Radio Board Block Summary; Introduction; Radio Board Block Diagram; Radio Board Block Description - Silicon Laboratories BRD4305E Reference Manual

BRD4305E Reference Manual

Radio Board Block Summary

3. Radio Board Block Summary

3.1 Introduction

This section gives a short introduction to the blocks of the BRD4305E Radio Board.

3.2 Radio Board Block Diagram

The block diagram of the BRD4305E Radio Board is shown in the figure below.
I2C
UFL
Connector
GPIO
UART
Debug
EFR32
AEM
RF In/Out
2.4 GHz RF
Path
EFR32
Radio
Packet Trace Selection
Board
SiP Module Chip
2.4 GHz RF
Antenna
Connectors
SPI
8 Mbit
24AA0024
MX25R
LF
Serial Flash
Serial EEPROM
Crystal
Figure 3.1. BRD4305E Block Diagram

3.3 Radio Board Block Description

3.3.1 Wireless SiP

The BRD4305E Mighty Gecko Radio Board incorporates an MGM13S12F512GA Mighty Gecko MGM13S12 module featuring 32-bit
®
Cortex -M4 with FPU core, 512 kB of flash memory, 64 kB of RAM and a 2.4 GHz band transceiver with output power up to 18 dBm.
For additional information on the MGM13S12F512GA, refer to the MGM13S data sheet.

3.3.2 LF Crystal Oscillator (LFXO)

The BRD4305E Radio Board has a 32.768 kHz crystal mounted. For details regarding the crystal configuration, refer to Application
Note "AN0016.1: Oscillator Design Considerations".

3.3.3 UFL Connector

To be able to perform conducted measurements, Silicon Labs added a UFL connector 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 output of the matching network is connected to the printed inverted-F antenna by a series component. It can be
connected to the UFL connector as well through a series 0 Ohm resistor, which is not mounted by default. For conducted measure-
ments through the UFL connector, the series component to the antenna should be removed and the 0 Ohm resistor should be mounted
(see section for further details).
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