JPH0850641A - Ic card - Google Patents

Abstract

PURPOSE:To provide an IC card with a CPU capable of interrupting the processing of the IC card and restarting the processing from the middle of the processing by providing the preservation function of the execution state of the IC card and the recovery function of the execution state. CONSTITUTION:This card is provided with a state preservation means 101 for preserving information for which initial setting is required at the time of performing the restart after stopping the supply of a power source and starting the processing by reset signals such as the states or the like of at least a register, a volatile memory and an IO port in a nonvolatile recording part such as an EEPROM or the like, a state setting means 102 for setting the states of parts where state setting is required such as the register, the volatile memory and the IO port, etc., by the information preserved in the nonvolatile recording part, a preservation state setting means 103 for setting the information for indicating whether or not the state of the IC card is preserved and a set state judgement means 104 for reading and judging the information set by the preservation state setting means 103.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card, and more particularly to an IC card having a function of saving the execution state of the IC card and a function of restoring the execution state.

[0002]

2. Description of the Related Art IC cards have been attracting attention as new information recording media, especially as information recording media to replace magnetic cards, and are becoming increasingly popular. In particular, since an IC card having a built-in CPU has a high degree of security, it is expected to be used in various fields. IC in general
The card contains three types of memories such as RAM, ROM, and EEPROM, all of which are accessed by the built-in CPU. A program (routine program) to be executed by the CPU is stored in the ROM,
The EEPROM stores personal data for the user. The RAM is also used as a work area when the CPU executes instructions.

In a conventional IC card with a CPU, the contents of a volatile memory such as a register or a RAM are initialized to a certain numerical value when the power is turned on / off or the processing is restarted by a RESET signal or the like. Then, after that, the contents of the register and the RAM are rewritten as the processing is executed. The contents of the registers and RAM are not saved in the nonvolatile memory EEPROM for the purpose of saving the state of the IC card. Thus, the conventional IC with CPU
Since the card does not have the function of saving the state of the register or RAM and the function of restoring the saved information to the register or RAM, it was not possible to temporarily suspend the process due to power-off or the like and to continue the recovery again. As a result, in the process of issuing the IC card, when the process is divided into a plurality of stages and operated by different machines, data transmission for the environment setting process occurs in each machine, , Becomes an overhead. Failure analysis is difficult because there is only information about the result of processing as failure analysis information when a card malfunctions. When performing many related batch processes, if the process is interrupted due to a failure such as a power failure, the process must be performed again from the beginning. The environment setting process (operation file selection, operation record selection, etc.) cannot be omitted. There were problems such as.

[0004]

As described above, the conventional IC card with CPU does not have the function of storing the execution state of the IC card and the function of restoring the execution state.
Various problems have arisen and it has been demanded to deal with them.
Under the circumstances, the present invention provides an IC card with a CPU with a function of saving the execution state of the IC card and a function of restoring the execution state, so that the processing of the IC card can be interrupted and restarted from the middle of the processing. Is something that is going to be possible,
At the same time, the purpose is to acquire the operating state of the IC card.

[0005]

The IC card of the present invention comprises:
At least, information such as the status of registers, volatile memory, IO ports, etc. that needs to be set when restarting after power supply is stopped or when processing is started by a reset signal
State saving means for saving in a non-volatile recording unit such as a ROM,
By the information stored in the non-volatile recording unit, the register,
State setting means for setting the state of the volatile memory, IO port, etc., where the state setting is required, storage state setting means for setting information indicating whether the state of the IC card is stored, and the storage state And a set state determining means for reading and determining the information set by the setting means. Then, in the above, a state save instruction recognition means for recognizing an external state save instruction, and / or an external state return instruction requesting that the information stored in the non-volatile recording unit be set in the volatile storage device. Is provided with a state return instruction recognition means for recognizing.

[0006]

The IC card (with the execution state saving function) of the present invention has the function of saving the execution state of the IC card and the function of restoring the execution state by the above-mentioned configuration. The card processing can be resumed from the state at the time of interruption. Also, by providing a means for recognizing a state save command from the outside and a means for recognizing a state return command from the outside, it is possible to save the state and restore the state by the command from the outside at any time. I have to.

