ORCA SBC/Interfaces and Connectors/HDMI

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Version Issue Date Notes
1.0.0 Dec 2021 First release

HDMI interface[edit | edit source]

Description[edit | edit source]

The HDMI interface available on the Evaluation Kit at the connector J12, labelled as HDMI on the bottom.

J12 is a Mini HDMI horizontal receptacle connector.

HDMI connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
2 J15.98 HDMI_D2P TX pair 2 data +
3 J15.96 HDMI_D2N TX pair 2 data -
5 J15.94 HDMI_D1P TX pair 1 data +
6 J15.92 HDMI_D1N TX pair 1 data -
8 J15.90 HDMI_D0P TX pair 0 data +
9 J15.88 HDMI_D0N TX pair 0 data -
11 J15.86 HDMI_CLKP Tx pair clock +
12 J15.84 HDMI_CLKN Tx pair clock -
14 J15.74 CEC Consumer Electric Control
15 J15.76 SCL I2C clock
16 J15.78 SDA I2C data
18 - 5V +5V power output Internal 200mA fuse
19 J15.80/J15.104 HPD/HEAC- Hotplug detection / ARC-HEC
1, 4, 7, 10, 13 - DGND Ground
17 J15.102 HEAC+ HDMI Ethernet Audio Return Channel

Device mapping[edit | edit source]

HDMI video is mapped to the corresponding device driver in Linux, depending on the device tree configuration. If this is the only video output, then the default value is mapped to /dev/fb0.

Device usage[edit | edit source]

The associated framebuffer device is accessed in Linux through the standard graphic access.