Intel Z670 AY80609007293AA Data Sheet
Product codes
AY80609007293AA
Electrical Specifications
Datasheet
23
4.4
Voltage Identification (VID)
The V
CC
and V
NN
voltage inputs use two encoding pins (VIDEN[1:0]) to enable the VID
pin inputs and seven voltage identification pins (VID[6:0]) to select the power supply
voltage. The VID/VIDEN pins for the processor are CMOS outputs driven by the
processor VID circuitry.
state of VID[6:0]. A “1” in this refers to a high-voltage level and a “0” refers to a
low-voltage level. For more details about PMIC design to support the processor power
supply requirements, refer to the vendor’s specification.
4.4.1
VID Enable
Both V
CC
and V
NN
are variable in Intel® Atom™ Processor Z670. Processor implements
a new VID mechanism that minimizes the number of required pins. The VID for V
NN
and V
CC
are multiplexed on to the same set of pins and a separate 2-bit enable/ID is
defined to specify what the driven VID corresponds to. One of the combinations is
used to notify that the VID is invalid. This is used when the processor is in C6/Standby
to tri-state the VID pins to save power.
Table 4-1. VIDEN Encoding
VIDEN[1:0]
Description
00b
VID is invalid
01b
VID for V
CC
10b
VID for V
NN
11b
Reserved