User Manual

3. Radio Board Block Summary
3.1 Introduction
This section introduces the blocks of the BRD4310A Radio Board.
3.2 Radio Board Block Diagram
The block diagram of the BRD4310A Radio Board is shown in the figure below.
2.4 GHz RF
UFL
Connector
Radio
Board
Connectors
8 Mbit
MX25R
Serial Flash
I2C
24AA0024
Serial EEPROM
Path
Selection
GPIO
UART
Debug
Packet Trace
AEM
I2C
SPI
SPI
2.4 GHz RF
EFR32
xGM220S
Module
Chip
Antenna
RF In/Out
2.4 GHz RF
LF
Crystal
32.768k
Figure 3.1. BRD4310A Block Diagram
3.3 Radio Board Block Description
3.3.1 Wireless SiP
The BRD4310A Wireless Gecko Radio Board incorporates an BGM220SC12WGA2 Wireless Gecko module featuring 32-bit Cortex
®
-
M33 core, 352 kB of flash memory, 32 kB of RAM and a 2.4 GHz band transceiver with output power up to 0 dBm. For additional infor-
mation on the BGM220SC12WGA2, refer to the BGM220S data sheet.
3.3.2 LF Crystal Oscillator (LFXO)
The BRD4310A Radio Board has a 32.768 kHz crystal mounted. For details regarding the crystal configuration, refer to application note
AN0016.2: Oscillator Design Considerations.
3.3.3 UFL Connector
To perform conducted measurements, a UFL connector is added to the Radio Board. The connector allows an external 50 Ohm cable
or antenna to be connected during design verification or testing.
Note: By default, the 2.4 GHz RF input/output of the module is connected to the antenna input pin of the module by a series 0 Ohm
resistor. Connecting the RF input/output to the UFL connector supports conducted measurements, or the connection of an external an-
tenna. Move the series 0 Ohm resistor to the antenna to the position of the series resistor to the UFL connector (see the schematic of
the BRD4310A Radio Board for further details). On the layout, the footprints of these two resistors have overlapping pads to prevent
simultaneous connection of the antenna and the UFL connector.
BRD4310A Reference Manual
Radio Board Block Summary
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