1.. _efr32_radio_brd4250b:
2
3EFR32 BRD4250B (SLWRB4250B)
4###########################
5
6Overview
7********
8
9The EFR32FG1 Flex Gecko 2.4 GHz and 868 MHz Radio Board is delivered as part of
10`SLWSTK6061B Proprietary Wireless Starter Kit`_. It contains a EFR32FG1 Wireless
11SoC built on an ARM Cortex®-M4F processor with excellent low power capabilities.
12
13.. figure:: ./efr32fg1-slwrb4250b.jpg
14   :height: 262px
15   :align: center
16   :alt: SLWRB4250B Flex Gecko 2.4 GHz and 868 MHz Radio Board
17
18   SLWRB4250B (image courtesy of Silicon Labs)
19
20The BRD4250B a.k.a. SLWRB4250B radio board plugs into the Wireless Starter Kit
21Mainboard BRD4001A and is supported as one of :ref:`efr32_radio`.
22
23Hardware
24********
25
26- EFR32FG1P133F256GM48 Flex Gecko SoC
27- CPU core: ARM Cortex®-M4 with FPU
28- Flash memory: 256 kB
29- RAM: 32 kB
30- Transmit power: up to +13 dBm
31- Operation frequency: 2.4 GHz, 868 MHz
32- 8Mbit SPI NOR Flash
33- Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz).
34
35For more information about the EFR32FG1 SoC and BRD4250B board, refer to these
36documents:
37
38- `EFR32FG1 Website`_
39- `EFR32FG1 Datasheet`_
40- `EFR32xG1 Reference Manual`_
41- `SLWSTK6061B Proprietary Wireless Starter Kit`_
42- `BRD4250B User Guide`_
43- `BRD4250B Reference Manual`_
44- `EFR32FG1-BRD4250B Schematics`_
45
46Supported Features
47==================
48
49Please refer to
50:ref:`EFR32 Radio Board Supported Features <efr32_radio_supported_features>`
51for details of the configuration and common features supported by the
52efr32_radio_brd4250b board.
53
54The default configuration can be found in the defconfig file:
55
56	``boards/arm/efr32_radio/efr32_radio_brd4250b_defconfig``
57
58System Clock
59============
60
61The EFR32FG1P SoC is configured to use the 38.4 MHz external oscillator on the
62board.
63
64Serial Port
65===========
66
67The EFR32FG1P SoC has two USARTs and one Low Energy UARTs (LEUART).
68USART0 is connected to the board controller and is used for the console.
69
70Programming and Debugging
71*************************
72
73Please refer to
74:ref:`Programming and Debugging EFR32 Radio Board <efr32_radio_programming>`
75for details on the supported debug interfaces.
76
77Flashing
78========
79
80Connect the BRD4001A board with a mounted BRD4250B radio module to your host
81computer using the USB port.
82
83Here is an example for the :ref:`hello_world` application.
84
85.. zephyr-app-commands::
86   :zephyr-app: samples/hello_world
87   :board: efr32_radio_brd4250b
88   :goals: flash
89
90Open a serial terminal (minicom, putty, etc.) with the following settings:
91
92- Speed: 115200
93- Data: 8 bits
94- Parity: None
95- Stop bits: 1
96
97Reset the board and you should see the following message in the terminal:
98
99.. code-block:: console
100
101   Hello World! efr32_radio_brd4250b
102
103
104.. _EFR32FG1 Website:
105   https://www.silabs.com/products/wireless/proprietary/efr32-flex-gecko-2-4-ghz-sub-ghz
106
107.. _EFR32FG1 Datasheet:
108   https://www.silabs.com/documents/public/data-sheets/efr32fg1-datasheet.pdf
109
110.. _EFR32xG1 Reference Manual:
111   https://www.silabs.com/documents/public/reference-manuals/efr32xg1-rm.pdf
112
113.. _SLWSTK6061B Proprietary Wireless Starter Kit:
114   https://www.silabs.com/products/development-tools/wireless/proprietary/slwstk6061b-efr32-flex-gecko-868-mhz-2-4-ghz-and-sub-ghz-starter-kit
115
116.. _BRD4250B User Guide:
117   https://www.silabs.com/documents/public/user-guides/ug182-brd4250b-user-guide.pdf
118
119.. _BRD4250B Reference Manual:
120   https://www.silabs.com/documents/public/reference-manuals/brd4250b-rm.pdf
121
122.. _EFR32FG1-BRD4250B Schematics:
123   https://www.silabs.com/documents/public/schematic-files/efr32fg1-brd4250b-b02-schematic.pdf
124