TOBY-R2 series - System integration manual
UBX-16010572 - R10
Design-in
Page 117 of 151
2.9
Reserved pins (RSVD)
TOBY-R2 series modules have pins reserved for future use, marked as RSVD. All the RSVD pins are to
be left unconnected on the application board except the following RSVD pins as described in
the RSVD pin number 6 that must be externally connected to ground
the RSVD pin number 18 that is recommended to be connected to a Test-Point for diagnostic
access
the RSVD pin number 19 that is recommended to be connected to a Test-Point for diagnostic
access
TOBY-R2 series
RSVD
6
RSVD
Test-Point
18
RSVD
19
RSVD
Test-Point
Figure 66: Application circuit for the reserved pins (RSVD)
2.10
Module placement
An optimized placement allows a minimum RF line’s length and closer path from DC source for VCC.
Make sure that the module, analog parts and RF circuits are clearly separated from any possible
source of radiated energy. In particular, digital circuits can radiate digital frequency harmonics, which
can produce Electro-Magnetic Interference that affects the module, analog parts and RF circuits’
performance. Implement proper countermeasures to avoid any possible Electro-Magnetic
Compatibility issue.
Make sure that the module, RF and analog parts / circuits, and high speed digital circuits are clearly
separated from any sensitive part / circuit which may be affected by Electro-Magnetic Interference,
or employ countermeasures to avoid any possible Electro-Magnetic Compatibility issue.
Provide enough clearance between the module and any external part.
☞
The heat dissipation during continuous transmission at maximum power can significantly raise
the temperature of the application base-board below the TOBY-R2 series modules: avoid placing
temperature sensitive devices close to the module.