Ultra low-power wearables offer extended battery life of up to 30 hours

19-02-2015 | Epson Imaging Devices | Design Applications

Cadence Design Systems has announced that Epson has switched from its
previous GPS subsystem to one using the Cadence Tensilica Xtensa processor
to extend the battery life of its wrist watch GPS running monitors from 14
hours to up to 30 hours when the GPS function is activated.

Epson took advantage of the highly flexible Xtensa processor architecture to
optimize the design for the best power, performance and area results, which
greatly contributed to the overall subsystem power savings, says the

"Ultra low-power features are critical for chip designs in our wearables
segment," said Kenichi Ushiyama, general manager, Epson. "By adapting the
Cadence Tensilica Xtensa processor to our needs, we were able to combine the
control and GPS signal processing functions into one efficient core, saving
power and area for this very space-constrained design."

The Xtensa processor can be customized to handle both performance-intensive
digital signal processing (DSP) and embedded control processing functions.
The patented automated Xtensa Processor Generator allows designers to create
more competitive and differentiated features with the lowest power by
integrating control and signal processing in a single core.

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