JP2010198208A - Contactless portable electronic device and contactless ic card - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contactless portable electronic device and a contactless IC card, wherein it is not necessary to perform data writing over again from the beginning even if an error occurs in the middle of the data writing into a memory and wherein drastic reduction effect of a processing time is expected in some writing data length. <P>SOLUTION: The contactless IC card receives an electromagnetic wave transmitted from a contactless card reader/writer, generates an operation voltage by the received electromagnetic wave to operate, performs processing of writing data into a nonvolatile memory based on a writing command transmitted from the contactless card reader/writer, and transmits the processing results thereof to the contactless card reader/writer. When the error occurs in the middle of the writing of the data into the nonvolatile memory and when the writing is normally completed to the middle, the contactless IC card adds, to a response of that effect, data indicating at least one of length of data wherein the writing is normally completed, length of data wherein the writing is not completed, and an address wherein failing in the writing into the memory, and transmits them to the contactless card reader/writer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention operates, for example, by receiving an electromagnetic wave transmitted from a non-contact type card reader / writer and generating an operating voltage using the received electromagnetic wave, and writing transmitted from the non-contact type card reader / writer. A non-contact portable electronic device such as a non-contact type IC card (also referred to as a wireless card) which performs a process of writing data to a non-volatile memory based on a command and transmits the processing result to a non-contact type card reader / writer; The present invention relates to a non-contact type IC card.

  In general, this type of non-contact type IC card receives an electromagnetic wave transmitted from a non-contact type card reader / writer, generates an operating voltage using the received electromagnetic wave, and operates from the non-contact type card reader / writer. Receives data transmitted by the amplitude modulation method, detects the amount of amplitude change from the received amplitude-modulated data waveform, demodulates the received data, performs various data processing, and the processing result is a non-contact type card The data is sent to the reader / writer.

  In such a non-contact type IC card, data is exchanged with a non-contact type card reader / writer using a command or a response.

  By the way, in such a non-contact type IC card that uses electromagnetic waves for communication with the non-contact type card reader / writer, data is written to the nonvolatile memory based on a write command transmitted from the non-contact type card reader / writer. When processing, if an error occurs during data writing to the non-volatile memory, or if it conforms to the non-contact IC card communication protocol, the non-contact type card reader It is supposed to respond to the writer (see, for example, Non-Patent Document 1 and Patent Document 1).

JP-A-10-63895

International standard ISO / IEC14443

  As described above, in the non-contact type IC card that uses electromagnetic waves for communication, when an error occurs during the data writing to the nonvolatile memory, a write error or no response is returned to the non-contact type card reader / writer. become. Therefore, when data is written again, it is necessary to start over from the beginning, and there is a problem that the data portion that has been normally written is wasted and the time required for data writing is wasted.

  Therefore, the present invention eliminates the need to start data writing from the beginning even if an error occurs during data writing to the memory, and can be expected to greatly reduce the processing time depending on the write data length. An object is to provide a possible electronic device and a non-contact type IC card.

  The non-contact portable electronic device of the present invention operates by receiving an electromagnetic wave transmitted from an external device, generating an operating voltage from the received electromagnetic wave, and based on a write command transmitted from the external device. In the non-contact portable electronic device that performs processing for writing the data added to the write command to the memory and transmits the processing result to the external device, an error occurs during the writing of the data to the memory, When data writing has been normally completed halfway, there is provided a means for transmitting a response indicating that data has been normally written halfway to the external device.

  The non-contact type IC card of the present invention includes an antenna unit for performing non-contact communication with an external device, and an electromagnetic wave that is electrically connected to the antenna unit and transmitted from the external device. A process that operates via an antenna unit, generates an operating voltage from the received electromagnetic wave, and writes data added to the write command to the memory based on the write command transmitted from the external device. An IC chip having a function of transmitting the processing result to the external device via the antenna unit, and a card body integrally containing the antenna unit and the IC chip, If an error occurred during the writing of data to the memory and data writing was completed partway through, data could be written partway through The response via the antenna unit, characterized by comprising means for transmitting to the external device.

  According to the present invention, even if an error occurs in the middle of data writing to the memory, there is no need to rewrite the data from the beginning, and a non-contact type mobile phone that can be expected to greatly reduce the processing time depending on the write data length. Possible electronic devices and contactless IC cards can be provided.

