VCCPLL

1.05 V

Processor PLL power rails

VCCST

1.05 V

Sustain voltage for processor

standby modes

VCC1P05_​OUT

1.05 V

FIVR Output of PCH to platform 1.05 V Power Gates

VCCSTG

1.05 V

Gated sustain voltage for processor standby modes

VCCSTG_​OUT

1.05 V

VCCSTG_​OUT Power rail

VCCLDOSTD_​0P85

0.85 V

This rail is generated internally and needs to be routed out to the motherboard for decoupling purpose.

VCCPRIM_​1P05

1.05 V

1.05 V Primary rail

VCCA_​CLKLDO_​1P8

1.8 V

Analog supply for internal clocks

VCCDPHY_​1P24

1.24 V

1.24 V rail for DPHY

VCCPGPPR

1.8 V / 3.3 V

VCC_​PGPPR is sourced from either VCC_​3P3A or VCC1P8A rail and this rail is input supply for the GP_​R GPIOs.

VCC1P8A

1.8 V

1.8A rail. This rail is turned off when either PMC_​CPU_​C10_​GATE_​N or PMC_​SLP_​S3_​N is asserted (LOW). Thus, this rail is off in package C10 state as well as S3 - S5 states.

VCCRTC

3 V

RTC Well Supply. This rail can drop to 2.0 V if all other planes are off. This power is not expected to be shut off unless the RTC battery is removed or drained.

VCCPLL_​OC

1.1 V/1.2 V

Processor PLLs power rails

VCCSPI

3.3 V or 1.8 V

SPI Primary Well 3.3 V or 1.8 V. If powered at 3.3 V, the 3.3 V supply can come from VCCPRIM_​3P3 supply. If powered at 1.8 V, the 1.8 V supply can come from VCCPRIM_​1P8 supply.

VCCDSW_​3P3

3.3 V

3.3 V Deep Sx Well.