Battery-free ultra-low power RISC-V microcontroller is launched
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This post was last edited by dcexpert on 2020-1-2 21:51
Source: https://www.cnbeta.com/articles/tech/927965.htm
“Battery-based solutions come with the inevitable battery replacement issue, which translates into incremental cost for the entire device. ONiO.zero avoids this pain point and reduces the cost of ownership. It can provide power to sensors and devices for many years. ONiO.zero is self-powered and supports a variety of power sources, from multi-band RF bands supporting GSM and ISM to optional external power sources such as solar, piezoelectric, thermal, and dry cell batteries.
The microcontroller itself is based on the free and open source RISC-V instruction set architecture - RV32EMC, and it runs at up to 24MHz when powered by 1.8V.
The controller can also run at lower voltages when needed: 1V at 6MHz, 0.8V at 1MHz, and down to 450mV, and the chip will continue to operate. The controller contains 1kB of ROM down to 450mV and 2kB of RAM, as well as 8-32kB of ultra-low power flash memory with 100,000 erase and write cycles and a read voltage as low as 850mV.
ONiO.zero also includes a crystal-less Bluetooth Low Energy (BLE) transmitter capable of operating at voltages as low as 850mV, an IEEE 802.15.4 Ultra-Wideband (UWB) transmitter operating in the 3.5-10GHz band, and an optional 433MHz MICS radio transmitter for the Industrial, Scientific and Medical (ISM) band.
The compact chip can run at frequencies up to 24MHz, depending on available power
The chip's energy comes from an internal RF rectifier that harvests energy from the 800/900/1800 and 1900/2400MHz bands (ISM and GSM). For environments where there is not enough RF energy to reliably power the chip, an "internal power plant" supports photovoltaic cells down to 400mV, and piezoelectric or thermal power sources from 1.8V to 3.6V.
No batteries means fewer components and smaller designs that can be easily integrated into a wide range of solutions - whether it's fabrics, jewelry, watches, wearable medical devices, livestock or building sensors. What's more, it's a cleaner, greener solution.
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