Integrated circuit device with tamper detection input and having real time clock calendar logging thereof

Patent metadata

Field	Value
Publication number	US-9602895-B2
Application number	US-201414538253-A
Country	US
Kind code	B2
Filing date	Nov 11, 2014
Priority date	Nov 14, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

If an enclosure of a metering device is opened or vandalized, application software must determine when the metering history information became unreliable, and further notification to the utility may be desirable. Likewise, a shipping container or suitcase that has been opened or mishandled during shipping transient may be attributed to a particular location and/or handling person(s) when the time and date of the mishandling occurrence are known. A transition on a special device input from a tamper or mishandling sensor captures real-time clock/calendar (RTCC) information that provides to a software application the time and date of the detected tampering or mishandling event. This transition may also cause memory storage of the RTCC information related to the event. Thus, an integrated circuit device, for example a microcontroller or any other integrated circuit device may comprise such an RTCC and external input, and, optionally, memory storage of the RTCC event occurrence.

First claim

What is claimed is:

1. An integrated circuit device, comprising:
a real time clock and calendar (RTCC) circuit configured to be coupled with an external power source;
a time stamp capture register coupled with the RTCC; and
an external input coupled with the time stamp capture register for receiving an event signal that initiates capture of time and date information provided by the RTCC into the time stamp capture register; wherein:
the time stamp capture register is a plurality of time stamp capture registers; and
the device further comprises a plurality of false trigger filters, wherein each of the plurality of false trigger filters is coupled to a respective one of the plurality of time stamp capture registers.

2. The integrated circuit device according to claim 1 , wherein the time stamp capture register is non-volatile.

3. The integrated circuit device according to claim 1 , wherein the time stamp capture register has secured access thereto.

4. The integrated circuit device according to claim 1 , further comprising a false trigger filter coupled between the external input and the time stamp capture register.

5. The integrated circuit device according to claim 4 , wherein the false trigger filter comprises a low pass filter.

6. The integrated circuit device according to claim 4 , wherein the false trigger filter comprises a digital sampling and averaging filter.

7. The integrated circuit device according to claim 1 , wherein the RTCC, the time stamp capture register, the external input, and the false trigger filter are powered by a continuous power source.

8. The integrated circuit device according to claim 7 , wherein the continuous power source is a battery.

9. The integrated circuit device according to claim 1 , further comprising an application circuit and a communications interface coupled with the RTCC and the time stamp capture register.

10. The integrated circuit device according to claim 9 , wherein the RTCC, time stamp capture register, and application circuit are provided by a microcontroller.

11. The integrated circuit device according to claim 1 , wherein the event signal is a tamper signal from a tamper sensor.

12. The integrated circuit device according to claim 11 , wherein the tamper sensor is selected from the group consisting of a pressure activated switch, a magnetically activated switch, a mechanically activated switch, a Hall Effect magnetic sensor, a pressure transducer, and a capacitive proximity sensor.

13. The integrated circuit device according to claim 1 , wherein the event signal is a mishandling signal from a mishandling sensor.

14. The integrated circuit device according to claim 13 , wherein the mishandling sensor is selected from the group consisting of an acceleration sensor, a vibration sensor, a tilt sensor, a temperature sensor, a moisture sensor, a pressure sensor, a humidity sensor, an ultraviolet sensor, an infrared sensor, a radiation sensor, and an altitude sensor.

15. A metering device having tamper detection, comprising:
a meter housing;
a process metering sensor in the meter housing;
a tamper sensor for detecting tampering of the meter housing; and
an integrated circuit device in the meter housing and comprising a real time clock and calendar (RTCC) circuit configured to be coupled with an external power source;
a time stamp capture register coupled with the RTCC,
an external input coupled with the time stamp capture register for receiving a signal from the tamper sensor that initiates capture of time and date information provided by the RTCC into the time stamp capture register, and
an application circuit coupled to the process metering sensor and the time stamp capture register; wherein:
the time stamp capture register is a plurality of time stamp capture registers; and
the integrated circuit device further comprises a plurality of false trigger filters, wherein each of the plurality of false trigger filters is coupled to a respective one of the plurality of time stamp capture registers.

16. The metering device according to claim 15 , wherein the metering device is a utility meter.

17. The metering device according to claim 16 , wherein the utility meter is selected from the group consisting of an electric power meter, a natural gas meter, a propane meter, and a water meter.

18. A shipping container having mishandling detection, comprising:
a storage housing;
a mishandling sensor for detecting mishandling of the storage housing; and
an integrated circuit device in the storage housing and comprising
a real time clock and calendar (RTCC) circuit configured to be coupled with an external power source;
a time stamp capture register coupled with the RTCC, and
an external input coupled with the time stamp capture register for receiving a signal from the mishandling sensor that initiates capture of time and date information provided by the RTCC into the time stamp capture register; wherein:
the time stamp capture register is a plurality of time stamp capture registers; and
the integrated circuit device further comprises a plurality of false trigger filters, wherein each of the plurality of false trigger filters is coupled to a respective one of the plurality of time stamp capture registers.

19. The shipping container according to claim 18 , wherein the mishandling sensor is selected from the group consisting of an acceleration sensor, a vibration sensor, a tilt sensor, a temperature sensor, a moisture sensor, a pressure sensor, a humidity sensor, an ultraviolet sensor, an infrared sensor, and an altitude sensor.

20. The shipping container according to claim 18 , wherein the storage housing is an intermodal steel container.

21. The shipping container according to claim 18 , wherein the storage housing is a shipping box.

22. The shipping container according to claim 18 , wherein the storage housing is a suitcase.

23. An electronic device having non-volatile memory that is erased when unauthorized access of the electronic device is detected, comprising:
a digital processor;
a non-volatile memory coupled with the digital processor;
a tamper sensor;
a real time clock and calendar (RTCC) circuit configured to be coupled with an external power source;
a time stamp capture register coupled with the RTCC and having an input coupled to the tamper sensor, wherein when a tamper signal is received from the tamper sensor the time stamp capture register stores time and date information provided by the RTCC; and
the tamper signal also initiates the digital processor to erase data from the non-volatile memory; wherein:
the time stamp capture register is a plurality of time stamp capture registers; and
the device further comprises a plurality of false trigger filters, wherein each of the plurality of false trigger filters is coupled to a respective one of the plurality of time stamp capture registers.

24. The electronic device according to claim 23 , wherein the non-volatile memory is a hard disk.

25. The electronic device according to claim 23 , wherein the electronic device is selected from the group consisting of a personal computer, a tablet computer, a smart phone, and a bank ATM.

Assignees

• Microchip Tech Inc

Inventors

• Bowling Stephen
• Simmons Michael

Classifications

• H04Q9/00 Primary

  Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom · CPC title

• G01R22/066 Primary

  Arrangements for avoiding or indicating fraudulent use · CPC title

• G08B13/00

  Burglar, theft or intruder alarms · CPC title

• G01R11/24

  Arrangements for avoiding or indicating fraudulent use · CPC title

• B65D25/00

  Details of other kinds or types of rigid or semi-rigid containers · CPC title