
0 0 0 1 0 0 0 1 1.50625 0 1 1 0 1 1 0 0 0.93750
0 0 0 1 0 0 1 0 1.50000 0 1 1 0 1 1 0 1 0.93125
0 0 0 1 0 0 1 1 1.49375 0 1 1 0 1 1 1 0 0.92500
0 0 0 1 0 1 0 0 1.48750 0 1 1 0 1 1 1 1 0.91875
0 0 0 1 0 1 0 1 1.48125 0 1 1 1 0 0 0 0 0.91250