3. Radio Board Block Summary
3.1 Introduction
This section gives a short introduction to the blocks of the BRD4154A Radio Board.
3.2 Radio Board Block Diagram
The block diagram of the BRD4154A Radio Board is shown in the figure below.
Inverted-F
PCB
Antenna
2.4 GHz RF
UFL
Connector
LF
Crystal
32.768k
HF
Crystal
38.4M
Radio
Board
Connectors
8 Mbit
MX25R
Serial Flash
I2C
24AA0024
Serial EEPROM
Matching
Network &
Path
Selection
GPIO
UART
Debug
Packet Trace
AEM
I2C
SPI
SPI
2.4 GHz RF
2.4 GHz RF
EFM8
I/O Expander
I2C
Debug
GPIO
EFR32
EFR32
Wireless SoC
Figure 3.1. BRD4154A Block Diagram
3.3 Radio Board Block Description
3.3.1 Wireless MCU
The BRD4154A EFR32 Mighty Gecko Radio Board incorporates an EFR32MG1P732F256GM32 Wireless System on Chip featuring
32-bit Cortex-M4 with FPU core, 256 kB + 512 kB of flash memory and 32 kB of RAM and a 2.4 GHz band transceiver with output
power up to 19.5 dBm. For additional information on the EFR32MG1P732F256GM32, refer to the EFR32MG1 Data Sheet.
3.3.2 LF Crystal Oscillator (LFXO)
The BRD4154A Radio Board has a 32.768 kHz crystal mounted.
3.3.3 HF Crystal Oscillator (HFXO)
The BRD4154A Radio Board has a 38.4 MHz crystal mounted.
3.3.4 Matching Network for 2.4 GHz
The BRD4154A Radio Board incorporates a 2.4 GHz matching network which connects the 2.4 GHz TRX pin of the EFR32MG1 to the
one on-board printed Inverted-F antenna. The component values were optimized for the 2.4 GHz band RF performace and current con-
sumption with 19.5 dBm output power.
BRD4154A Reference Manual
Radio Board Block Summary
silabs.com
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