Design Note; Layout Requirement - Advantech SOM-ETX Series Design Manual

5.11.2 Design Note

5.11.2.1 Power Design Notes
In general design concept, keyboard and mouse should far away from audio and
VGA signal traces to avoid crosstalk.
SOM-ETX
KBCLK
KBDAT
MSCLK
MSDAT

5.11.3 Layout Requirement

5.11.3.1 KB/MS Power Trace
According to general keyboard and mouse power specification, the traces of
keyboard and mouse power trace should be route to afford 1A. The power can
source from system power plane through a ferrite bead and then a fuse. A capacitor
should be added behind and the ground of capacitor should place at
keyboard/mouse ground. A practical schematic is shown in figure 5.36.
Advantech SOM-ETX Design Guide
Figure 5-35 Keyboard and Mouse connection
Chapter 5 Carrier Board Design Guidelines
KB & MS Connector
Mini-dim
6P
Mini-dim
6P
101