.. zephyr:board:: xg28_rb4401c

Overview

The EFR32ZG28 Radio Board is the radio board delivered with xG28-PK6025A Website_. It contains a Wireless System-On-Chip from the EFR32ZG28 family built on an ARM Cortex®-M33 processor with excellent low power capabilities.

The BRD4401C a.k.a. xG28-RB4401C radio board plugs into the Wireless Pro Kit Mainboard BRD4002A and is supported as one of :ref:silabs_radio_boards.

Hardware

EFR32ZG28B322F1024IM68 SoC
CPU core: ARM Cortex®-M33 with FPU
Flash memory: 1024 kB
RAM: 256 kB
Transmit power: up to +20 dBm
Operation frequency: 868-915 MHz
Crystals for LFXO (32.768 kHz) and HFXO (39 MHz).
Silicon Labs Si7021 relative humidity and temperature sensor
Low-power 128x128 pixel Memory LCD
Macronix ultra low power 8-Mbit SPI flash (MX25R8035F)

For more information about the EFR32ZG28 SoC and BRD4401C board, refer to these documents:

EFR32ZG28 Website_
EFR32ZG28 Datasheet_
EFR32xG28 Reference Manual_
XG28-PK6025A Website_
BRD4401C User Guide_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

In the following table, the column Name contains Pin names. For example, PA2 means Pin number 2 on PORTA, as used in the board's datasheets and manuals.

+-------+--------------+-------------------------------------+ | Name | Function | Usage | +=======+==============+=====================================+ | PA8 | UART_TX | UART Console TX | +-------+--------------+-------------------------------------+ | PA9 | UART_RX | UART Console RX | +-------+--------------+-------------------------------------+ | PB1 | GPIO | Push Button 0 | +-------+--------------+-------------------------------------+ | PB2 | GPIO | LED0 | +-------+--------------+-------------------------------------+ | PB3 | GPIO | Push Button 1 | +-------+--------------+-------------------------------------+ | PC1 | US1_TX | Display/Flash SPI MOSI | +-------+--------------+-------------------------------------+ | PC2 | US1_RX | Serial Flash MISO | +-------+--------------+-------------------------------------+ | PC3 | US1_CLK | Serial Flash/Display SPI Clock | +-------+--------------+-------------------------------------+ | PC4 | US1_CS | Serial Flash Chip Select | +-------+--------------+-------------------------------------+ | PC5 | I2C0_SCL | Si7021 I2C Clock | +-------+--------------+-------------------------------------+ | PC6 | GPIO | External COM Inversion Signal | +-------+--------------+-------------------------------------+ | PC7 | I2C0_SDA | Si7021 I2C Data | +-------+--------------+-------------------------------------+ | PC8 | US1_CS | Display Serial Chip Select | +-------+--------------+-------------------------------------+ | PC9 | GPIO | Display Control Access | +-------+--------------+-------------------------------------+ | PC11 | GPIO | Si7021 Enable | +-------+--------------+-------------------------------------+ | PD3 | GPIO | LED1 | +-------+--------------+-------------------------------------+

The default configuration can be found in :zephyr_file:boards/silabs/radio_boards/xg28_rb4401c/xg28_rb4401c_defconfig

System Clock

The EFR32ZG28 SoC is configured to use the 39 MHz external oscillator on the board.

Serial Port

The EFR32ZG28 SoC has one USART and three EUSARTs. USART0 is connected to the board controller and is used for the console.

Programming and Debugging

.. zephyr:board-supported-runners::

Flashing

Connect the BRD4002A board with a mounted BRD4401C radio module to your host computer using the USB port.

Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: xg28_rb4401c :goals: flash

Open a serial terminal (minicom, putty, etc.) with the following settings:

Speed: 115200
Data: 8 bits
Parity: None
Stop bits: 1

Reset the board and you should see the following message in the terminal:

.. code-block:: console

Hello World! xg28_rb4401c/efr32zg28b322f1024im68

.. _xG28-PK6025A Website: https://www.silabs.com/development-tools/wireless/efr32xg28-pro-kit-20-dbm

.. _BRD4401C User Guide: https://www.silabs.com/documents/public/user-guides/ug535-xg28-20dbm-user-guide.pdf

.. _EFR32ZG28 Website: https://www.silabs.com/wireless/z-wave/efr32zg28-z-wave-800-socs

.. _EFR32ZG28 Datasheet: https://www.silabs.com/documents/public/data-sheets/efr32zg28-datasheet.pdf

.. _EFR32xG28 Reference Manual: https://www.silabs.com/documents/public/reference-manuals/efr32xg28-rm.pdf