Nordic Semiconductor Asa

Martin Tverdal

Joel David Stapleton

Joel Stapleton

A method of calibrating a first oscillator () is disclosed. A temperature is measured to obtain a measured temperature value and a determination is made of whether said measured temperature value differs from at least one previously measured temperature value by more than a threshold amount. If said measured temperature does differ from at least one previously measured temperature by more than said threshold amount, a reference oscillator () is used to calibrate the first oscillator ().

Low-power oscillator

An integrated-circuit radio communication device () comprises processing means (), memory (), and radio communication logic (). The memory () stores (i) a boot-loader (), (ii) a firmware module () in a firmware memory region, and (iii) a software application () in a software-application memory region. The firmware module () comprises instructions for controlling the radio communication logic () according to a predetermined radio protocol, and the software application () comprises instructions for invoking a radio-communication function of the firmware module (). The boot-loader () or the firmware module () comprises instructions for using the radio communication logic () to receive a new firmware module (), and the boot-loader () or the firmware module () comprises instructions for storing the new firmware module () in the software-application memory region such that at least a portion of the software application () is overwritten by the new firmware module (). The boot-loader () comprises instructions for moving or copying the new firmware module () from the software-application memory region to the firmware memory region.

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Trondheim, Norway

Martin Tverdal