Ambiq Apollo4 Blue Plus KXR EVB

Apollo4 Blue Plus KXR EVB is a board by Ambiq featuring their ultra-low power Apollo4 Blue Plus SoC.

Apollo4 Blue Plus KXR EVB

Hardware

  • Apollo4 Blue Plus SoC with upto 192 MHz operating frequency

  • ARM® Cortex® M4F core

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

  • Up to 2 MB of non-volatile memory (NVM) for code/data

  • Up to 2.75 MB of low leakage / low power RAM for code/data

  • 384 kB Tightly Coupled RAM

  • 384 kB Extended RAM

  • Bluetooth 5.1 Low Energy

For more information about the Apollo4 Blue Plus SoC and Apollo4 Blue Plus KXR EVB board:

Supported Features

The Apollo4 Blue Plus KXR EVB board configuration supports the following hardware features:

Interface

Controller

Driver/Component

MPU

on-chip

memory protection unit

NVIC

on-chip

nested vector interrupt controller

SYSTICK

on-chip

systick

STIMER

on-chip

stimer

GPIO

on-chip

gpio

UART

on-chip

serial

WDT

on-chip

watchdog

SPI(M)

on-chip

spi

I2C(M)

on-chip

i2c

CLOCK

on-chip

clock_control

RADIO

on-chip

bluetooth

The default configuration can be found in boards/ambiq/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb_defconfig

Programming and Debugging

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 apollo4p_blue_kxr_evb 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! apollo4p_blue_kxr_evb