1 is a block diagram schematically showing the configuration of a non-contact IC card as a non-contact portable electronic device according to a first embodiment of the present invention. The top view which shows typically the external appearance structure of a non-contact-type IC card. The flowchart explaining a process when an error generate | occur | produces in the middle of writing data with respect to a non-volatile memory.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 schematically shows a configuration of a non-contact type IC card as a non-contact type portable electronic device according to the present invention. The non-contact type IC card includes a transmission / reception antenna unit 11 for transmitting / receiving data to / from a non-contact type card reader / writer 10 as an external device, and the non-contact type card reader / writer 10 received by the transmission / reception antenna unit 11. A power generation unit 12 that generates a stabilized DC voltage by rectifying and smoothing the power wave from the rectifier circuit and supplies it as an operating voltage to each functional unit (functional units 13 to 19 to be described later). A clock (CLK) generation unit 13 that generates an operation clock from the generated power wave and supplies it to each functional unit (functional units 14 to 19 to be described later), a demodulation unit 14 that demodulates received data, and a modulation unit 15 that modulates transmission data The control unit 16 and the control unit 16 as control means for performing transmission / reception data communication control and various interrupt processing, as well as various data processing and overall control. ROM (read-only memory) 17 in which control programs and the like are stored in advance, RAM (random access memory) 18 in which temporary data writing / reading is performed, and EEPROM (in which various data are stored) Non-volatile memory 19 such as an electrically erasable and programmable read-only memory is configured.

  As described above, the transmission / reception antenna unit 11 is for performing non-contact communication with the non-contact type card reader / writer 10, and the antenna coil L and the capacitor C form an LC resonance circuit. It is tuned to a resonance frequency at which electromagnetic waves (13.56 MHz) from the contact card reader / writer 10 can be efficiently received.

  As described above, the control unit 16 performs communication control of transmission / reception data, various interrupt processing, and various data processing and overall control. The control unit 16 is configured mainly by a CPU (Central Processing Unit). Yes.

  Each of the other functional units 12 to 16 excluding the transmission / reception antenna unit 11 is composed of one (or a plurality) of IC chips 20, and the IC chip 20 and the transmission / reception antenna unit 11 are electrically connected. Are integrated into an IC module 21, and the IC module 21 is housed (embedded) in the IC card body 22 as shown in FIG.

  Next, the basic operation of the non-contact type IC card configured as described above will be briefly described.

  Data transmission / reception between the non-contact type IC card and the non-contact type card reader / writer 10 is performed by an electromagnetic induction method using the antenna unit 11. The non-contact type card reader / writer 10 internally creates transmission data to the non-contact type IC card and transmits it as a modulation signal to the non-contact type IC card via the antenna unit 11.

  The non-contact type IC card existing in the communication area receives data modulated by the antenna unit 11. The received data is demodulated by the demodulator 14 and sent to the controller 16. The control unit 16 operates according to the control program stored in the ROM 17 and performs processing such as analysis of received data and storing received data in the nonvolatile memory 19. The received data may be temporarily written in the transmission / reception buffer in the RAM 18.

  Thereafter, the control unit 16 reads and writes the received data in the nonvolatile memory 19 and creates transmission data for response. The transmission data is sent from the control unit 16 to the modulation unit 15 and modulated, and the modulated signal is transmitted from the antenna unit 11 to the non-contact card reader / writer 10.

  Next, processing when an error occurs during data writing to the nonvolatile memory 19 will be described in detail with reference to the flowchart shown in FIG.

  The non-contact type IC card is activated by the non-contact type card reader / writer 10, and then a write command is transmitted from the non-contact type card reader / writer 10 to the non-contact type IC card. When receiving a write command from the non-contact type card reader / writer 10 (step S1), the control unit 16 writes data added to the write command to the nonvolatile memory 19 as specified by the write command. Is executed (step S2).

  Next, the control unit 16 checks whether or not the data writing process to the non-volatile memory 19 is normally completed (step S3), and if the data writing process is normally completed, a response to that effect (for example, , Status code: 90 00) is transmitted to the non-contact type card reader / writer 10 (step S4).

  Here, a specific example of the check in step S3 will be described. Generally, since data is transmitted from the non-contact type card reader / writer 10 every 250 bytes, the check is performed every 250 bytes.

  As a result of the check in step S3, if the data writing process is not completed normally (when an error occurs), it is checked whether or not the data writing process is normally completed halfway (step S5). If the data writing process does not end normally halfway, a response to that effect (for example, status code: 6581) is transmitted to the non-contact card reader / writer 10 (step S6).

  As a result of the check in step S5, when the data writing process is normally completed halfway, a response (for example, status code: 6581) indicating that the data has been normally written halfway is transmitted to the non-contact card reader / writer 10. (Step S6).

  Further, when a response indicating that data has been normally written to the middle is responded to the contactless card reader / writer 10, the length of data that has been normally written, the length of data that has not been written, and non-volatile The data indicating at least one of addresses (addresses) that failed to be written to the volatile memory 19 may be added to the response and transmitted to the contactless card reader / writer 10.

  As described above, when an error occurs during the data writing to the nonvolatile memory 19 and the writing is normally completed halfway, a response indicating that the data can be normally written halfway is sent to the contactless card reader / writer. By responding to 10, there is no need to re-write data from the beginning, and a significant reduction in processing time can be expected depending on the data length of writing.

