Ddi Channels - ADLINK Technology COM Express Express-BL User Manual

3.4.3.

DDI Channels

DDI 1
Signal
DDI1_PAIR0+
DDI1_PAIR0-
DDI1_PAIR1+
DDI1_PAIR1-
DDI1_PAIR2+
DDI1_PAIR2-
DDI1_PAIR3+
DDI1_PAIR3-
DDI1_PAIR4+
DDI1_PAIR4-
DDI1_PAIR5+
DDI1_PAIR5-
DDI1_PAIR6+
DDI1_PAIR6-
DDI1_HPD
DDI1_CTRLCLK_AUX+
DDI1_CTRLDATA_AUX-
DDI1_DDC_AUX_SEL
Pin Description
D26 Digital Display Interface1 differential pairs O PCIE
D27
D29
D30
D32
D33
D36
D37
C25
C26
C29
C30
C15
C16
C24 Digital Display Interface Hot-Plug Detect
D15 IF DDI1_DDC_AUX_SEL is floating
IF DDI1_DDC_AUX_SEL pulled high
D16 IF DDI1_DDC_AUX_SEL is floating
IF DDI1_DDC_AUX_SEL pulled high
D34 Selects the function of
DDI1_CTRLCLK_AUX+ and
DDI1_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/O PU/PD Comment
Pair 4 to Pair 6
Not supported
I 3.3V PD 100K
I/O PCIE PD 100K DP1_AUX+
I/O OD 3.3V HDMI1_CTRLCLK
PU 2.2K 3.3V when
DDC_AUX_SEL is high
I/O PCIE PU 100K DP1_AUX-
3.3V
I/O OD 3.3V HDMI1_CTRLDATA
PU 2.2K 3.3V when
DDC_AUX_SEL is high
I 3.3V PD 1M
Express-BL
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