Quote:
Originally Posted by geekmaster
The K4 and K5 have 1K series resistors (not pull-ups) on the Rx and Tx lines. Perhaps the K3 does too.
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Ah...
Quote:
Originally Posted by March 3rd, 2012
EDIT: Had a re-think of the above. If the SoC and this mystery chip are sharing the serial lines, those two resistors are in series with the serial line from the SoC to provide a bit of isolation between the two devices.
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That gimp'd photo shows the top layer buried traces.