JPH08255234A - Ic card - Google Patents

Abstract

PURPOSE: To provide an IC card which can deal with various kinds of terminals different in communication control methods while keeping the hardware configuration of the conventional IC card. CONSTITUTION: An IC card 100 is provided with a communication control processing part (program) inputted from the outside of the IC card 100, communication control processing part input means 101-103 for inputting the communication control processing part (program) and communication control processing executing means 101 for executing the communication control processing part. The command input of the IC card 100 is processed by using the inputted communication control processing part, the inputted command is processed by using a previously mounted processing part, and the response of the command processing result is processed by using the inputted communication control processing part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card with a CPU, and more specifically, a communication control processing unit (program).
The present invention relates to an IC card capable of inputting and using from a terminal into an IC card, that is, enabling arbitrary communication processing control processing of terminals having different processing methods.

[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 addition to the routine program stored in the ROM, an application program suitable for various uses may be input (loaded) from the outside of the IC card to the IC card for processing. Conventionally, a communication control processing program that inputs a command and outputs a response at the time of inputting these application programs and various kinds of processing is a read-only memory (ROM) in an IC card.
I had it remembered inside.

However, in the case of an IC card in which a communication control processing program is stored in a read-only memory (ROM) in the IC card for control, in order to use the IC card in a terminal having a different communication control method. , An IC card having a processing program suitable for the communication control procedure of the terminal must be newly developed, which is a problem.

[0005]

As described above, there has been a demand for the versatility of the communication control processing program for the IC card so that the IC card can be used in terminals having different communication control methods. Under the circumstances, the present invention aims to provide an IC card that can be applied to various terminals having different communication control methods.

[0006]

The IC card of the present invention comprises:
Communication control processing unit (program) input means for inputting a communication control processing unit (program) from outside the IC card, and communication control processing unit (program) storage unit for storing the input communication control processing unit (program) And a communication control processing unit executing means for executing a communication control processing unit (program), wherein a command input of the IC card is processed and input using the input communication control processing unit. The command processing is processed by using a processing unit installed in advance, and the response of the command processing result is processed by using the input communication control processing unit. Then, in the above, the communication control processing unit input means is a ROM, RA
M and CPU, communication control processing unit storage means EEP
It is characterized in that it is composed of a ROM and the communication control processing execution means is composed of a CPU.

[0007]

When the IC card of the present invention is configured as described above, it is possible to provide an IC card that can be applied to various terminals having different communication control methods. Specifically, a communication control processing unit (program) input means for inputting a communication control processing unit (program), a communication control processing unit (program) storage unit for storing the input communication control processing unit (program), and a communication control processing By having the communication control processing execution means for executing the unit, the communication control processing unit (program) can be input from various terminals, and the communication control processing unit (program) can be executed. It is supposed to be compatible with various terminals with different control methods. The above-mentioned communication control processing unit input means is composed of ROM, RAM and CPU, the communication control processing unit storage means is composed of EEPROM, and the communication control processing execution means is composed of CPU. The configuration is designed to support various terminals with different communication control methods.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An IC card embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a diagram showing a hardware configuration of an IC card according to the first embodiment of the present invention, and FIG. 1B is a diagram showing a functional configuration of the IC card according to the first embodiment of the present invention. 1 in FIG.
00 is an IC card, 101 is a CPU, 102 is a ROM,
103 is RAM, 104 is EEPROM, 105 is I /
O line, 106 is V _CC (power supply voltage), 107 is RST
(Reset line), 108 is CLK (clock line), and 109 is GND (ground line). The IC card of this embodiment has a basic hardware configuration as shown in FIG.
As shown in (a), the CP is the same as the conventional IC card.
U101, ROM102 and RAM10 as memory
3, EEPROM 104, I / O line 105, V
_CC (power supply voltage line) 106, RST (reset line) 107, CLK (clock line) 108 and GN
Although it has a D (ground line) 109,
As shown in FIG. 1B, in order to support various terminals having different communication control methods, the communication control section (program) input means for inputting the communication control section (program) from the terminal to the ROM 102, RAM103, CPU1
Communication controller (program) configured by 01 and input
As a communication control unit (program) storage means for storing
The EPROM 104 is allocated and the CPU 101 is allocated as means for executing the input communication control unit (program). The memory area of the RAM 103 is provided with a command and response data set area, a command processing work area, and a communication control work area separately, and the EEPROM 104 memory area is provided with a command input processing program and response output. A communication control processing unit (program unit) for storing a program for processing and the like are provided separately in the user area, and the memory of the ROM 102 has an ATR process, a communication control processing unit input process (input communication Control unit processing),
IC card command processing, IC card command processing,
The IC card response output process (input communication control unit utilization process) is separately provided and used.

