Am 21. Oktober 2015 21:52:39 MESZ, schrieb "Jörg Wunsch" 
<j...@uriah.heep.sax.de>:

>You could try fiddling a custom cable with serial terminators (about 
>100 ohms) on each driving (tx) side of a line (TDO, TCK, TDI) to reduce
>ringing.

Sorrry, that was related to JTAG which has dedicated signal lines.  PDI uses 
the data line bidirectionally, so it is difficult to terminate at the tx side. 
Maybe it already helps to insert the resistor into the PDCLK line.


-- 
Viele Grüße, Jörg

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