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NXP Semiconductors
JN-RM-2080
K32W module development reference manual
JN-RM-2080
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© NXP Semiconductors N.V. 2020. All rights reserved.
Reference manual
Rev. 1.0
— 27 Mar 2020
17 of 30
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Fig 15. VBAT decoupling
4.11 Traces Isolation
When PCB traces are in close proximity, they can talk to each other through the
capacitor created by these traces.
In order to minimize the effect of this parasitic coupling, identify the most sensitive traces
or areas (RF trace, oscillator, power lines, ...) and separate them from any signal that is
likely to couple with them through parasitics.
Separation between 2 lines can be achieved by increasing the distance from one to the
other.
4.12 GPIOs
The GPIOs traces are generally long lines that can cover long distances. They can
carry undesirable signals that are likely to radiate in any direction. It is recommended to
avoid routing these signals
4.13 Screening can
The K32W061/041
doesn’t radiate high spurs and it is very robust to EMC interferers so
there is in principle no need for a screening can (or shielding can). Nevertheless, a
footprint for a can has been added on the NXP modules and NXP recommends to add
this footprint to any PCB. In very specific cases under a very noisy environment it could
be helpful to add a can.
