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    • 7. 发明专利
    • DATA PROCESSOR
    • JPH02130638A
    • 1990-05-18
    • JP28488988
    • 1988-11-11
    • HITACHI LTD
    • TAKEUCHI YUSUKEMIKI SAKAE
    • G06F11/22
    • PURPOSE:To exactly execute the analysis of defect and self-diagnosis in a short time by providing a timing generating circuit to stop the generation of a next timing signal when the generation of all the timing signals is finished. CONSTITUTION:In a microprocessor, a timing generator is provided to stop the generation of the next timing signal when a mode switching signal is inputted from an external part and the generation of all the timing signals in one machine cycle is finished. By such a means, the operation in the internal part of the microprocessor can be stopped for the unit of the machine cycle and data in a register group 3 or a RAM 4 can be held at such a time point. Then, an address is supplied from the external part or the arbitrary data are inputted from the external part to the desired register or RAM and processing can be continued by using the data. Accordingly, in a data processor such as the microprocessor to be operated according to a program, the analysis of the defect or the self-diagnosis can be exactly executed in a short time.
    • 10. 发明专利
    • LSI FOR COMMUNICATION AND COMMUNICATION CONTROLLER
    • JPH1132033A
    • 1999-02-02
    • JP18669297
    • 1997-07-11
    • HITACHI LTD
    • MORITA YOSHINOBUTAKEUCHI YUSUKE
    • H04J3/06H04L7/08H04Q11/04
    • PROBLEM TO BE SOLVED: To reduce frame errors by providing a masking processing means for masking the frame part of input data, based on masking data set beforehand corresponding to a frame pattern in the preceding stage of a pattern detection means for detecting the frame pattern. SOLUTION: A frame detection circuit 30 performs forcible '0' discrimination on equalization data from a digital signal processing circuit based on masking information corresponding to the frame pattern and outputs the identification data. In a pattern detection circuit 32, whether or not output data from a memory 31 which stores the identification data match with a prescribed frame pattern is discriminated. Matching signals OK are asserted when the frame pattern matches, and non-matching signals NG are asserted when it does not match. In a synchronization protection circuit 35, the matching signals OK and the non-matching signals NG are respectively counter, and frame deviation signals are asserted at the point of time at which the non-matching signals NG exceed a prescribed value.