Altrernative Raspberry I2C connector

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Richard-TX
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Altrernative Raspberry I2C connector

Post by Richard-TX » 12.12.2013, 03:39

I have decided to do my own connectors for I2C and the Raspberry Pi. I picked the RJ45.

Here is my pinout. Note that even if the connector is crimped on backwards, no shorts occur.

Also the data lines are twisted pairs with ground to help minimize interference.

Common network patch cables can be used provided that they adhere to the 568B or 568A standard.
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rjversluis
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Post by rjversluis » 12.12.2013, 17:15

Why not using the same as the GCA-Pi* RJ45 connectors?

Richard-TX
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Post by Richard-TX » 12.12.2013, 17:45

Two reasons.

1 - A mistake when making a patch cable like flipping the connector over does not result in shorts.

2 - The signal lines are a twisted pair with ground. NXP recommends that configuration.

http://www.nxp.com/documents/applicatio ... N10658.pdf

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