[0007]

Embodiments of the IC card of the present invention will be described with reference to the drawings. FIG. 1 is a functional diagram of the IC card of the present embodiment, and based on FIG.
The C card will be explained. As shown in FIG. 1, the IC card of this embodiment includes a state storage means 101, a state setting means 102,
Storage state setting means 103, set state determination means 10
4, state recovery command recognition means 105 and state storage command recognition means 106. The state storage means 101 is
Information such as the status of IC card registers, volatile memory, IO ports, etc. that needs to be initialized when restarting after the supply of power is stopped or when processing is started by a reset signal
It is a means for storing in a non-volatile recording unit such as a ROM. The state setting unit 102 is a unit that performs initial setting of a portion such as a register, a volatile memory, an IO port, or the like that requires initial setting, based on information stored in the nonvolatile recording unit. The storage state setting means 103 is means for setting information indicating whether or not the state of the IC card is stored, and the set state determination means 104 is means for determining the set information. The state saving instruction recognition unit 106 is a unit that determines whether or not there is an instruction to save the state of the IC card register, volatile memory, IO port, etc. from the outside at an arbitrary time or automatically. Command recognition means 10
When 6 recognizes that there is a command, the state saving means 101
Predetermined information is saved by, and then saved state setting means 103 sets the saved state. The state recovery command recognition means 105 uses the information stored in the non-volatile recording unit of the IC card to register, volatile memory, and IO.
It is a means for judging whether or not there is an instruction for initializing a port or the like from the outside, and when the state return instruction recognition means 105 recognizes that there is an instruction, when there is stored information,
The state setting means 102 sets predetermined information and restores it. Note that the IC card of this embodiment can save and restore the state by an external command as described above.
Of course, it is possible to automatically save and restore the state by an internal command.

Next, as the operation of the IC card of the present invention,
First, an example in which information is automatically saved in a volatile storage unit and restoration is performed will be described with reference to FIG. When the IC card is set in the terminal device (S201), the contents of the IC card's registers and volatile memory such as RAM are initialized to a certain numerical value. (S202) Next, the information storage FLAG indicating the instruction status as to whether or not to save the execution information is determined (S203). Next, it is determined whether or not there is stored information (S204). If there is stored information, the stored information is set in the volatile storage unit RAM, and then an instruction from the external (terminal) is received. Receive commands from the outside (terminal). (S205) Next, the information storage FLAG is set to non-storage (S20).
6) Execute commands from the outside (terminal). (S20
7) After that, the state of the volatile storage unit RAM is stored in the nonvolatile storage unit (EEPROM) (S208), and the information storage FL is stored.
Set AG to save. (S209) Hereinafter, S205 to S209 are repeated.

Next, as the operation of the IC card of the present invention,
Secondly, an example in which information is automatically saved in the volatile storage unit and is restored at an arbitrary time by a command will be described with reference to FIG. Set the IC card to the terminal device (S30
1) Then, the contents of the volatile memory such as the register of the IC card and the RAM are initialized to a certain constant value. (S30
2) Next, a command from the outside (terminal) is received (S30
3) It is determined whether or not the received command is a state restoration command. (S304) Here, if it is not the status return command, the information saving FLA
G is set to non-save (S305), and a command from the outside (terminal) is executed. Then, the state of the volatile storage unit RAM is saved in the nonvolatile storage unit EEPROM (S307), and then the information storage FLAG is set to save (S308), and the process proceeds to (S303) again.
If it is a status return command, it is determined whether there is stored information (S310), and if there is stored information, the stored information is set in the volatile memory EEPROM (S31).
1), move to the processing of (S303) again, and if there is not,
Then, the process proceeds to the process of (S303) again.

Next, as the operation of the IC card of the present invention,
Thirdly, an example in which information is restored to the volatile storage unit at an arbitrary time and information is automatically saved will be described with reference to FIG. Set the IC card to the terminal device (S40
1) Then, the contents of the volatile memory such as the register of the IC card and the RAM are initialized to a certain constant value. (S40
2) Next, the information storage FLAG indicating the instruction state as to whether or not to save the execution information is determined (S403). Next, it is determined whether or not there is stored information (S404). If there is stored information, the stored information is set in the volatile storage unit RAM and then an instruction from the outside (terminal) is received (S405). Receives a command from the outside (terminal) as it is. (S
406) Next, the command from the outside (terminal) is received, and the information storage F
After setting the LAG to non-save (S407), it is determined whether the received command is a state save command. (S40
8) Here, if it is not the state save command, the command from the outside (terminal) is directly executed (S408), and the command from the outside (terminal) is received again. (S405) If the command is a state saving command, the state of the volatile storage unit is stored in the nonvolatile storage unit (S410).
The information storage FLAG is set to storage (S411), and a command from the outside (terminal) is received again. (S405)

