Silicon Witchery S1 module combines nRF52811 Bluetooth SoC with Lattice iCE40 FPGA

Sweden-based Silicon Witchery S1 is a tiny module combining Nordic Semi nRF52811 Bluetooth LE SoC with Lattice Semi iCE40 FPGA designed for battery-powered applications leveraging DSP and machine learning (ML) at the edge.

The S1 module features just four key components in a tiny 11.5 x 6 mm form factor and targets applications requiring “demanding” algorithms while consuming as little energy as possible.

Silicon Witchery S1 module with nFR52840 and FPGA

Silicon Witchery S1 module specifications:

  • MCU – Nordic Semi nRF52811 Arm Cortex-M4 MCU @ 64 MHz with Bluetooth 5.2 support including Long Range, Thread support.
  • FPGA – Lattice Semi iCE40 FPGA with 5k LUT and DSP blocks.
  • Storage – 32 Mbit flash storage.
  • Integrated antenna, passives, and crystals.
  • I/Os – 20x castellated holes with
    • 8x FPGA IO include I3C, I2C, SPI, and USB.
    • 2x nRF GPIO pins with ADC and low power wake.
    • SWD pins for debugging
  • Power Supply
    • Lithium battery charging and monitoring.
    • 3x adjustable Vout rails including 1x buck-boost up to 5.5V
  • Dimensions – 11.5 x 6 mm

 

Silicon-Witchery S1 block diagram

The company provides a lightweight SDK based on the Nordic nRF5 SDK, and that relies on tools such as yosys, icestorm & NextPNR, as well as two open-source hardware development kits with the battery-powered S1 Popout board with Stemma/Qwicc QT connector for Adafruit and Sparkfun modules, and the S1 ECG kit with Analog AD8233 front-end designed to research ML-based ECG algorithms.

Use cases include high speed & time-critical DSP, pre-processing data on the edge, power-efficient algorithm design, parallel data processing, real-time AI inferencing, remote machine learning, Bespoke AI algorithm deployment, and Bespoke DSP algorithm deployment.

S1 Popout board & S1 ECG kit

You’ll find documentation and instructions to get started with the module and the two development kits on the documentation website.

The nRF52811 + FPGA S1 module is sold for $30, the S1 Popout board for $39, and the S1 ECG Kit for $45 on Digikey. Additional information may be found on the company’s website.

 

Share this:

Support CNX Software! Donate via PayPal or cryptocurrencies, become a Patron on Patreon, or buy review samples

ROCK Pi 4C Plus
Subscribe
Notify of
guest
The comment form collects your name, email and content to allow us keep track of the comments placed on the website. Please read and accept our website Terms and Privacy Policy to post a comment.
5 Comments
oldest
newest
Marcin Dąbrowski
4 months ago

Using nRF52840 and not using its own built-in USB, relying instead on FPGA? What a wasteful oversight.

Stefan Brüns
4 months ago

As it is an nRF52811 only which does not have USB, this is ok as an option (you don´t have to use it, after all). But putting the differential pair 4 pins apart, with two GPIOs inbetween is just stupid.

joakim bergman
joakim bergman
4 months ago

Datasheet and video say  Nordic nRF52811 !?

Tyler Larson
4 months ago

I’m struggling to come up with a class of use cases for this hardware combination. I’m sure combining a bluetooth SoC plus an FPGA is exactly what SOMEONE is looking for, but I can’t imagine who. What’s the target audience for this product?

Advertisement