cExpress-AL
Pinouts and Signal Descriptions
25
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
DDI2_HPD D44
PD
100K
IF DDI2_DDC_AUX_SEL is floating
I/O PCIe
PD
100K
AC coupled on Module
DDI2_CTRL
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_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.
PD
1M
DDI 3 (not supported on this product)
Signal
Pin
Description
I/O
PU/PD
Comment
DDI
DDI3_PAIR0-
DDI
DDI3_PAIR1-
DDI
DDI3_PAIR2-
DDI
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
; AC coupled on
Module
DDI3_CTRL
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
Содержание cExpress-AL
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