cExpress-TL User’s Guide
PICMG COM.0 R3.0
Page 44
Copyright © 2021 ADLINK Technology, Inc.
4.4.3
DDI1 Port
Name
Pin #
Displayport (DP)
HDMI
DDI
DDI1_PAIR0-
D26
D27
DP
DP1_LANE0-
TMDS
TMDS1_DATA2-
DDI
DDI1_PAIR1-
D29
D30
DP
DP1_LANE1-
TMDS
TMDS1_DATA1-
DDI
DDI1_PAIR2-
D32
D33
DP
DP1_LANE2-
TMDS
TMDS1_DATA0-
DDI
DDI1_PAIR3-
D36
D37
DP
DP1_LANE3-
TM
TMDS1_CLK-
DDI
DDI1_PAIR4-
C25
C26
- -
DDI
DDI1_PAIR5-
C29
C30
- -
DDI
DDI1_PAIR6-
C15
C16
- -
DDI1_HPD C24
DP1_HPD
HDMI1_HPD
DDI1_CTRL D15
HMDI1_CTRLCLK
DDI1_CTRLCLK_AUX- D16
DP1_AUX-
HMDI1_CTRLDATA
DDI1_DDC_AUX_SEL D34
DDI1_DDC_AUX_SEL DDI1_DDC_AUX_SEL
Note
: Dual Mode (HDMI and DisplayPort on the same pins) implementations may be realized. This is desirable for SOCs that natively implement
this capability. With such SOCs, the primary Dual Mode implementation challenge is that the HDMI_CTRL_DAT and HDMI_CTRL_CK lines are DC
coupled, but the /- pair must be AC coupled. A set of FET switches is usually used to sort this out. The FET gates can be controlled by
the AUX_SEL pin function.