Silicon Labs BRD4183A Reference Manual
EFR32MG22 2.4 GHz 6 dBm Radio Board
BRD4183A Reference Manual
The BRD4183A Wireless
tooth® Low Energy applications. The board contains a 2.4 GHz Wireless Gecko Wire-
less System-on-Chip and is optimized for operating at 6 dBm output power. Radiated
and conducted testing is supported with the on-board printed antenna and UFL connector.
The BRD4183A Wireless Gecko Radio Board plugs into the Wireless Starter Kit Mainboard, which is included with the Wireless Gecko Starter Kit and gives access to debug
interface, Virtual COM port, packet trace, button, LED, and additional features from expansion boards. With the supporting Simplicity Studio suite of tools, developers can take
advantage of graphical wireless application development and visual energy profiling and
optimization. The board also serves as an RF reference design for applications targeting
2.4 GHz wireless operation with 6 dBm output power.
This document contains a brief introduction and description of the BRD4183A Radio
Board features, focusing on the RF sections and performance.
Gecko Radio Board enables developers to develop Blue-
RADIO BOARD FEATURES
• Wireless SoC:
EFR32MG22C224F512IM32
•
CPU core: ARM®
• Flash memory: 512 kB
• RAM: 32 kB
• Operation frequency: 2.4 GHz
• Transmit power: 6 dBm
• Integrated PCB antenna, UFL connector
(optional)
• Crystals for LFXO and HFXO: 32.768 kHz
and 38.4 MHz
• 8 Mbit low-power serial flash for over-theair updates
Cortex®-M33
silabs.com | Building a more connected world. Rev. 1.00
Table of Contents
1. Introduction ................................
4
2. Radio Board Connector ...........................5
2.1 Introduction ...............................5
2.2 Radio Board Connector Pin Associations .....................5
3. Radio Board Block Summary .........................6
3.1 Introduction ...............................6
3.2 Radio Board Block Diagram .........................6
3.3 Radio Board Block Description ........................6
3.3.1 Wireless MCU.............................6
3.3.2 LF Crystal Oscillator (LFXO) ........................6
3.3.3 HF Crystal Oscillator (HFXO)........................6
3.3.4 Matching Network for 2.4 GHz .......................6
3.3.5 UFL Connector ............................7
3.3.6 Radio Board Connectors .........................7
3.3.7 Inverted-F Antenna ...........................7
3.3.8 Serial EEPROM ............................7
4. RF Section ................................8
4.1 Introduction ...............................8
4.2 Schematic of the RF Matching Network......................8
4.2.1 Description of the 2.4 GHz RF Matching ....................8
4.3 Bill of Materials for the 2.4 GHz Matching .....................8
4.4 Inverted-F Antenna ............................9
5. Mechanical Details ............................ 10
6. EMC Compliance ..............................11
6.1 Introduction ...............................11
6.2 EMC Regulations for 2.4 GHz .........................11
6.2.1 ETSI EN 300-328 Emission Limits for the 2400-2483.5 MHz Band ...........11
6.2.2 FCC15.247 Emission Limits for the 2400-2483.5 MHz Band .............11
6.2.3 Applied Emission Limits for the 2.4 GHz Band ..................11
7. RF Performance ............................. 12
7.1 Conducted Power Measurements .......................12
7.1.1 Conducted Power Measurements with Unmodulated Carrier .............12
7.1.2 Conducted Power Measurements with Modulated Carrier ..............13
7.2 Radiated Power Measurements ........................13
7.2.1 Maximum Radiated Power Measurements ...................14
7.2.2 Antenna Pattern Measurements.......................14
8. EMC Compliance Recommendations ..................... 15
8.1 Recommendations for 2.4 GHz ETSI EN 300-328 Compliance ..............15
silabs.com | Building a more connected world. Rev. 1.00 | 2
8.2 Recommendations for 2.4 GHz FCC 15.247 Compliance ................15
9. Board Revision History .......................... 16
10. Errata................................. 17
11. Document Revision History ........................ 18
silabs.com | Building a more connected world. Rev. 1.00 | 3
BRD4183A Reference Manual
Introduction
1. Introduction
The EFR32™ Wireless Gecko Radio Boards provide a development platform (together with the Wireless Starter Kit Mainboard) for the
Silicon Labs EFR32 Wireless Gecko Wireless System-on-Chips and serve as reference designs for the matching network of the RF
interface.
The BRD4183A Radio Board is designed to operate in the 2400-2483.5 MHz band with the RF matching network optimized for operating at 6 dBm output power.
