Simplicity SDK Platform - Bootloader Version 3.2.0 - Release Notes (Jan 22, 2026)#
Simplicity SDK Platform Version 6.0.0
Simplicity SDK Version 2025.12.0
The Gecko Bootloader is a common bootloader framework used across modern Silicon Labs MCUs and wireless SoCs. It offers configurable features such as device initialization and secure firmware updates.
Release Summary#
Key Features | API Changes | Bug Fixes | Chip Enablement
Key Features#
EM4 GPIO retention during Firmware Upgrade for Series-2 devices.
Added support for the xG2D device family.
API Changes#
None.
Bug Fixes#
Fixed a boot hardfault caused by power loss during the AXiP erase phase.
Chip Enablement#
None.
Key Features#
Gecko Bootloader has been updated to support the latest devices, enabling bootloading functionality on the latest hardware platforms. It now includes the ability to parse GBL version 4 files, ensuring compatibility with the latest firmware formats. Sample applications demonstrating these features are included in the SDK.
New Features | Enhancements | Removed Features | Deprecated Features
New Features#
EM4 GPIO retention during Firmware Upgrade for Series-2 devices.
Added support for the xG2D device family.
Enhancements#
None.
Removed Features#
None.
Deprecated Features#
None.
API Changes#
New APIs | Modified APIs | Removed APIs | Deprecated APIs
New APIs#
New API Signature | Deprecated API replaced by this (if any) |
|---|---|
bootloader_rebootAndInstallWithGpioRetention() | None |
Modified APIs#
None.
Removed APIs#
None.
Deprecated APIs#
None.
Bug Fixes#
| ID | Issue Description | GitHub / Salesforce Reference (if any) | Affected Software Variants, Hardware, Modes, Host Interfaces |
|---|---|---|---|
| 1521516 | Resolved an issue where loss of power during the AXiP erase phase could leave the application region partially erased and incorrectly treated as valid, resulting in a hardfault on boot. The bootloader now detects this state and reliably re-enters firmware-upgrade mode for seamless recovery. | None |
None |
Chip Enablement#
None.
Application Example Changes#
New Examples | Modified Examples | Removed Examples | Deprecated Examples
New Examples#
None.
Modified Examples#
None.
Removed Examples#
None.
Deprecated Examples#
None.
Known Issues and Limitation#
None.