The Wearable Development Kit (WDK1.0) is a response to ON’s perception of a missing piece of the wearables product creation process, “Despite the growing interest in wearable electronics, to date there is simply not a solution on the market that provides the scope needed by OEMs to help them develop feature rich designs that will attract strong consumer uptake,” states AJ ElJallad, senior manager, corporate strategy and business development at ON Semiconductor. “The WDK1.0 is a multi-faceted design asset that will allow wearable technology projects to be expedited.”
A programmable NCP6915 Power Management IC provides five LDOs and ]one DC-DC to support power requirement for the smartwatch and for additional development requirements. An NCP1855 battery charger IC, plus an LC709203F fuel gauge and a 10W rated SCY1751 wireless charging front-end controller (supporting AirFuel compatible magnetic resonance charging) have also been incorporated. The kit’s sensor capabilities stem from the MEMS-based FIS1100 inertial measurement unit (IMU), with 3‐axis gyroscope and 3‐axis accelerometer operation enabling accurate multi-dimensional motion tracking. There is also an embedded temperature sensor included and an LC898301 driver IC for initiating haptic feedback.
Wireless connectivityis via an nRF52832 multi-protocol system-on-chip (SoC) from Nordic Semiconductor. This has a 32-bit ARM Cortex processor core and a 2.4 GHz transceiver - offering support for Bluetooth Low Energy (BLE) and other wireless technologies. The kit is complemented by a SmartApp which can be downloaded directly from Android PlayStore and Apple AppStore. Using this, various pieces of information can be derived, such as the steps taken, calories burnt, distance covered and activity period, as well as human machine interface aspects such as screen brightness adjustment, clock face control, alarm settings and establishing fitness goals. An Eclipse-based IDE accompanies the kit. This presents engineering teams with all the resources they need to rapidly create and subsequently debug code necessary for designs. A highly intuitive Project Wizard further facilitates the development process, by giving engineers