To develop and/or evaluate the EFR32 Wireless Gecko, the BRD4183A Radio Board can be connected to the Wireless Starter Kit Mainboard to get access to debug interface, Virtual COM port, packet trace, button, LED, and additional features from expansion boards,
and also to evaluate the performance of the RF interface.
silabs.com | Building a more connected world. Rev. 1.00 | 4
GND
F9 / PA00 / VCOM_RTS
3v3
NC / P36
P200
Upper Row
NC / P38
NC / P40
NC / P42
NC / P44
DBG_TMS_SWDIO / PA02 / F0
NC / F14
UIF_BUTTON0 / PB00 / F12
UIF_LED0 / PB01 / F10
VCOM_CTS / PB02 / F8
DBG_RESET / #RESET / F4
DBG_TDO_SWO / PA03 / F2
NC / F16
VCOM_TX / PA05 / F6
PTI_DATA / PC04 / F20
NC / F18
USB_VBUS
5V
Board ID SCL
GND
Board ID SDA
USB_VREG
F7 / PA06 / VCOM_RX
F5 / PA04 / VCOM_ENABLE
F3 / NC
F1 / PA01 / DBG_TCK_SWCLK
P45 / NC
P43 / NC
P41 / NC
P39 / NC
P37 / NC
F11 / NC
F13 / NC
F15 / NC
F17 / NC
F19 / PC05 / PTI_SYNC
F21 / NC
GND
VMCU_IN
NC / P0
P201
Lower Row
NC / P2
UIF_BUTTON0 / PB00 / P4
UIF_LED0 / PB01 / P6
GND
VRF_IN
P35 / NC
P7 / NC
P5 / NC
P3 / NC
P1 / NC
P33 / NC
P31 / NC
P29 / NC
P27 / PC05 / PTI_SYNC
P25 / PC04 / PTI_DATA
P23 / NC
P21 / PB02 / VCOM_CTS
P19 / NC
P17 / NC
P15 / NC
P13 / NC
P11 / PA06 / VCOM_RX
P9 / PA05 / VCOM_TX
NC / P34
NC / P32
NC / P30
NC / P28
NC / P26
NC / P24
VCOM_ENABLE / PA04 / P22
DBG_TDO_SWO / PA03 / P20
DBG_TMS_SWDIO / PA02 / P18
DBG_TCK_SWCLK / PA01 / P16
VCOM_RTS / PA00 / P14
NC / P12
NC / P10
NC / P8
BRD4183A Reference Manual
Radio Board Connector
2. Radio Board Connector
2.1 Introduction
The board-to-board connector scheme allows access to all EFR32MG22 GPIO pins as well as the RESETn signal. For more information on the functions of the available pins, see the EFR32MG22 data sheet.
2.2 Radio Board Connector Pin Associations
The figure below shows the mapping between the connector and the EFR32MG22 pins and their function on the Wireless Starter Kit
Mainboard.
Figure 2.1. BRD4183A Radio Board Connector Pin Mapping
silabs.com | Building a more connected world. Rev. 1.00 | 5
3. Radio Board Block Summary
Inverted-F
PCB
Antenna
2.4 GHz RF
UFL
Connector
LF
Crystal
32.768k
HF
Crystal
38.4M
Radio
Board
Connectors
I2C
24AA024
Serial
EEPROM
Matching
Network &
Output
Selection
GPIO
UART
Debug
Packet Trace
AEM
2.4 GHz RF
EFR32
EFR32
Wireless SoC
2.4 GHz RF
8 Mbit
MX25R
Serial Flash
SPI
3.1 Introduction
This section gives a short introduction to the blocks of the BRD4183A Radio Board.
3.2 Radio Board Block Diagram
The block diagram of the BRD4183A Radio Board is shown in the figure below.
BRD4183A Reference Manual
Radio Board Block Summary
Figure 3.1. BRD4183A Block Diagram
3.3 Radio Board Block Description
3.3.1 Wireless MCU
BRD4183A Wireless Gecko Radio Board incorporates an EFR32MG22C224F512IM32 Wireless System-on-Chip featuring 32-bit
The
Cortex®-M33 core, 512 kB of flash memory, 32 kB of RAM and a 2.4 GHz band transceiver with output power up to 6 dBm. For addi-
tional information on the EFR32MG22C224F512IM32, refer to the EFR32MG22 Data Sheet.
3.3.2 LF Crystal Oscillator (LFXO)
The BRD4183A 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 HF Crystal Oscillator (HFXO)
The BRD4183A Radio Board has a 38.4 MHz crystal mounted. For details regarding the crystal configuration, refer to application note
AN0016.2: Oscillator Design Considerations.
3.3.4 Matching Network for 2.4 GHz
The BRD4183A Radio Board incorporates a 2.4 GHz matching network which connects the 2.4 GHz RF input/output of the
EFR32MG22 to the one on-board printed Inverted-F antenna. The component values were optimized for the 2.4 GHz band RF performance and current consumption with 6 dBm output power.
silabs.com | Building a more connected world. Rev. 1.00 | 6
Loading...