15 Jun '13, 5pm

@skieft

@skieft

So where is JHDMI pin 3 connected to the Micro HDMI and USB connectors? Well I decided to go through the long process of analyzing the cable assembly that connects JHDMI to the Micro HDMI and USB connectors. In hindsight, this was not needed to solve my problem of getting Lapdock running, but I didn't know what the solution was going to be and I wanted to rule out other possibilities. So using an ohmmeter setting and a safety pin so I could probe tiny micro HDMI contacts, here is what I came up with. The first number on each line is the JHDMI pin. HDMI pins are designated Ax for full-size type A and Dx for Micro type D. Wikipedia lists the HDMI signals -- they're also in a white paper from HDMI Licensing. The cable assembly shorts the HDMI connector shell to all the individual HDMI grounds pins except for DDC/CEC ground.

Full article: http://www.element14.com/community/groups/raspberry-pi/bl...

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