Invention Grant
US07287169B2 Electronic device and timer therefor with tamper event stamp features and related methods 有权
电子设备和定时器,具有篡改事件时间戳功能和相关方法

  • Patent Title: Electronic device and timer therefor with tamper event stamp features and related methods
  • Patent Title (中): 电子设备和定时器,具有篡改事件时间戳功能和相关方法
  • Application No.: US10268871
    Application Date: 2002-10-10
  • Publication No.: US07287169B2
    Publication Date: 2007-10-23
  • Inventor: Tom Youssef
  • Applicant: Tom Youssef
  • Applicant Address: US TX Carrollton
  • Assignee: STMicroelectronics, Inc.
  • Current Assignee: STMicroelectronics, Inc.
  • Current Assignee Address: US TX Carrollton
  • Agent Lisa K. Jorgenson; Christopher F. Regan
  • Main IPC: G06F11/30
  • IPC: G06F11/30
Electronic device and timer therefor with tamper event stamp features and related methods
Abstract:
An electronic timer may include a clock reference signal generator and a real time clock (RTC) circuit for generating real time data based upon the clock reference signal. The RTC circuit may include a plurality of registers each for storing a respective bit of the real time data. Further, each register may include a master latch for initially storing the real time data bit, a slave latch for subsequently storing the real time data bit, and a user latch for storing the real time data bit from the slave latch. The RTC circuit may further include a controller for causing at least some of the registers to increment based upon the clock reference signal. Additionally, the electronic timer may also advantageously include a tamper circuit for receiving a tamper event signal and causing each of the user latches to hold a time stamp therein.
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