cExpress-TL User’s Guide
PICMG COM.0 R3.0
Page 51
Copyright © 2021 ADLINK Technology, Inc.
4.4.5.1.
Displayport (DP) Mode
Name
Pin #
Description
I/O
PU / PD
Comment
DP
DP3_LANE0-
DP
DP3_LANE1-
DP
DP3_LANE2-
DP
DP3_LANE3-
C39
C40
C42
C43
C46
C47
C49
C50
DP Port 3, differential pair data lines
O PCIE
AC coupled off Module
100 nF DC blocking capacitors
shall
be placed on
the Carrier
DP3_HPD C44
DP Port 3, detection of Hot Plug / Unplug and
notification of the link layer
I 3.3V
PD 100K
Module must tolerate high level in stand-by mode.
The carrier board shall include a blocking FET on
DP1_HPD to prevent back-drive current from
damaging the Module.
C36
DP Port 3, Bidirectional Channel used for Link
Management and Device Control
I/O PCIE
PD 100K
AC coupled on Module
DP3_AUX- C37
DP Port 3, Bidirectional Channel used for Link
Management and Device Control
I/O PCIE
PU 100K
AC coupled on Module
DDI3_DDC_AUX_SEL C38 Strapping Signal to select HDMI or DP output
1M pull-down to logic ground enables HDMI
Floating enables Displayport mode
I 3.3V
PD 1M
DP mode enabled