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
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Application No.: US10268871Application Date: 2002-10-10
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Publication No.: US07287169B2Publication 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

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.
Public/Granted literature
- US20040073807A1 Electronic device and timer therefor with tamper event time stamp features and related methods Public/Granted day:2004-04-15
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