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The Digital Display Interface (DDI) signals are multiplexed with HDMI and DisplayPort (DP). The signals for these interfaces are routed to the
DDI interface of the COM Express connector. Refer to the HDMI and DisplayPort signal description tables in this section for information about
the signals routed to the DDI interface of the COM Express connector.
Table 26 HDMI Signal Descriptions
Signal
Pin # Description
I/O
PU/PD Comment
TMD
TMDS1_CLK -
D36
D37
HDMI/DVI TMDS Clock output differential pair.
Multiplexed with DDI and DDI1_PAIR3-.
O PCIE
TMDS
TMDS1_DATA0-
D32
D33
HDMI/DVI TMDS differential pair.
Multiplexed with DDI and DDI1_PAIR2-.
O PCIE
TMDS
TMDS1_DATA1-
D29
D30
HDMI/DVI TMDS differential pair.
Multiplexed with DDI and DDI1_PAIR1-..
O PCIE
TMDS
TMDS1_DATA2-
D26
D27
HDMI/DVI TMDS differential pair.
Multiplexed with DDI and DDI1_PAIR0-.
O PCIE
HDMI1_HPD
C24
HDMI/DVI Hot-plug detect.
Multiplexed with DDI1_HPD.
I PCIE
PD 1M
HDMI1_CTRLCLK
D15
HDMI/DVI I
2
C Control Clock
Multiplexed with DDI1_CTRL
I/O OD
3.3V
PD 100k
HDMI1_CTRLDATA
D16
HDMI/DVI I
2
C Control Data
Multiplexed with DDI1_CTRLDATA_AUX-
I/O OD
3.3V
PU 100k
3.3V
HDMI1_CTRLDATA is a boot strap signal (see note below).
HDMI enable strap already populated
TMD
TMDS2_CLK -
D49
D50
HDMI/DVI TMDS Clock output differential pair..
Multiplexed with DDI and DDI2_PAIR3-.
O PCIE
TMDS
TMDS2_DATA0-
D46
D47
HDMI/DVI TMDS differential pair.
Multiplexed with DDI and DDI2_PAIR2-.
O PCIE
TMDS
TMDS2_DATA1-
D42
D43
HDMI/DVI TMDS differential pair.
Multiplexed with DDI and DDI2_PAIR1-.
O PCIE
TMDS
TMDS2_DATA2-
D39
D40
HDMI/DVI TMDS differential pair.
Multiplexed with DDI and DDI2_PAIR0-..
O PCIE
HDMI2_HPD
D44
HDMI/DVI Hot-plug detect.
Multiplexed with DDI2_HPD
I PCIE
PD 1M
HDMI2_CTRLCLK
C32
HDMI/DVI I
2
C Control Clock
Multiplexed with DDI2_CTRL
I/O OD
3.3V
PD 100k
HDM12_CTRLDATA
C33
HDMI/DVI I
2
C Control Data
Multiplexed with DDI2_CTRLDATA_AUX-
I/O OD
3.3V
PU 100k
3.3V
HDMI2_CTRLDATA is a boot strap signal (see note below).
HDMI enable strap is already populated.
TMD
TMDS3_CLK -
C49
C50
HDMI/DVI TMDS Clock output differential pair..
Multiplexed with DDI and DDI3_PAIR3-.
O PCIE
TMDS
TMDS3_DATA0-
C46
C47
HDMI/DVI TMDS differential pair.
Multiplexed with DDI and DDI3_PAIR2-.
O PCIE