As shown in FIG.
00-27FF address is 2EC0 in RAM103
~ 2FBF address is 300 in EEPROM 104
Although 0 to 4 FFF are allocated, the allocation of addresses of each memory will be further described with reference to FIGS. FIG.
Indicates a memory map of the RAM 103.
The 0 address is an area in which command length information received by the communication control unit input in the card or response length information as a result of command processing is set, and 2EC1
The ~ 2EFF address is an area in which the command received by the communication control processing unit input in the card and the response data as the command processing result are set.
The 8F address is a work area when the communication control processing unit input in the card receives a command. Figure 4 shows E
A memory map of the EPROM 104 is shown.
Addresses 0 to 3001 (CMADD) are program start addresses for command input processing, and 3002 to 3
The 003 address (RESADD) is a program start address for outputting a response and is UASP to 4FF0.
The address is the user area area. FIG. 5 shows the ROM 1
02 shows a memory map of 02, ATR processing, communication control processing unit input processing (input communication control unit use processing),
IC card command processing, IC card command processing,
IC card response output process (input communication control unit use process is allocated in the addresses 0000 to 27FF so as not to overlap.

Next, the outline of the processing operation of the IC card will be described with reference to FIG. First, the card performs an ATR process when activated. (S700) Next, it is determined whether or not the communication control unit (program) has been input (S701), and if it has been input, the IC card input command input process is performed based on the communication control unit (program) (S702). If the communication control unit (program) is not input, the communication control unit (program) input process is performed, and the IC card command input process is performed based on the input communication control unit (program). (S702) Next, command processing is performed based on the input command (S703), then IC card response output processing is performed (S704), and the command processing result is sent to the terminal side.

The communication control unit (program) input process is performed according to the operation flow shown in FIG. First,
When the communication control (program) input process is started, FIG.
As shown in (a), an INS (instruction) code, a program start address for command input processing, a program start address for response output, and a LEN code for indicating the length of protocol data,
The system waits for the input of a protocol load command including a CMADD code indicating a program start address for command input processing, a RESADD code indicating a program start address for outputting a response, and a communication control unit program data unit. (S801) If the protocol load command has been input, it is confirmed whether or not the protocol load command has been entered.
(S802) If it is determined that the confirmation result is negative, the process waits for the input of the protocol load command again (S802A). Further, even if the protocol load command is not input due to waiting for input of the protocol load command, the input of the protocol load command continues again. (S801A) If the result of the confirmation is determined to be acceptable, the CMMADD data in the received command data is stored in the EEPROM 3000 of the EEPROM.
Write to address ~ 3001. (S803) Next, the RESADD data in the received command data is written to the addresses 3002 to 3003 of the EEPROM. (S804) Next, the protocol data in the received command data is set to E.
Data is written sequentially from the beginning into the EPROM addresses 3004 to 37FF. (S805) After that, the protocol load command normal end response is sent (S806), and the communication control unit input processing is ended.
As shown in FIG. 6B, the response consists of 2 bytes, 00 is a normal end and FF is an abnormal end.