Next, as the operation of the IC card of the present invention,
Fourthly, an example in which information is restored and stored in the volatile storage unit at an arbitrary time will be described with reference to FIG. When the IC card is set in the terminal device (S501), the contents of the volatile memory such as the registers and RAM of the IC card are initialized with a certain fixed value. (S502) Next, a command from the outside (terminal) is received (S50
3) It is determined whether or not the received command is a state restoration command. (S504) Here, if it is not a state return instruction, it is judged whether it is a state saving instruction (S505), and if it is not a state saving instruction, an instruction from the outside (terminal) is executed (S50).
6) If it is a state save command, after saving the state of the volatile storage unit in the non-volatile storage unit (S510), set the information storage FLAG to save (S511) and again send an instruction from the external (terminal). To receive. (S503) If it is a status return command, it is determined whether or not there is stored information. If there is stored information, the stored information is set in the volatile storage device (S520), and the external (terminal) is restarted. From the outside (terminal) is received again (S503), and if not present, it is left as it is (S521). (S503)

Next, as the operation of the IC card of the present invention,
Fifthly, an example of a stored data reading process for failure analysis will be given and described with reference to FIG. When the IC card is set in the terminal device (S601), the IC card registers and R
The contents of volatile memory such as AM are initialized to a certain constant value. (S602) Next, a command from the outside (terminal) is received (S60
3) It is determined whether or not the received command is a status recovery read command. (S604) If it is not the status read command, the command from the outside (terminal) is executed as it is. After (S605), the command from the outside (terminal) is received again. (S603) If there is a status read command, it is determined whether or not there is saved information (S610). If there is, the status saved information is transmitted to the outside (terminal) (S611), and again the outside (terminal). Terminal). (S603), if not present, the command from the outside (terminal) is received again as it is.
(S603)

[0013]

[Effect] As described above, the IC card of the present invention is provided with the function of storing the execution state of the IC card and the function of restoring the execution state, so that it is possible to restart the IC card from the interrupted state. To do. Further, by reading the state storage information stored in the non-volatile recording section such as the EEPROM, it is possible to easily specify the process and state in which the failure has occurred during the failure analysis of the IC card. Furthermore,
By restarting the processing of the IC card from the middle and reading the stored information, the execution state of the IC card can be checked from the outside.

[Brief description of drawings]

FIG. 1 is a block diagram of an IC card of the present invention.

FIG. 2 is a flow chart of the operation of the essential parts of the IC card of the present invention.

FIG. 3 is a flowchart showing the operation of the main part of the IC card of the present invention.

FIG. 4 is a flow chart of the operation of the essential parts of the IC card of the present invention.

FIG. 5 is a flowchart showing the operation of the essential parts of the IC card of the present invention.

[Explanation of symbols]

 101 State Saving Means 102 State Setting Means 103 Saving State Setting Means 104 Set State Determining Means 105 State Return Command Recognition Means 106 State Saving Command Recognition Means

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[Procedure amendment]

[Submission date] December 2, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a block diagram of an IC card of the present invention.

FIG. 2 is a flow chart of the operation of the essential parts of the IC card of the present invention.

FIG. 3 is a flowchart showing the operation of the main part of the IC card of the present invention.

FIG. 4 is a flow chart of the operation of the essential parts of the IC card of the present invention.

FIG. 5 is a flowchart showing the operation of the essential parts of the IC card of the present invention.

FIG. 6 is a flow chart of the operation of the essential parts of the IC card of the present invention.

[Explanation of reference numerals] 101 state saving means 102 state setting means 103 save state setting means 104 set state determining means 105 state return command recognition means 106 state save command recognition means

Claims (2)

[Claims] 1. At least a register, a volatile memory,
State storage means for storing information such as the state of the IO port that needs to be set in a nonvolatile recording unit such as an EEPROM when restarting after power supply is stopped or when processing is started by a reset signal, and a nonvolatile recording Based on the information stored in the unit, a status setting means for setting the status of a register, a volatile memory, an IO port, etc. where the status needs to be set, and information indicating whether or not the status of the IC card is saved. An IC card comprising a storage state setting means for setting, and a set state determining means for reading and determining the information set by the storage state setting means. 2. The state saving command recognizing means for recognizing a state saving command from the outside according to claim 1, and / or an external request for setting information stored in a non-volatile recording unit in a volatile storage device. And a state return instruction recognition means for recognizing the state return instruction from I.
C card.