  In addition, when a response indicating that data has been normally written to the middle is responded to the non-contact type card reader / writer 10, data is written again by adding data indicating the length of data that has been normally written. At this time, the transmission / reception and writing time can be shortened by sending the difference write data from the contactless card reader / writer 10. In particular, the longer the write data and the data that has been normally written halfway, the more effective.

  In addition, when a response indicating that the writing has been normally completed halfway is made to the contactless card reader / writer 10, writing is performed again by adding data indicating the length of data that has not been written. At this time, the sending / receiving and writing time can be shortened by sending the writing data for which the writing is not completed from the non-contact type card reader / writer 10. In particular, the longer the write data and the data that has been normally written halfway, the more effective.

  Further, when a response indicating that the writing has been normally completed halfway is made to the contactless card reader / writer 10, writing is performed again by adding data indicating an address in which writing to the nonvolatile memory 19 has failed. At this time, it is only necessary to transmit the remaining write start address and data from the contactless card reader / writer 10, and the transmission / reception and writing time can be shortened. In particular, the longer the write data and the data that has been normally written halfway, the more effective.

  DESCRIPTION OF SYMBOLS 10 ... Non-contact-type card reader / writer (external device), 11 ... Transmission / reception antenna part, 12 ... Power supply generation part, 13 ... Clock (CLK) generation part, 14 ... Demodulation part, 15 ... Modulation part, 16 ... Control part ( Control means), 17 ... ROM, 18 ... RAM, 19 ... nonvolatile memory (EEPROM), 20 ... IC chip, 21 ... IC module, 22 ... IC card body.

Claims (4)

Operates by receiving an electromagnetic wave transmitted from an external device and generating an operating voltage from the received electromagnetic wave. Based on a write command transmitted from the external device, data added to the write command is stored in a memory. In the non-contact portable electronic device that performs the writing process and transmits the processing result to the external device,
When an error occurs in the middle of data writing to the memory and the data writing has been normally completed halfway, there is provided means for transmitting a response to the effect that the data has been normally written to the external device. A non-contact portable electronic device. Operates by receiving an electromagnetic wave transmitted from an external device and generating an operating voltage from the received electromagnetic wave. Based on a write command transmitted from the external device, data added to the write command is stored in a memory. In the non-contact portable electronic device that performs the writing process and transmits the processing result to the external device,
First determination means for determining whether or not data writing to the memory has been completed normally;
As a result of the determination by the first determination means, when writing of data to the memory is normally completed, means for transmitting a response to that effect to the external device;
As a result of the determination by the first determination means, when the data writing to the memory is not normally terminated, a second determination means for determining whether or not the data writing has been normally completed halfway;
As a result of the determination by the second determination means, if the writing of the data is not normally completed halfway, means for transmitting a response to that effect to the external device;
As a result of the determination by the second determination means, if the data writing has been normally completed halfway, the length of the data that has been normally written and the data that has not been written in the response to that effect Means for adding data indicating at least one of the length of the address and the address at which writing to the memory has failed and transmitting the data to the external device;
A non-contact type portable electronic device comprising: An antenna unit for non-contact communication with an external device;
The antenna unit is electrically connected to the antenna unit and receives an electromagnetic wave transmitted from the external device via the antenna unit. The operating unit generates an operating voltage using the received electromagnetic wave, and is transmitted from the external unit. An IC chip having a function of performing processing for writing data added to the write command to the memory based on the write command, and transmitting the processing result to the external device via the antenna unit;
Comprising a card body integrally housing the antenna portion and the IC chip;
In the case where an error occurs during the writing of data to the memory and the data writing is normally completed halfway, the IC chip sends a response indicating that the data has been normally written halfway through the antenna unit. A non-contact type IC card comprising means for transmitting to a device. An antenna unit for non-contact communication with an external device;
The antenna unit is electrically connected to the antenna unit and receives an electromagnetic wave transmitted from the external device via the antenna unit. The operating unit generates an operating voltage using the received electromagnetic wave, and is transmitted from the external unit. An IC chip having a function of performing processing for writing data added to the write command to the memory based on the write command, and transmitting the processing result to the external device via the antenna unit;
Comprising a card body integrally housing the antenna portion and the IC chip;
The IC chip is
First determination means for determining whether or not data writing to the memory has been completed normally;
As a result of the determination by the first determination means, when the data writing to the memory is normally completed, means for transmitting a response to that effect to the external device via the antenna unit;
As a result of the determination by the first determination means, when the data writing to the memory is not normally terminated, a second determination means for determining whether or not the data writing has been normally completed halfway;
As a result of the determination by the second determination means, if the writing of the data is not normally completed halfway, means for transmitting a response to that effect to the external device via the antenna unit;
As a result of the determination by the second determination means, if the data writing has been normally completed halfway, the length of the data that has been normally written and the data that has not been written in the response to that effect Means for adding data indicating at least any one of the length and the address in which writing to the memory has failed and transmitting the data to the external device via the antenna unit;
A non-contact type IC card comprising:

Images