发明公开
EP1337043A2 Failure detection in an analog-digital conversion function of a microcomputer
审中-公开
Erkennung eines Fehlers in der analog-digital Wandlungsfunktion eines Mikrorechners
- 专利标题： Failure detection in an analog-digital conversion function of a microcomputer
- 专利标题（中）： Erkennung eines Fehlers in der analog-digital Wandlungsfunktion eines Mikrorechners
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申请号： EP03002877.3申请日： 2003-02-08
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公开(公告)号： EP1337043A2公开(公告)日： 2003-08-20
- 发明人: Koga, Osamu, c/o NILES PARTS CO., LTD. , Uno, Koji, c/o NILES PARTS CO., LTD. , Kawamura, Yasuharu, c/o NILES PARTS CO., LTD.
- 申请人： Niles Parts Co., Ltd.
- 申请人地址： 5-28-6, Omorinishi, Ota-ku Tokyo 143-0015 JP
- 专利权人： Niles Parts Co., Ltd.
- 当前专利权人： Niles Parts Co., Ltd.
- 当前专利权人地址： 5-28-6, Omorinishi, Ota-ku Tokyo 143-0015 JP
- 代理机构： Luderschmidt, Schüler & Partner
- 优先权： JP2002040713 20020218
- 主分类号： H03M1/10
- IPC分类号： H03M1/10
摘要：
In a microcomputer 10 including an output port 20 for outputting digital signals and an AD conversion register 18 for converting an analog voltage inputted to an AD input port 16 to a digital signal, the output port 20 and the AD input port 16 are directly connected. The output port 20 is allowed to selectively output H of a power source potential and L of a ground potential. The AD conversion register 18 is judged as being failed when any one of predetermined high order bits of the AD conversion register 18 is not 1 at the H output, or when any of one of the predetermined high order bits is not 0 at the L output. The digital conversion value of this AD conversion register 18 is not used. Thereby, existence/absence of failure of the AD conversion register is detected without using 2 channels for the AD input port.
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