DATA PROTECTION CIRCUIT, DATA PROTECTION METHOD, AND DATA PROCESSING APPARATUS
First Claim
1. A data protection circuit to which first input data and a first error detecting code are input, the data protection circuit outputting first output data corresponding to the first input data and a second error detecting code, the data protection circuit comprising:
- a first path that outputs the first input data as the first output data;
a first generation unit that acquires the first input data from the first path and generates the second error detecting code; and
a first check unit that acquires the first input data from a position on the first path that is closer to an output side than an acquiring position in the first generation unit and checks the first input data using the first error detecting code.
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Accused Products
Abstract
A generation unit in a data protection circuit acquires input data from one position on a path that outputs the input data as output data, and generates a second error detecting code. A check unit acquires the input data from another position on the path that is closer to an output side than the acquiring position in the generation unit, and checks the input data using a first error detecting code. Further, a connection unit connects the acquiring position in the generation unit and the acquiring position in the check unit so that the input data is acquired by the check unit subsequent to acquirement by the generation unit.
14 Citations
12 Claims
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1. A data protection circuit to which first input data and a first error detecting code are input, the data protection circuit outputting first output data corresponding to the first input data and a second error detecting code, the data protection circuit comprising:
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a first path that outputs the first input data as the first output data; a first generation unit that acquires the first input data from the first path and generates the second error detecting code; and a first check unit that acquires the first input data from a position on the first path that is closer to an output side than an acquiring position in the first generation unit and checks the first input data using the first error detecting code. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A data processing apparatus comprising:
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first and second processing circuits, each of which processing data; and a protection circuit to which data and a first error detecting code are input from the first processing circuit, the protection circuit outputting the data and a second error detecting code to the second processing circuit, wherein the protection circuit generates the second error detecting code corresponding to the data, and thereafter checks the data using the first error detecting code.
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9. A data protection method comprising:
generating a first error detecting code corresponding to data that is input, and then checking the data using a second error detecting code input according to the data. - View Dependent Claims (10, 11, 12)
Specification