Dual source real time clock synchronization system and method

Details Dual source real time clock synchronization system and method Dual source real time clock synchronization system and method

2008-03-11

2008-03-11

Wachsman, Hal (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S061000, C702S079000, C702S178000, C702S187000, C340S870110

Reexamination Certificate

active

11176937

ABSTRACT:
A dual source real time clock (RTC) synchronization system and method for implementation within automatic meter reading (AMR) systems that provide system-wide device time synchronization. In one embodiment, a microcontroller-implemented RTC counts elapsed seconds from a pre-determined system timestamp using a low-speed, low-accuracy crystal. A second source is used to compensate for the low-speed, low-accuracy crystal. This second source comprises a high speed clock in one embodiment. This dual source RTC system can synchronize the endpoint device.

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