RAK11720

Board Overview

RAK11720

Name:

rak11720

Vendor:

RAKwireless Technology Limited

Architecture:

arm

SoC:

apollo3_blue

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The RAK11720 is a WisBlock Core module for RAK WisBlock. It is based on the powerful ultra-low power Apollo3 Blue SoC (AMA3B1KK-KBR-B0) from Ambiq together with a Semtech SX1262 LoRa® transceiver.

The AMA3B1KK-KBR-B0 has an integrated Bluetooth Low Energy transceiver that enhances the communication capabilities. The RAK11720 stamp module comes in the same size and footprint as our RAK3172 module which gives you the opportunity to enhance your existing designs with BLE without designing a new PCB.

Hardware

The easiset way to use a RAK11720, is the WisBlock Modular system. A WisBlock Base board (RAK19007) which provides the power supply and programming/debug interface is the base to plug a RAK11722 (WisBlock Core module with the RAK11720) in.

• Apollo3 Blue SoC with up to 96 MHz operating frequency

• ARM® Cortex® M4F core

• 16 kB 2-way Associative/Direct-Mapped Cache per core

• Up to 1 MB of flash memory for code/data

• Up to 384 KB of low leakage / low power RAM for code/data

• Integrated Bluetooth 5 Low-energy controller

• Semtech SX1262 low power high range LoRa transceiver

• iPEX connectors for the LORA antenna and BLE antenna.

• 2 user LEDs on RAK19007 WisBlock Base board

• Powered by either Micro USB, 3.7V rechargeable battery or a 5V Solar Panel Port

For more information about the RAK11720 stamp module:

• WisDuo RAK11720 Website

• WisBlock RAK11722 Website

Supported Features

The rak11720 board supports the hardware features listed below.

on-chip / on-board

Feature integrated in the SoC / present on the board.

2 / 2

Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.

vnd,foo

Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

rak11720

/

apollo3_blue

rak11720/apollo3_blue target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M4F CPU1	arm,cortex-m4f
ADC	on-chip	Ambiq ADC node1	ambiq,adc
Bluetooth	on-chip	Bluetooth module that uses Ambiq’s Bluetooth Host Controller Interface SPI driver (e.g1	ambiq,bt-hci-spi
Clock control	on-chip	Generic fixed-rate clock provider1	fixed-clock
Counter	on-chip	Ambiq Timer/Counter8	ambiq,counter
Debug	on-chip	ARMv7 instrumentation trace macrocell1	arm,armv7m-itm
Flash controller	on-chip	Ambiq flash controller1	ambiq,flash-controller
GPIO & Headers	on-chip	Ambiq GPIO provides the GPIO pin mapping for GPIO child nodes1	ambiq,gpio
	on-chip	Ambiq GPIO bank2	ambiq,gpio-bank
I2C	on-chip	Ambiq I2C1 5	ambiq,i2c
Interrupt controller	on-chip	ARMv7-M NVIC (Nested Vectored Interrupt Controller)1	arm,v7m-nvic
LED	on-board	Group of GPIO-controlled LEDs1	gpio-leds
LoRa	on-board	Semtech SX1262 LoRa Modem1	semtech,sx1262
MTD	on-chip	Flash node1	soc-nv-flash
	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	fixed-partitions
Pin control	on-chip	The Ambiq Apollo3 pin controller is a node responsible for controlling pin function selection and pin properties, such as routing a UART0 TX to pin 60 and enabling the pullup resistor on that pin1	ambiq,apollo3-pinctrl
Power management	on-chip	Ambiq power control1	ambiq,pwrctrl
RTC	on-chip	AMBIQ RTC1	ambiq,rtc
Serial controller	on-chip	Ambiq UART controller (PL011 compatible)1 1	ambiq,uart
SPI	on-chip	Ambiq SPI Device1	ambiq,spid
	on-chip	Ambiq SPI2 4	ambiq,spi
	on-chip	Ambiq MSPI1	ambiq,mspi
	on-chip	This binding gives a representation of SPI controller in some Ambiq Apollox Blue SOC (e.g1	ambiq,spi-bleif
SRAM	on-chip	Generic on-chip SRAM description1	mmio-sram
Timer	on-chip	ARMv7-M System Tick1	arm,armv7m-systick
	on-chip	Ambiq STIMER1	ambiq,stimer
Watchdog	on-chip	Ambiq Watchdog1	ambiq,watchdog

Programming and Debugging

The RAK11720 board shall be connected to a Segger Embedded Debugger Unit J-Link OB. This provides a debug interface to the Apollo3 Blue chip. You can use JLink to communicate with the Apollo3 Blue.

Flashing an application

Connect your device to your host computer using the JLINK USB port. The sample application Hello World is used for this example. Build the Zephyr kernel and application, then flash it to the device:

# From the root of the zephyr repository
west build -b rak11720 samples/hello_world
west flash

Note

west flash requires SEGGER J-Link software and pylink Python module to be installed on you host computer.

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 be able to see on the corresponding Serial Port the following message:

Hello World! rak11720/apollo3_blue