UM-B-074
DA1468x Range Extender Daughterboard
User Manual
Revision 1.1
17-Apr-2018
CFR0012
22 of 60
© 2018 Dialog Semiconductor
7.1.7
Antenna
DA14680/681 provides a single ended RFIO port, matched to 50
. The RF port consists of the
RFIOp and RFIOm pins, where RFIOm is connected to ground. A copper trace with impedance of
50
interconnects the RF port and the RFIN of SKY66112-11.
SKY66112-11 FEM provides two antenna outputs controlled by the ANT_SEL pin (GPIO P4_0) or it
can be hardware configured using a pull-down resistor (R53).
Table 12: SKY66112-11 Antenna Select Logic
Antenna Port
SKY66112-11 Pin
Antenna Select Signal
Usage
ANT1
8
ANT_SEL = 0
Connected to printed antenna
ANT2
6
ANT_SEL = 1
Connected to uFl connector
Figure 13: Antenna Selection Using P4_0 or a R53 Pull-Down Resistor
Figure 14: SKY66112-11 Antenna Ports
