OpenWrt Forum Archive

Topic: How to find JTAG pinout?

The content of this topic has been archived on 17 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

I am currently trying to find out the pinout for jtag on my router. I am wondering if there are any tricks in particular to find the pinout, and whether or not messing up the signals could damage the router. I am also wondering if any special precautions need to be taken as my router has gpio that goes to about 2.6v. Thanks

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That's the issue. I've already checked out that page, and the device I'm using has a non standard 8 pin (2 x 4) interface. I have for the most part figured out what each one is. I'm just wondering if there is a way to make sure they are correct as I manually traced them from the soc, and whether or not special care has to be taken as the interface is only at 2.6v on the pins.

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