Microcomputer-equipped system and battery pack for electric power tool
First Claim
1. A microcomputer-equipped system for electric power tool, the system comprising:
- a microcomputer that includes an AD (analog-to-digital) converter and at least one AD port to which an analog signal to be AD converted by the AD converter is inputted;
a reference voltage generator that is separately provided from an operation power source of the microcomputer and generates and inputs to the AD port a reference voltage having a predetermined value;
a reference data storage unit that prestores reference data which is digital data corresponding to the reference voltage;
a first determiner that is provided inside the microcomputer and compares diagnostic data obtained by AD conversion by the AD converter of the reference voltage inputted to the AD port with the reference data stored in the reference data storage unit to determine, in case that difference between the diagnostic data and the reference data is out of a predefined allowable range, that an AD abnormal state has occurred in which a correct result of the AD conversion is unable to be obtained from the AD converter.
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Abstract
A microcomputer-equipped system for electric power tool includes a microcomputer, a reference voltage generator, a reference data storage unit, and a first determiner. The microcomputer includes an analog-to-digital (AD) converter and at least one AD port. The reference voltage generator generates and inputs to the AD port a reference voltage having a predetermined value. The reference data storage unit prestores reference data corresponding to the reference voltage. The first determiner compares diagnostic data obtained by AD conversion by the AD converter of the reference voltage inputted to the AD port with the reference data to determine, in case that difference between the diagnostic data and the reference data is out of a predefined allowable range, that an AD abnormal state has occurred in which a correct result of the AD conversion is unable to be obtained from the AD converter.
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Citations
17 Claims
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1. A microcomputer-equipped system for electric power tool, the system comprising:
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a microcomputer that includes an AD (analog-to-digital) converter and at least one AD port to which an analog signal to be AD converted by the AD converter is inputted; a reference voltage generator that is separately provided from an operation power source of the microcomputer and generates and inputs to the AD port a reference voltage having a predetermined value; a reference data storage unit that prestores reference data which is digital data corresponding to the reference voltage; a first determiner that is provided inside the microcomputer and compares diagnostic data obtained by AD conversion by the AD converter of the reference voltage inputted to the AD port with the reference data stored in the reference data storage unit to determine, in case that difference between the diagnostic data and the reference data is out of a predefined allowable range, that an AD abnormal state has occurred in which a correct result of the AD conversion is unable to be obtained from the AD converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification