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1.发明授权
公开(公告)号：EP1979910B1
公开(公告)日：2011-05-18
申请号：EP07802731.5
申请日：2007-08-20
摘要： The invention relates to a method, particularly in a tachograph (1) for a motor vehicle, for controlling access to a data store (4) which has a first memory area (2) and a second memory area (3) in an electronic circuit (5). To increase data integrity, the invention proposes that the first memory area (2) be provided for storing data which are to be protected with a higher level of security and that the second memory area (3) be provided for storing data which are to be protected with a lower level of security, that a supply voltage be measured and that if the supply voltage is below a prescribed first voltage threshold then access to the first memory area (2) is blocked. The invention also relates to an apparatus, particularly a tachograph (1) for a motor vehicle, for carrying out the aforementioned method with an electronic circuit (5) which has a data store (4).
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2.发明公开
公开(公告)号：EP1979910A1
公开(公告)日：2008-10-15
申请号：EP07802731.5
申请日：2007-08-20
摘要： The invention relates to a method, particularly in a tachograph (1) for a motor vehicle, for controlling access to a data store (4) which has a first memory area (2) and a second memory area (3) in an electronic circuit (5). To increase data integrity, the invention proposes that the first memory area (2) be provided for storing data which are to be protected with a higher level of security and that the second memory area (3) be provided for storing data which are to be protected with a lower level of security, that a supply voltage be measured and that if the supply voltage is below a prescribed first voltage threshold then access to the first memory area (2) is blocked. The invention also relates to an apparatus, particularly a tachograph (1) for a motor vehicle, for carrying out the aforementioned method with an electronic circuit (5) which has a data store (4).
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