NetTimeLogic provides two different DCF cores: a DCF Slave core for synchronizing to a DCF77 sender. DCF77 is a German longwave time signal and standard-frequency radio station. It receives the time from the DCF77 sender near Frankfurt, Germany or any other DCF compatible source. This allows around 10 millisecond accuracy over a wireless interface.
A DCF Master core which allows to synchronize DCF Slaves via a wire using a PWM DCLS encoded signal in the format of DCF77.
All cores are in plain VHDL and completely FPGA vendor independent. The DCF decoding and processing is implemented as full hardware core, no soft-core CPUs are used.
The DCF Master from NetTimeLogic is a full hardware only implementation of an DCF Master to distribute time via DCF over a wire.
The DCF Slave from NetTimeLogic is a full hardware only implementation of a DCF synchronizer. It allows to synchronize the local clock to a DCF77 sender without the need of software or a soft-core CPU.