ADLINK Technology cExpress-AL - Page 31

cExpress-AL
Pinouts and Signal Descriptions 25
DDI 2
Signal Pin Description I/O PU/PD Comment
DDI2_PAIR0+
DDI2_PAIR0-
DDI2_PAIR1+
DDI2_PAIR1-
DDI2_PAIR2+
DDI2_PAIR2-
DDI2_PAIR3+
DDI2_PAIR3-
D39
D40
D42
D43
D46
D47
D49
D50
Digital Display Interface2 differential pairs
DDI2_HPD D44
PD
100K
IF DDI2_DDC_AUX_SEL is floating I/O PCIe
PD
100K
DP2_AUX+
AC coupled on Module
DDI2_CTRLCLK_AUX+ C32
IF DDI2_DDC_AUX_SEL pulled high
I/O OD
3.3V
HDMI2_CTRLCLK
PU 10k 3.3V
IF DDI2_DDC_AUX_SEL is floating I/O PCIe
PU
100K
3.3V
DP2_AUX-
AC coupled on Module
DDI2_CTRLDATA_AUX- C33
IF DDI2_DDC_AUX_SEL pulled high
I/O OD
3.3V
HDMI2_CTRLDATA
PU 10k 3.3V
DDI2_DDC_AUX_SEL C34
Selects the function of
DDI2_CTRLCLK_AUX+ 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.
PD 1M
DDI 3 (not supported on this product)
Signal Pin Description I/O PU/PD Comment
DDI3_PAIR0+
DDI3_PAIR0-
DDI3_PAIR1+
DDI3_PAIR1-
DDI3_PAIR2+
DDI3_PAIR2-
DDI3_PAIR3+
DDI3_PAIR3-
C39
C40
C42
C43
C46
C47
C49
C50
Digital Display Interface3 differential
pairs
DDI3_HPD C44
PD
100K
IF DDI3_DDC_AUX_SEL is floating I/O PCIe
PD
100K
DP3_AUX+; AC coupled on
Module
DDI3_CTRLCLK_AUX+ C36
IF DDI3_DDC_AUX_SEL pulled high
I/O OD
3.3V
HDMI3_CTRLCLK; PU 10k
3.3V
IF DDI3_DDC_AUX_SEL is floating I/O PCIe
PU
100K
3.3V
DP3_AUX-; AC coupled on
Module
DDI3_CTRLDATA_AUX- C37
IF DDI3_DDC_AUX_SEL pulled high
I/O OD
3.3V
HDMI3_CTRLDATA; PU
10k 3.3V