Methods and apparatus for data transfer in electronic energy meters
AssigneeAnalog Devices, Inc.
InventorGuljeet S. Gandhi
Life of this patent
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Abstract
An electronic meter, such as an electronic energy meter, includes a sensing circuit for sensing one or more values of a waveform, a memory having a memory bus, a digital signal processor coupled to the memory for calculating at least one parameter value of the waveform in response to the sensed values, and a microcontroller coupled to the memory for performing control functions of the electronic meter. The digital signal processor generates a bus request when access to the memory is required. The microcontroller grants access to the memory in response to the bus request. The sensing circuit may sense and digitize current and voltage values of a polyphase power line.
Claims28
An electronic meter comprising:
- a sensing circuit for sensing one or more values of a waveform;
- a memory having a memory bus;
- a digital signal processor coupled to said memory for calculating at least one parameter value of the waveform in response to the sensed values, said digital signal processor including means for generating a bus request when access to said memory is required;
- and
- a microcontroller coupled to said memory for performing control functions of the electronic meter, said microcontroller comprising means for granting access to said memory in response to said bus request from said digital signal processor.
A method for operating an electronic meter comprising a sensing circuit for sensing one or more values of a waveform, a memory having a memory bus, a digital signal processor coupled to said memory for calculating at least one parameter value of the waveform in response to the sensed values, and a microcontroller coupled to said memory for performing control functions of the electronic meter, said method comprising the steps of:
- said digital signal processor generating a bus request when access to said memory is required;
- and
- said microcontroller granting access to said memory in response to said bus request from said digital signal processor.
An electronic energy meter comprising:
- a sensing circuit for sensing voltage and current values of a polyphase power line;
- a memory having a memory bus;
- a digital signal processor coupled to said memory for calculating parameter values of the polyphase power line in response to the sensed voltage and current values, said digital signal processor comprising means for generating a bus request when access to said memory is required;
- and
- a microcontroller coupled to said memory for performing control functions of the electronic energy meter, said microcontroller comprising means for granting access to said memory in response to said bus request from said digital signal processor.
Dependencies are inferred from the claim text.