8pin XTAG connection
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CharlesLee
- Newbie
- Posts: 1
- Joined: Wed May 14, 2014 9:10 am
8pin XTAG connection
I know your XTAG 2 has 20pin connection but I can't use all 20pins on my PCB because it is very small.So I want to replace to 8pin on the PCB. Please inform me of the pin diagram like that: (example) GND-1, RST-2, TRST-3, TMS-4, TCK-5, TDI-6, TDO-7, vCC-8
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sethu_jangala
- XCore Expert
- Posts: 589
- Joined: Wed Feb 29, 2012 10:03 am
The answer to the following question in the Q&A section explains about the required pins.http://www.xcore.com/questions/1791/are ... r-necessar...
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infiniteimprobability
- XCore Legend
- Posts: 1126
- Joined: Thu May 27, 2010 10:08 am
If you are looking for the exact pin mapping, then the section "JTAG-only xSYS header " in datasheet is what you need.
It describes the minimal connections to bring up JTAG, for downloading, flash programming and normal debugging. It's 7 signals plus ground. I follwed it yesterday on a custom board and can confirm it works a treat.
By the way, I really reccomend the optional full xsys header options (with the 4 lines for xscope connection). Fast printing to the console and xscope debugging is a very powerful (and addictive) tool - ideal for real time system debugging.
It describes the minimal connections to bring up JTAG, for downloading, flash programming and normal debugging. It's 7 signals plus ground. I follwed it yesterday on a custom board and can confirm it works a treat.
By the way, I really reccomend the optional full xsys header options (with the 4 lines for xscope connection). Fast printing to the console and xscope debugging is a very powerful (and addictive) tool - ideal for real time system debugging.