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Swedish embedded specialist Silicon Witchery has launched an extremely compact module designed to deliver Nordic Semi nRF52840 connectivity to probably the most space-constrained of tasks — and, one way or the other, has discovered room to cram a Lattice iCE40 field-programmable gate array (FPGA) on there too.
“Designed for environment friendly AI on the smallest edge units,” Silicon Witchery claims of its mixed microprocessing and FPGA gadget. “The S1 goals to simplify your design and prevent months of RF HDI [radio-frequency high-density interconnect] format. The S1 is a union of 4 key parts which might be important to growing tiny battery-powered merchandise. It targets purposes requiring demanding algorithms whereas consuming as little power as potential.”
Designed for battery-powered tinyML work, the S1 consists of an nRF52 SoC plus an iCE40 FPGA. (📷: Silicon Witchery)
Regardless of its diminutive dimensions of simply 11×6mm (round 0.43×0.24″) the S1 Module, delivered to our consideration by CNX Software program, packs in 4 key blocks: An influence-management built-in circuit (PMIC) with buck-boost converter, low-dropout regulator, and battery charging capabilities; 32Mb of exterior SPI flash for storage; a Nordic nRF52840 system-on-chip with 64MHz Arm Cortex-M4 microprocessor; and a Lattice iCE40 FPGA with 5k LUTs and devoted DSP cores.
Between the microprocessor and FPGA, Silicon Witchery claims, it is potential to run always-on inference duties on the edge whereas drawing as little as 75µA of energy. On the identical time, an built-in antenna offers wi-fi connectivity over Bluetooth 5.2, with Lengthy Vary and Thread help. In complete, the module consists of two general-purpose enter/output (GPIO) pins from the nRF52 with analog-to-digital conversion (ADC) and low-power wake help plus a further eight GPIO pins from the FPGA, together with I2C, I3C, SPI, and USB, alongside three adjustable Vout rails with a single buck-boost as much as 5.5V.
Two growth boards can be found, together with the pictured S1 ECG Package. (📷: Silicon Witchery)
Alongside the tiny module itself Silicon Witchery has launched two growth kits: The S1 Popout Board, which offers breakouts for the module’s IO capabilities and a debugging port for the Cortex microprocessor plus a helpful port for a lithium-polymer battery and a StemmaQT/Qwiic-compatible port for exterior sensor {hardware}; and the S1 ECG Package, which makes use of the module to drive a low-power three-probe electrocardiograph with built-in lithium-polymer battery and an on-board LED bar graph.
Full particulars on the module and growth boards will be discovered on the Silicon Witchery web site, the place the module will be ordered for $30 per unit and the Popout Board and ECG Package for $39 and $45 respectively.
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