JPS6486287A - Method for supervising battery life of ic memory card - Google Patents
Method for supervising battery life of ic memory cardInfo
- Publication number
- JPS6486287A JPS6486287A JP62244479A JP24447987A JPS6486287A JP S6486287 A JPS6486287 A JP S6486287A JP 62244479 A JP62244479 A JP 62244479A JP 24447987 A JP24447987 A JP 24447987A JP S6486287 A JPS6486287 A JP S6486287A
- Authority
- JP
- Japan
- Prior art keywords
- time
- battery
- supervising
- card
- life
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To inform a user of the exchange time of a battery by storing battery life time data to an IC card and supervising a life time every time the card is connected to a card reader/writer. CONSTITUTION:When an IC memory card 32 is connected to a card reader/ writer 10, whether the life time data of a battery 44 is stored to registers 36, 38 and 40 or not is decided. When the time data are stored, the contents of the respective registers are read. A using start time TS and a life time TB are read from the register 36. A back-up unnecessary time TU is fetched from the register 38. Next, a present time TR is fetched from a present time timer 18 and the operation of TR-TS-TU is executed. The operated time and a time, which subtracts the period of grace alpha from the life time TB of the battery, are compared and the usable time of the battery is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244479A JPS6486287A (en) | 1987-09-29 | 1987-09-29 | Method for supervising battery life of ic memory card |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244479A JPS6486287A (en) | 1987-09-29 | 1987-09-29 | Method for supervising battery life of ic memory card |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6486287A true JPS6486287A (en) | 1989-03-30 |
Family
ID=17119277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62244479A Pending JPS6486287A (en) | 1987-09-29 | 1987-09-29 | Method for supervising battery life of ic memory card |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6486287A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4839208A (en) * | 1986-04-30 | 1989-06-13 | Nec Corporation | Optical information recording medium |
JPH04119490A (en) * | 1990-09-10 | 1992-04-20 | Matsushita Graphic Commun Syst Inc | Ic card and ic card driving device using the card |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6188653A (en) * | 1984-10-05 | 1986-05-06 | Fujitsu Ltd | Detecting method of battery lifetime |
JPS61188612A (en) * | 1985-02-18 | 1986-08-22 | Sanyo Electric Co Ltd | Memory backup supervising system |
-
1987
- 1987-09-29 JP JP62244479A patent/JPS6486287A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6188653A (en) * | 1984-10-05 | 1986-05-06 | Fujitsu Ltd | Detecting method of battery lifetime |
JPS61188612A (en) * | 1985-02-18 | 1986-08-22 | Sanyo Electric Co Ltd | Memory backup supervising system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4839208A (en) * | 1986-04-30 | 1989-06-13 | Nec Corporation | Optical information recording medium |
JPH04119490A (en) * | 1990-09-10 | 1992-04-20 | Matsushita Graphic Commun Syst Inc | Ic card and ic card driving device using the card |
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