FPGAs deliver precise time keeping in satellite watches

Citizen Watch are integrating Lattice Semiconductor’s iCE40 FPGAs into it’s Eco-Drive Satellite Wave F100 wristwatch. To enable the watch to display the correct time, the FPGA picks up the precise-time information from the input data of the GPS satellite signal receiver and generates control signals.

The watch displays the correct time anywhere in the world’s 40 time zones through receiving and processing satellite signals in real-time.

“The iCE40 FPGA was a prerequisite for us to complete our new system design,” said the Head of System Development, Watch Department, Citizen Watch. “Lattice’s solution provided the smallest form factor for processing data received from GPS satellites and computing precise time, faster than any processor for running our custom algorithms and without the need to develop an ASIC.”

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