JPS6457390A - Ic card reader - Google Patents
Ic card readerInfo
- Publication number
- JPS6457390A JPS6457390A JP62212846A JP21284687A JPS6457390A JP S6457390 A JPS6457390 A JP S6457390A JP 62212846 A JP62212846 A JP 62212846A JP 21284687 A JP21284687 A JP 21284687A JP S6457390 A JPS6457390 A JP S6457390A
- Authority
- JP
- Japan
- Prior art keywords
- card reader
- time
- reset
- goes
- timer
- 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 suppress the stalling state of an IC card reader control part even when the control part goes to the stalling state due to external noise or the like by controlling an interface between a master device and an IC card reader by a reset system. CONSTITUTION:A specific command is continuously sent from the IC card reader side to a host device at about 100ms period through a serial interface 23. At the time of receiving the specific command, the host device side sets its built-in timer for a sufficiently longer time as compared with 100ms. The timer is reset every recognition of the specific command. When the IC card side goes to the stalling state due to external noise or the like, the timer goes to time-out. At the time of detecting the stalling state, a reset mechanism 25 on the IC card side is started. At that time, a reset signal is generated, an IC card reader control circuit 22 is reset and the card reader goes to an operable state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62212846A JPS6457390A (en) | 1987-08-28 | 1987-08-28 | Ic card reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62212846A JPS6457390A (en) | 1987-08-28 | 1987-08-28 | Ic card reader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6457390A true JPS6457390A (en) | 1989-03-03 |
Family
ID=16629300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62212846A Pending JPS6457390A (en) | 1987-08-28 | 1987-08-28 | Ic card reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6457390A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0479461A (en) * | 1990-07-19 | 1992-03-12 | Fujitsu Ltd | Floppy change system of video conference system |
US5434397A (en) * | 1989-11-03 | 1995-07-18 | Laboratoire Europeen De Recherches Electroniques Avancees, Societe En Nom Collectif | Protection against the non-authorized inhibition of writing in certain storage areas of a smart card |
-
1987
- 1987-08-28 JP JP62212846A patent/JPS6457390A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5434397A (en) * | 1989-11-03 | 1995-07-18 | Laboratoire Europeen De Recherches Electroniques Avancees, Societe En Nom Collectif | Protection against the non-authorized inhibition of writing in certain storage areas of a smart card |
JPH0479461A (en) * | 1990-07-19 | 1992-03-12 | Fujitsu Ltd | Floppy change system of video conference system |
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