发明名称 |
OSCILLATION CIRCUIT, INTEGRATED CIRCUIT, AND ABNORMALITY DETECTION METHOD |
摘要 |
There is provided an oscillation circuit including: a main oscillation circuit that outputs a specific main clock to an internal circuit; a sub oscillation circuit that outputs a sub clock having a different frequency to the frequency of the main oscillation circuit; a first abnormality detection section that detects an abnormality according to a number of main clock cycles output from the main oscillation circuit within a predetermined period corresponding to sub clock outputs from the sub oscillation circuit; and a second abnormality detection section that detects an abnormality according to a frequency divided clock of the main clock output from the main oscillation circuit that has been frequency-divided and the sub clock output from the sub oscillation circuit.
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申请公布号 |
US2013222068(A1) |
申请公布日期 |
2013.08.29 |
申请号 |
US201313772670 |
申请日期 |
2013.02.21 |
申请人 |
LAPIS SEMICONDUCTOR CO., LTD.;LAPIS SEMICONDUCTOR CO., LTD. |
发明人 |
YOSHIMURA KATSUTOSHI;INOUE KAZUTOSHI |
分类号 |
G01R31/317 |
主分类号 |
G01R31/317 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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