
MSC SM2S-IMX8M User Manual
36 / 92
4.7 HDMI/DP
An on-module MUX/DEMUX provides HDMI and DisplayPort signal switching. Both interfaces
are available on the SMARC™ module and can be
selected via software. The two options are mutually exclusive.
Supported interfaces:
HDMI 2.0a up to 4096x2160
DisplayPort 1.3 up to 4096x2160
Table 4-7: HDMI/DP Signal Description
Signal
Pin Type
Signal
Level
Pin on
i.MX8M
Pin name on
i.MX8M
Power
Tolerance
PU/PD
Description
HDMI_D[0:2]+
HDMI_D[0:2]-
O
CML 3.3V
n.a.
n.a.
CML 3.3V spec.
HDMI differential pair signals
HDMI_CK-
O
CML 3.3V
n.a.
n.a.
CML 3.3V spec.
HDMI differential clock
HDMI_HPD
I
3.3V CMOS
W2
HDMI_HPD
5.5V
PD 100k
HDMI Hot Plug Detect
HDMI_CTRL_CK
O OD
1.8V CMOS
R3
HDMI_DDC_SCL
1.8V
PU 100k 1.8V
HDMI DDC clock line
HDMI_CTRL_DAT
I/O OD
1.8V CMOS
P3
HDMI_DDC_SDA
1.8V
PU 100k 1.8V
HDMI DDC data line
DP0_LANE[0:3]+
DP0_LANE[0:3]-
O
CML 3.3V
n.a.
n.a.
CML 3.3V spec.
DisplayPort differential pair signals
DP0_AUX -
O
CML 3.3V
n.a.
n.a.
CML 3.3V spec.
Auxiliary channel differential pair signals
DP0_HPD
I
3.3V CMOS
W2
HDMI_HPD
5.5V
PD 100k
DisplayPort Hot Plug Detect
DP0_AUX_SEL
I
1.8V CMOS
n.a.
n.a.
1.8V
Not used
DP1_AUX_SEL
I
1.8V CMOS
n.a.
n.a.
1.8V
Not used