Allwinner A20 User Manual download pdf (Page 30)

LED Color Usage

Right Green Link status

Left Yellow Activity status

6.8 HDMI connector

The part of the schematic that describes the HDMI module is shown below:

Note that there are different Linux images depending whether the HDMI TV works at 50Hz or

60Hz refresh rate. If you board runs Android there is a specific option to set the appropriate HDMI

output.

HDMI connector

Pin # Signal name Processor pin Pin # Signal name Processor pin

1 HTX2P T23 11 GND -

2 GND - 12 HTXCN W22

3 HTX2N T22 13 HCEC P23

4 HTX1P U23 14 NA* NA

5 GND - 15 HSCL R23

6 HTX1N U22 16 HSDA R22

7 HTX0P U23 17 GND -

8 GND - 18 +5V -

9 HTX0N U22 19 HHPD P22

10 HTXCP W23

*Pin 14 of the HDMI is not mandatory. In HDMI 1.0-1.3c it is reserved pin; in HDMI 1.4+ it is

optional.

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Allwinner A20 User Manual Page 30