Further, as shown in FIG. 8 (b), the ATR process outputs an ATR (Answer Torreset) to the terminal side and finishes the process.
The terminal is ready to receive and transmit the communication control unit (program) to the IC card side.

Next, the command input process for writing the communication control unit (program) into the EEPROM will be described with reference to FIG. When the IC card command processing is started, the ROM reads the CMMADD data in the EEPROM. (S901) Next, the address indicated by the CMDADD data is program called (S902). When a program call is made, IC card command input processing is performed in accordance with the communication control processing procedure input into the EEPROM.
(S903) Next, the length of the received command is set to 2EC0 of the RAM (step 904), and the received command data is RA.
The Ms are sequentially set from 2EC1 (S905), and the program processing ends and ends. The above processing is controlled by the ROM, but the processing in steps S903 to S904 is E
This is processing in the EPROM communication control unit.

Next, the IC card command processing will be described with reference to FIG. When the IC card command processing is started, first, command data is read from the command length stored in the 2EC0 address of the RAM and the data stored from the 2EC1 address. (S10
01) Next, it is confirmed whether or not the read command is defined (S1002), and if it is defined, the corresponding command processing is performed. (S1003) If the read command is not defined, the length of the abnormal end processing response is set to the 2EC0 address of the RAM (S1011), and the abnormal end processing response data is set in order from the 2EC1 address of the RAM. (S1012), the process ends. If there is an error when processing the corresponding command, (S101
After the steps 1) and (S1012), the process ends. After processing the corresponding command, the length of the normal termination response is set to the 2EC0 address of the RAM. (S1004) Next, the normal end response data is transferred to the RAM 2EC1.
Are sequentially set from step S1005, and the process ends.

Next, the response output process of the IC card will be described with reference to FIG. When the response output process of the IC card is started, the ROM is the R of the EEPROM.
Read the ESADD address data (S1101), R
Program call the address indicated by the ESADD data. (S1102) When the program is called, response output processing is performed in accordance with the response length data of 2EC0 in the RAM and the communication control processing procedure input from the response from 2EC1 (S1103), and the processing ends. The above-mentioned processing is controlled by the ROM, but the processing in step S1103 is the communication control section processing in the EEPROM.

[0016]

As described above, the IC card of the present invention can be provided with the hardware configuration of the conventional IC card, which is compatible with various terminals having different communication control methods.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an example IC card.

FIG. 2 is a diagram for explaining an address of each memory of the embodiment IC card.

FIG. 3 is a diagram for explaining a memory map of RAM.

FIG. 4 is a diagram for explaining a memory map of an EEPROM.

FIG. 5 is a diagram for explaining a memory map of a ROM.

FIG. 6 is a diagram showing a protocol load command.

[Fig. 7] Flow chart of IC card processing operation

FIG. 8 is a communication control unit input processing flow chart and an ATR processing flow chart.

FIG. 9 is an IC card command input processing flow chart.

FIG. 10: IC card command processing flow chart

FIG. 11 is an IC card response output processing flow chart.

[Explanation of symbols]

100 IC card 101 CPU 102 ROM 103 RAM 104 EEPROM 105 I / O line 106 V _CC 107 RST 108 CLK 109 GND

Claims (2)

[Claims] 1. A communication control processing unit input means for inputting a communication control processing unit from the outside of an IC card, and a communication control processing unit storage unit for storing the input communication control processing unit,
An IC card having a communication control processing execution unit that executes a communication control processing unit, wherein command input of the IC card is processed using the input communication control processing unit,
The IC card is characterized in that the input command processing is processed by using a processing unit installed in advance, and the response of the command processing result is processed by using the input communication control processing unit. 2. The communication control processing unit input means according to claim 1, comprising ROM, RAM and CPU, the communication control processing unit storage means comprising EEPROM, and the communication control processing executing means comprising CPU. IC card.