ARM mbed Smartwatch reference design with 2 months battery life

Posted by Charbax – November 28, 2015

ARM shows their open source hardware and software Smartwatch reference design with 2 months battery life runs mbed OS on a Silicon Labs EFM32 Giant Gecko ARM Cortex-M3 SoC and memory LCD, it also have an ARM Cortex-M0 for Bluetooth and an ARM Cortex-M4 for the fingerprint sensor. GPS, NFC, 9-axis sensor (accelerometer, gyroscope and magnetometer), ambient light sensor, capacitive sliders for UI scrolling, buttons and more are on the flexible PCB. The power consumption is around 70microAmps with the animation running on the memory LCD, the battery life should be about 2 month on a compact and light 160mAh battery. ARM is building open source experimental smart wearables to explore the potential of ARM in wearables and IoT, to encourage device makers to use all the latest ARM technologies in combination with innovative display technologies and sensors to to create better concepts, to better use technologies to try to contribute to and improve the internet of things and the wearables market. Some goals for better Wearables can be to last months on a battery, to connect and interact with all devices seamlessly, to enable new forms of trusted interactions and ultimately aim to fade in to the background. These advances are to be integrated into ARM's open source mbed OS, there might be subsets of mbed OS, less is needed on the Bluetooth chip for example than on the microcontroller of the Smartwatch or other IoT device.

Developing this mbed OS Smartwatch reference design gives ARM the opportunity to get first-hand experience of the realities of building complete and complex physical products - the mechanical design, electronics, software and taking it all through the production process. ARM has taken a complete design from concept through to manufacturing a few hundred working units thus far, and learned a huge amount. This may inspire and encourage device makers to advance and innovate faster to make the Smartwatch market a success.