SLWRB4172A Silicon Labs

EFR32MG12 2400/490 MHz Dual Band 19 dBm Radio Board BRD4172A Reference Manual The BRD4172A Mighty Gecko Radio Board enables developers to develop Zigbee, RADIO BOARD FEATURES Thread, Bluetooth Low Energy and proprietary wireless applications. The board con- tains a dual-band Mighty Gecko Wireless System-on-Chip and it is optimized for operat- ing at 19 dBm output power. For the 2.4 GHz band with the on-board printed antenna Wireless SoC: EFR32MG12P433F1024GM48 and UFL connector, radiated and conducted testing is supported. For the 490 MHz CPU core: ARM Cortex -M4 with FPU band, the on-board SMA connector enables conducted testing and attachment of exter- nal whip antenna for radiated tests. Flash memory: 1024 kB RAM: 256 kB The BRD4172A Mighty Gecko Radio Board plugs into the Wireless Starter Kit Main- Operation frequency: 2.4 GHz + 490 MHz board, which is included with the Mighty Gecko Starter Kit and gives access to display, Transmit power: 19 dBm buttons, and additional features from Expansion Boards. With the supporting Simplicity Studio suite of tools, developers can take advantage of graphical wireless application 2.4 GHz: Integrated PCB antenna, UFL connector (optional) development, mesh networking debug and packet trace, and visual energy profiling and optimization. The board also serves as an RF reference design for applications targeting 490 MHz: Single SMA connector both for 2.4 GHz and 490 MHz dual band wireless operation with 19 dBm output power. transmit and receive Crystals for LFXO and HFXO: 32.768 kHz This document contains a brief introduction and description of the BRD4172A Radio and 38.4 MHz Board features, focusing on the RF sections and performance. 8 Mbit low-power serial flash for over-the- air updates 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 Sub-GHz......................6 3.3.5 Matching Network for 2.4 GHz ......................7 3.3.6 SMA Connector ...........................7 3.3.7 UFL Connector ...........................7 3.3.8 Radio Board Connectors ........................7 3.3.9 Inverted-F Antenna..........................7 3.3.10 Serial Flash ............................7 3.3.11 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 Sub-GHz RF Matching ..................8 4.2.2 Description of the 2.4 GHz RF Matching...................8 4.3 RF Section Power Supply..........................8 4.4 Bill of Materials for the sub-GHz Matching ....................8 4.5 Bill of Materials for the 2.4 GHz Matching ....................9 4.6 Inverted-F Antenna............................9 5. Mechanical Details .............................11 6. EMC Compliance............................. 12 6.1 Introduction...............................12 6.2 EMC Regulations for 490 MHz ........................12 6.2.1 AMR Emission Limits for the 470-510 MHz Band................12 6.3 ETSI EN 300-328 Emission Limits for the 2400-2483.5 MHz Band ............12 6.4 FCC15.247 Emission Limits for the 2400-2483.5 MHz Band ..............12 6.5 Applied Emission Limits for the 2.4 GHz Band...................13 7. RF Performance ............................. 14 7.1 Conducted Power Measurements .......................14 silabs.com Building a more connected world. Rev. 1.00 2