v4.3.0-ambiq.v1.0.1 is a maintenance release of the Ambiq Zephyr distribution. It documents validated Bluetooth support across the Apollo3, Apollo4 and Apollo5 EVBs, points the Ambiq HAL at its public repository, and adds Apollo2 UART power management. The release is based on upstream Zephyr v4.3.0.
See the release notes for the full detail, organised by chipset family: Apollo510L/330P, Apollo510/510B, Apollo4x, Apollo3x and Apollo2.
Initialise a workspace from the ambiq-stable branch:
west init -m https://github.com/AmbiqMicro/ambiqzephyr --mr ambiq-stable
west updateThe previous line is frozen at tag ambiq-stable-pre-v1.0.0 and remains
available at branch frozen/ambiq-stable-pre-v1.0.0-2026-07. It receives no
further updates.
- Bluetooth Classic is not yet supported on Apollo510 Lite or Apollo330 Plus.
Ambiq is an Austin-based semiconductor company with a mission to enable intelligence (artificial intelligence (AI) and beyond) everywhere by delivering the lowest power semiconductor solutions. Built on its patented Subthreshold Power Optimized Technology (SPOT®) and the HELIA™ AI platform, Ambiq empowers manufacturers to bring more capable AI to the edge, where power, memory, and energy efficiency are most critical.
Built for intelligent, always-on edge devices across healthcare, wearables, industrial automation, smart environments, and other emerging AI applications, Ambiq continues to shape the future of always-on Edge AI globally. For more information, visit www.ambiq.com.
The Zephyr Project is a scalable, real-time operating system supporting multiple hardware architectures, optimized for resource constrained devices and built with security in mind. It is an open source project hosted by the Linux Foundation, developed in the open by a broad community of vendors and individual contributors.
Zephyr provides a small-footprint kernel, a unified device driver model, a
devicetree-based hardware description, a configurable network and connectivity
stack, and a common build and test tooling (west and twister) shared
across every supported platform.
This repository is Ambiq's distribution of Zephyr. It tracks the upstream Zephyr Project and adds the SoC support, drivers, boards, samples, and documentation for Ambiq Apollo devices.
- Release branch:
ambiq-stableis the manufacturing and customer release line. The release number lives in theVERSIONfile at the repository root and is what the boot banner reports. - Everything else — supported peripherals, boards, build and flash commands, power management guidance — is documented under doc/ambiq/.
git checkout ambiq-stableNew to Zephyr? Start with the Introduction to Zephyr for a high-level
overview, then follow the Getting Started Guide to install the dependencies
and set up a west workspace.
Once the workspace is in place, continue with the Ambiq documentation below for toolchain versions, board support, and build commands.
🧭 Ambiq Documentation Index — start here🧩 Supported Features — drivers, power management, third-party libraries📡 Bluetooth — validated support per board
For Apollo SoC datasheets, errata, and the AmbiqSuite SDK, see the Ambiq Content Portal and Ambiq Products.
Community support is provided via mailing lists and Discord; see the Resources below for details.
Here's a quick summary of resources to help you find your way around:
💬 Discord Server for real-time community discussions
⚠️ Report security vulnerabilities at vulnerabilities@zephyrproject.org