SBC Axel SBC/Interfaces and Connectors/HDMI
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HDMI[edit | edit source]
Description[edit | edit source]
SBCX provides an HDMI 1.4a compatible interface, including the HDMI controller and PHY, routed to a standard HDMI Type A receptacle.
Signals[edit | edit source]
The following table describes the interface signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 1 | J10.125 | HDMI_D2P | TX pair 2 data + | |
| 3 | J10.123 | HDMI_D2N | TX pair 2 data - | |
| 4 | J10.121 | HDMI_D1P | TX pair 1 data + | |
| 6 | J10.119 | HDMI_D1N | TX pair 1 data - | |
| 7 | J10.117 | HDMI_D0P | TX pair 0 data + | |
| 9 | J10.115 | HDMI_D0N | TX pair 0 data - | |
| 10 | J10.113 | HDMI_CLKP | Tx pair clock + | |
| 12 | J10.111 | HDMI_CLKN | Tx pair clock - | |
| 13 | J10.127 | CE_REMOTE_OUT | Consumer Electric Control | |
| 15 | J10.101 | DDC_CLK_OUT | I2C clock | |
| 16 | J10.103 | DDC_DAT_OUT | I2C data | |
| 18 | - | 5V | +5V output | Internally limited to 135mA |
| 19 | J10.129 | HDMI_HP_OUT | Hotplug detection | |
| 2, 5, 8, 11, 17 |
- | DGND | Ground | |
| 14 | - | NC | Not connected | |
| 20, 21, 22, 23 |
- | SH_HDMI | Shield |
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.
