Application processors for wearable products includes accelerometer

April 02, 2014 // By Graham Prophet
Toshiba Electronics’ application processor designed for wearable devices such as activity monitors, smart watches, bracelet- and glasses-type devices, the TZ1001MBG, integrates sensing, data processing and wireless transmission into a single package.

TZ1001MBG features an accelerometer to measure motion, a processor to handle the data acquired by the sensor, 8 Mbit flash memory to store data, as well as RF circuitry and a Bluetooth Low Energy controller that supports low power communication.

A 48 MHz ARM Cortex-M4F with DSP and floating point processing unit allows combination of data from multiple sensors, both internal and external, to improve sensor accuracy (sensor fusion).

The IC has high-resolution ADCs that can convert analogue signals from external sensors, such as pulse wave and electrocardiogram (ECG) devices. Transfer of raw and processed data to external equipment, such as smartphones and tablets is supported through a range of I/O protocols; USB, SPI, I 2C, UART, 12-bit ADC, 24-bit Delta-Sigma ADC.

The TZ1001MBG application processor also offers an original low power-consumption design, enabling use in wearable devices that require long battery runtimes. Sample shipments will start in May, with mass production scheduled to start in September 2014.

Toshiba is also expanding the line-up of its TZ1000 series by developing TZ1011MBG, which adds a gyroscope and a magnetometer to the package described above.