ADLINK Technology COM Express Express-CFR, User Manual

Page: 33 / 108

Express-CFR
Pinouts and Signal Descriptions
27
DDI 2
Signal Pin Description I/O PU/PD Comment
DDI
DDI2_PAIR0-
DDI
DDI2_PAIR1-
DDI
DDI2_PAIR2-
DDI
DDI2_PAIR3- D39
D40
D42
D43
D46
D47
D49
D50 Digital Display Interface2
differential pairs O PCIE
DDI2_HPD D44 I 3.3V PD
100K
If DDI2_DDC_AUX_SEL is floating I/O PCIE PD
100K AC couple on Module
DDI2_CTRL
C32
If DDI2_DDC_AUX_SEL pulled
high I/O OD
3.3V HDMI2_CTRLCLK
PU 2.2K 3.3V when
DDC_AUX_SEL is high
If DDI2_DDC_AUX_SEL is floating I/O PCIE PU
100K
3.3V AC couple on Module
DP2_AUX- DDI2_CTRLDATA_AUX- C33
If DDI2_DDC_AUX_SEL pulled
high I/O OD
3.3V HDMI2_CTRLDATA
PU 2.2K 3.3V when
DDC_AUX_SEL is high
DDI2_DDC_AUX_SEL C34 Selects the function of
DDI2_CTRL and
DDI2_CTRLDATA_AUX-. This pin
shall have a 1M pull-down to logic
ground on the Module. If this input
is floating the AUX pair is used for
the DP AUX+/- signals. If pulled-
high the AUX pair contains the
CRTLCLK and CTRLDATA signals.
I 3.3V PD 1M