Apollo2 EVB

The Apollo2 EVB is a board by Ambiq featuring their ultra-low power Apollo2 SoC.

Hardware

The Ambiq Apollo2 SoC provides the following hardware features:

ARM® Cortex® M4F core with a Floating Point Unit
Up to 48 MHz operating frequency
16 kB 2-way Associative Cache
Up to 1 MB of flash memory for code/data
Up to 256 KB of low leakage RAM for code/data

For more information about the Apollo2 SoC and a potential Apollo2 EVB board:

Supported Features

The apollo2_evb 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.

`apollo2_evb/apollo2` target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M4F CPU1	`arm,cortex-m4f`
Clock control	on-chip	Generic fixed-rate clock provider2	`fixed-clock`
Debug	on-chip	ARMv7 instrumentation trace macrocell1	`arm,armv7m-itm`
Interrupt controller	on-chip	ARMv7-M NVIC (Nested Vectored Interrupt Controller)1	`arm,v7m-nvic`
MTD	on-chip	Flash node1	`soc-nv-flash`
MTD	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	`fixed-partitions`
Pin control	on-chip	The Ambiq Apollo2 pin controller is responsible for controlling pin function selection and pin properties such as routing UART0 TX to a specific pin and enabling pull-ups1	`ambiq,apollo2-pinctrl`
Serial controller	on-chip	Ambiq UART controller (PL011 compatible)1 1	`ambiq,pl011-uart`
SRAM	on-chip	Generic on-chip SRAM1	`mmio-sram`
Timer	on-chip	ARMv7-M System Tick1	`arm,armv7m-systick`

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 apollo2_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! apollo2_evb