u-blox XPLR-AOA-3, User Manual

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UBX-22006906 - R03 Page 18 of 44
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The highlighted areas in Figure 14 show the EVB-ANT-1 components involved in this use case.
Figure 14: EVB-ANT-1 components involved in antenna evaluation
High speed GPIOs from the onboard NINA-B411 module are broken out to a 20 pin (2x10), 2.54 mm
pitch header along with 5 V and 3.3 V power supplies. These GPIOs can be used to drive RF switches
that facilitate custom switching of the antenna array. The connector pinout is shown in
Figure 15 .
Table 1 shows the available signals on the antenna header. These signals are the same as those used
on the NINA-B411 hosted on ANT-Bxx antenna board. Access to these pins from the header pin make
it easier to test custom antenna boards.
NINA-B4 pin Pin name Header pin Note
IO 47 SWITCH_D0 4 High speed GPIO
IO 48 SWITCH_D1 8
IO 49 SWITCH_D2 12
IO 50 SWITCH_D3 16
IO 51 SWITCH_D4 18
IO 52 SWITCH_EN 12
IO 44 GPIO1 3 General purpose I/O
IO 46 GPIO2 7 General purpose I/O
IO 45 GPIO3 11 General purpose I/O
Table 1: Pins on the NINA-B411 connected to the custom antenna header
The RF signal can be connected to the antenna board through the onboard NINA-B4 U.FL connector,
with control signals as shown in
Figure 15 .
Ethernet
MCU
SDIO
MAYA-W1
UART
UART
SPI
GPIO
NINA-B4
GPIO
RF
UART
SPI
GPIO
FTDI
USB
UART
USB
ANT-Bxx
connector
Custom
Antenna
Board
FTDI USB
connector
ANT-Bxx
USB
connector
Ethernet
connector
(PoE+)
Power
controller
DC Power
connector
WiFi
Bluetooth
EVB-ANT-1