User Guide

Electrical Specifications
122 Datasheet, Volume 1 of 2
7.2.2.3 PCI Express* Graphics (PEG) DC Specifications
7.2.2.4 Digital Display Interface (DDI) DC Specifications
7.2.2.5 embedded DisplayPort* (eDP*) DC Specification
Table 7-12. PCI Express* Graphics (PEG) Group DC Specifications
Symbol Parameter Min Typ Max Units Notes
1
Z
TX-DIFF-DC
DC Differential Tx Impedance 80 100 120  1, 5
Z
RX-DC
DC Common Mode Rx Impedance 40 50 60  1, 4
Z
RX-DIFF-DC
DC Differential Rx Impedance 80 — 120  1
PEG_RCOMP resistance compensation 24.75 25 25.25  2, 3
Notes:
1. Refer to the PCI Express Base Specification for more details.
2. Low impedance defined during signaling. Parameter is captured for 5.0 GHz by RLTX-DIFF.
3. PEG_RCOMP resistance should be provided on the system board with 1% resistors. COMP resistors are to V
CCIO
.
PEG_RCOMP- Intel allows using 24.9  1% resistors.
4. DC impedance limits are needed to ensure Receiver detect.
5. The Rx DC Common Mode Impedance should be present when the Receiver terminations are first enabled to ensure that
the Receiver Detect occurs properly.Compensation of this impedance can start immediately and the 15 Rx Common Mode
Impedance (constrained by RLRX-CM to 50  ±20%) should be within the specified range by the time Detect is entered.
Table 7-13. Digital Display Interface Group DC Specifications (DP/HDMI)
Symbol Parameter Min Typ Max Units Notes
1
V
OL
DDIB_TXC[3:0] Output Low Voltage
DDIC_TXC[3:0] Output Low Voltage
DDID_TXC[3:0] Output Low Voltage
— — 0.25*V
CCIO
V1,2
V
OH
DDIB_TXC[3:0] Output High Voltage
DDIC_TXC[3:0] Output High Voltage
DDID_TXC[3:0] Output High Voltage
0.75*V
CCIO
——V1,2
Z
TX-DIFF-DC DC Differential Tx Impedance 80 100 120 
Notes:
1. Vcc
IO
depends on segment.
2. V
OL
and V
OH
levels depends on the level chosen by the Platform.
Table 7-14. embedded DisplayPort* (eDP*) Group DC Specifications
Symbol Parameter Min Typ Max Units
V
OL
eDP_DISP_UTIL Output Low Voltage — — 0.1*V
CCIO
V
V
OH
eDP_DISP_UTIL Output High Voltage 0.9*Vcc
IO
—— V
R
UP
eDP_DISP_UTIL Internal pull-up 100 — — 
R
DOWN
eDP_DISP_UTIL Internal pull-down 100 — — 
eDP_RCOMP eDP resistance compensation 24.75 25 25.25 
Z
TX-DIFF-DC DC Differential Tx Impedance 80 100 120 
Notes:
1. COMP resistance is to VCOMP_OUT.
2. eDP_RCOMP resistor should be provided on the system board.