SDK Release Notes for SDK 1.3.0
Introduction
The Astra SR MCU from Synaptics is a cutting-edge, high-performance microcontroller designed to bring advanced AI and vision capabilities to a wide range of applications. The Astra SR MCU seamlessly integrates powerful processing, sophisticated vision systems, and exceptional energy efficiency into a compact package.
Harness the power of artificial intelligence with the Astra SR MCU family, featuring scalable multi-core architectures tailored for both AI-enabled and non-AI use cases. AI-capable variants integrate an Arm® Cortex®-M55 CPU running up to 400 MHz alongside an Ethos™-U55 micro NPU, delivering robust performance for real-time inferencing and tiered processing.
The Astra MCU portfolio also includes SL2610-based configurations with a Cortex-M52 (CM52) running up to 200 MHz, designed for high-performance control and signal-processing workloads without AI acceleration.
Across the Astra MCU family, the platform is equipped with a comprehensive set of interfaces to communicate with system components such as the application processor (AP), camera sensors, digital microphones, and other peripherals, enabling flexible integration across a wide range of embedded applications.
The Astra MCU SDK 1.3.0 is a software development kit that supports the SR110 and SL2610 MCUs. It provides a comprehensive collection of source code, tools, and documentation, and is built on CMSIS. The SDK can be compiled using GCC, Arm Compiler 6 (AC6), and LLVM for SR110, while SL2610 supports compilation using GCC only. The high-level components included in this SDK are described below.
Free RTOS
Source codes of various peripheral drivers, image processing, low power sensing blocks.
SR110-specific reference applications demonstrating camera-based sensing and wake-up, person detection, classification, pose detection, segmentation, and hand gesture recognition. It also features JPEG pre-roll with frame transfer over USB CDC to a host PC or via SPI to an SPI-capable receiver, along with audio processing use cases supported on the SR110 platform.
Astra MCU SDK VSCode Extension that supports build and image generation, along with integrated video streaming capabilities.
Related SDK Documents
General
Date |
24th January 2026 |
|---|---|
Version number |
1.3.0 |
Supported SoCs |
SR110 Rev. B (B0) FCCSP & WLCSP SL2610 |
Supported Platforms |
SR110 RDK Board Rev A/B/C/D/E SL2610 RDK Board Rev B/C |
File name |
ASTRA_MCU_SDK1.3.0.7z |
APBL |
SR110: APBL v012F SL2610: 1.3.0 |
SPK |
SR110: SPK RC4.0 |
VS Code |
1.3.1 |
Supported Peripherals
** HW Component** |
CM55-B0 |
CM52 |
|---|---|---|
UART |
√ |
√ |
IOMUX |
√ |
√ |
GPIO |
√ |
√ |
DMA |
√ Memory to Memory |
√ Memory to Memory |
I2C-S/M |
√ |
√ |
Cache |
√ |
√ |
Watchdog |
√ |
√ |
Clocks |
√ |
√ |
Timers |
√ |
√ |
LP-Sense |
√ |
√ |
USB 2.0 Device |
√ |
√ |
SPI-S/M |
√ |
√(SPI-S) |
I2S M |
√ |
√ |
xSPI (1/4 bits) |
√ |
√ |
MIPI CSI RX -0 |
√ |
X |
MIPI CSI RX -1 |
X |
X |
DVP Serial |
√ |
X |
DVP Parallel |
X |
X |
SDIO |
√ |
X |
SPWM |
X |
√ |
Supported Software Components
SW Component |
CM55-B0 |
CM52 |
|---|---|---|
Free RTOS |
√ |
√ |
DMEM Service |
√ |
√ |
Logger Service |
√ |
√ |
USB Tiny USB Stack |
√ |
√ |
Flash Services |
√ |
√ |
Host API Service |
√ |
√ |
Supported Power Modes
Mode |
CM55-B0 |
CM52 |
|---|---|---|
Active |
Full Operational mode: Gear1 (G1), Gear2 (G2), Gear3 (G3) Mode Entry: boot process Mode Exit: N/A |
Active Sleep: TBD |
Hibernation |
All memories: in retention Gear 3: (HP Proc) - disabled Gear 2: (LP Proc) - disabled Gear 1: (LP Sense) – disabled Gear 0 (AON): awake Mode entry: Host API’s power manager commands (0x1-0x4) Mode exit: internal/external event (timer, GPI) |
Deep Sleep partial retention: TBD Deep Sleep Mem retention: TBD Standby: TBD |
VS Code Extension
** SW Tool** |
CM55-B0 |
CM52 |
|---|---|---|
Code Development |
√ |
√ |
Debug |
√ |
X |
Image Generator |
√ |
√ |
Image Flashing |
√ |
√ |
Video Streamer |
√ |
X |
Reference Applications
Use Case |
CM55-B0 w/ Ethos U55 |
CM52 |
|---|---|---|
Vision: Person Detection |
√ |
X |
Vision: Person Classification |
√ |
X |
Vision: Person Pose Detection |
√ |
X |
Vision: Person Segmentation |
√ |
X |
Vision: Hand Gesture Detection |
√ |
X |
Vision: Pre-roll |
√ |
X |
Audio: PDM to I2S |
√ |
X |
Sample Applications
** Example** |
CM55-B0 w/ Ethos U55 |
CM52 |
|---|---|---|
Inference - Single SRAM NN Model |
√ |
X |
Inference - Single Flash NN Model |
√ |
X |
UART Sample Application with flow control |
√ |
X |
I2C Sample Application |
√ |
√ |
PINMUX Sample Application |
√ |
X |
GPIO Sample Application |
√ |
X |
CLK Sample Application |
√ |
X |
SPI Sample Application |
√ |
X |
SDIO Sample Application (SDCARD & SDIO devices) |
√ |
X |
FATFS Sample Application |
√ |
X |
BT Sample Application |
√ |
X |
System Manager |
X |
√ |
DMA Memory to Memory Sample Application |
√ |
√ |
SPWM Application |
X |
√ |
Supported Sensors and Configuration
Sensors supported only with CM55-B0
Sensor |
CSI configuration |
Parallel Configuration |
Serial ** Configuration** |
|---|---|---|---|
OV2C |
|
||
OV5647 |
|
||
K351 |
SDR: Serial Camera 500x500 4FPS |
Supported Flash List
All supported with CM55-B0 and CM52.
Vendor |
Flash Part Number |
|---|---|
Macronix |
MX25U12843G |
GigaDevice |
GD25LE128E |
WINBOND |
W25Q128JW |
Known Issues
Issue |
Summary |
Components |
Severity |
|---|---|---|---|
Revision History
Last Modified |
Revision |
Description |
|---|---|---|
June 2025 |
0.1 |
Astra MCU SDK Release 1.0.0 |
August 2025 |
0.2 |
Astra MCU SDK Release 1.1.0 |
November 2025 |
0.3 |
Astra MCU SDK Release 1.2.0 |
January 2026 |
0.4 |
Astra MCU SDK Release 1.3.0 |
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