发明授权
- 专利标题: Automatic recovery of integrated circuit cards
- 专利标题(中): 自动恢复集成电路卡
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申请号: US09701915申请日: 2000-12-05
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公开(公告)号: US06536671B1公开(公告)日: 2003-03-25
- 发明人: Michael Baentsch
- 申请人: Michael Baentsch
- 优先权: EP98110424 19980608
- 主分类号: G06K1900
- IPC分类号: G06K1900
摘要:
Integrated circuit cards comprising a microprocessor, volatile memory (RAM), non-volatile memory (ROM, EEPROM), and a power coupling device allowing external power to be supplied to the card. The integrated circuit cards further comprise failure protection device for maintaining power for a short period of time in case of a power supply failure, and a power-failure detector sensing a power supply failure. This power-failure detector triggers the transfer of information from the volatile memory to the non-volatile memory if a power supply failure is sensed. The failure protection device provides power for this transfer. The integrated circuit cards further comprise a device for setting a power supply failure indicator (PF) into the non-volatile memory if a power supply failure is sensed by the power-failure detector, in order to leave a trace that a power supply failure has occurred, where the failure protection device provides the power for setting the indicator (PF).
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