Signal Description
2.16
Power and Ground Signals
Nominal
Voltage
Interface
Ball Name
Description
VCC
VSS
VSS_NCTF1
1.05
0
Core supply
Ground
Common
VTT
1.05
1.5
1.5
1.8
1.5
Used for FSB input and output devices
Analog Power Supply
Host
VCCAHPLL
VCCDHPLL
Digital Power Supply
Driver and Rx supply
DDR2
VCCSM
Configurable for 1.8-V/1.5-V operation
Dedicated LVDS supply (must be supplied
even if the SDVO only interface is used).
VCCLVDS
1.5
Dedicated SDVO supply (must be supplied if
the interface is used. If SDVO is not used,
this supply is not needed for the Intel®
SCH).
VCCSDVO
1.5
SDVO/
PCIE/
LVDS
VCCPCIE
1.5
1.5
Dedicated PCIe* analog/digital supply
PCIe PLL
VCCAPCIEPLL
Band Gap (needs to be enabled for PCIe,
SDVO or LVDS)
VCCAPCIEBG
VSSAPCIEBG
3.3
0
PCIe Band Gap VSS
Display PLL A power supply (digital and
analog) Must be powered even if DPLLA is
not used.
VCCADPLLA
VCCADPLLB
1.5
1.5
Display PLL
Display PLL B power supply (digital and
analog) Must be powered even if DPLLB is
not used.
VCC15
1.5
3.3/1.5
3.3
Used for I/O digital logic
Intel High
Definition
Audio
VCCHDA
VCC33
Configurable for 3.3-V or 1.5-V operation
Used for some internal 3.3-V circuits
Used for I/O digital logic
VCC15
1.5
SDIO/MMC/
CMOS/LPC/
PATA
VCC33
3.3
Used for I/O analog driver
VCC5REF
5
Used for 5-V tolerance on core group inputs
USB PLL Supply. Must be powered even if
USB is not used
VCCAUSBPLL
1.5
VCC15USB
1.5
3.3
3.3
0
Power for USB Logic and Analogs.
USB 3.3-V Supply
VCCP33USBSUS
VCCAUSBBGSUS
VSSAUSBBGSUS
VCC5REFSUS
VCC33SUS
USB
USB Band Gap
USB Band Gap VSS
5
5-V Supply in Suspend Power Well
3.3-V Suspend Power Supply
Used for Real Time Clock
3.3
3.3
CMOS
Suspend
VCC33RTC
NOTE:
1.
NCTF (Non-Critical to Function) signals have been designed into the package footprint to
enhance the Solder Joint Reliability of our products. The NCTF signals have been designed
to absorb some of the stress introduced by the Characteristic Thermal Expansion (CTE)
Datasheet
45
INTEL [ INTEL ]
