XTAG-2 and XS1-L1-48pin compatibilty

Technical discussions related to any XMOS development kit or reference design. Eg XK-1A, sliceKIT, etc.
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eladmmor
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XTAG-2 and XS1-L1-48pin compatibilty

Postby eladmmor » Fri Jun 01, 2012 12:43 pm

Hello!
First, I would like to make sure that the XTAG-2 interface is compatible with the XS1-L1 48 package, because (1) is stating that
The XTAG-2 is based on a single XS1-L1 device in a 64LQFP package.


Assuming that the answer for the above is positive:
XS1-L1 package does not contain a 'debug' port. Therefore, I am looking for the correct way to terminate the incoming 'debug' line from the header to the board. This line is defined as bidirectional in (1). Combining the schematics of XTAG-2 (2) and audio RD (3), it seems that unused incoming port are just left not-connected. Can someone verify this?

(1)https://www.xmos.com/download/public/XTAG-2-Hardware-Manual%281.0%29.pdf.
(2)https://www.xmos.com/download/private/XTAG-Schematics%281.0.4%29.pdf
(3)https://www.xmos.com/download/public/USB-Audio-2.0-Ref-Design-XS1-L1-Hardware-Manual-%281v1%29%281.0%29.pdf

Thanks and have a good weekend! Elad.
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Bianco
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Postby Bianco » Fri Jun 01, 2012 12:49 pm

Hello eladmmor,

The XTAG2 itself is based on a XS1-L1-64 but it can be used to debug all XMOS devices with JTAG.

If the target device does not have a debug pin, you can leave the debug pin on the XTAG2 header unconnected.

Please also note that you do not need to connect the UART and XMOS Link lines if you do not want to use it. (The XMOS Link on the XTAG2 adapter cannot be used to connect to XS1-G devices)

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