JP2580160B2 - LSI card reader / writer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LSI card set detection device for detecting whether an LSI card is correctly set in a reader / writer.

[Conventional technology]

Recently, LSI cards have been attracting attention as data collection and various management work in factories and sales offices, and as a backup memory for devices. This LSI card has a structure in which an LSI gate array, LSI memory, power and clock sheet coil, write sheet coil, read sheet coil, read / write switch coil, backup lithium battery, etc. are sealed in a plastic card. Is set on the lead writer, and data is exchanged between them. This lead writer is provided with a plurality of coils corresponding to each sheet coil of the LSI card, and performs non-contact data transmission and power supply by magnetic coupling. Therefore, this LSI card is a conventional contact-type IC
Compared with a card (for example, Japanese Patent Application Laid-Open No. Sho 62-17869), it has excellent advantages such as high physical strength, no poor contact, and no influence of static electricity.

In order to eliminate data transmission / reception errors, the conventional reader / writer is provided with a reflection type photosensor, and transmits / receives data after detecting that the LSI card is correctly set at a predetermined position.

[Problems to be solved by the invention]

In the above-mentioned conventional lead writer, since the set of the LSI card is detected by the reflection type photo sensor, there are the following problems. That is, if dust or the like adheres to the photosensor, it may be erroneously detected that the LSI card has been set even though the LSI card is not set. In addition, when the LSI card is not set correctly, for example, when the front and back and the front and back are reversed, the photosensor detects the LSI card, so that a substantial erroneous detection occurs. As described above, when the LSI card is erroneously detected, the reader / writer starts data transmission / reception, so that a system error occurs.

Further, since data is transmitted and received by magnetic coupling between the sheet coil of the LSI card and the coil of the reader / writer, a feeling of completion of setting is not obtained much as compared with a contact-type card using a connector. Therefore, the card may be set at a position slightly deviated from the normal position. In this case, there is only a slight deviation, and data transmission / reception may be possible due to magnetic coupling. However, if set in such a shifted state, there is a problem that a data reading error or a writing error occurs due to a decrease in signal level, and reliability is reduced.

[Object of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an LSI card reader / writer which can surely detect the setting of an LSI card at a proper position, and which does not cause a reading error or a writing error. It is.

[Means for solving the problem]

In order to achieve the above object, the present invention provides an LSI card in an LSI card system for reading and writing data from and to a memory of the LSI card via a sheet coil of the LSI card loaded at a regular position in a card set section. Wherein the LSI card is placed at a position corresponding to the sheet coil when the LSI card is loaded in the card set portion at a regular position, and the coil is magnetically coupled with the sheet coil in a state where the LSI card is loaded. And a magnetic coupling between the sheet coil and the coil of the LSI card.
Means for supplying power and a clock to the I card, and a magnetic coupling between the sheet coil and the coil after the read signal is sent to the LSI card by magnetic coupling between the sheet coil and the coil to bring the LSI card into a reading state. Collation data reading means for reading collation data from the memory, collation data reading determination means for judging whether or not collation data has been read by the reading means, and detecting the level of a read signal from the collation data reading means, When the collation data is read and the read signal level is equal to or more than a predetermined value, based on the judgment results from the signal level judgment means for judging whether or not the signal level is equal to or more than a predetermined value, and the judgment result from the collation data reading judgment means and the signal level judgment means. Is determined to be a normal set position, otherwise it is determined to be a defective set and an alarm is issued Means.

The collation data may be stored in the LSI card in advance as a keyword, or the lead writer may alternately repeat writing and reading of the collation data, and may write the collation data during that time. Further, writing and reading of collation data may be performed using a conventional sheet coil, and a sheet coil dedicated to collation may be added.

[Action]

The read writer reads the collation data written in advance or the collation data written immediately before from the LSI card. Then, the level of the read signal at this time is detected, and it is determined whether or not this level is equal to or more than a certain value. Further, it is determined whether or not the collation data has been read. Based on these determination results, the LSI card is determined to be at the normal set position when the collation data is read and the read signal level is equal to or higher than a predetermined value. After this determination, transmission / reception of data between the reader / writer and the LSI card is started.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment FIG. 3 shows the configuration of an LSI card. The LSI card 10 includes a power supply and clock sheet coil 11, a write sheet coil 12, a read sheet coil 13, a read / write switch sheet coil 14, a verification sheet coil 15, an LSI
Memory 16, LSI gate array 17, lithium battery 18, power supply circuit
19 and the like are enclosed in the plastic card 20.

The power supply and clock sheet coil 11 constitutes one of the transformer coils, and by mutual induction,
A clock pulse is received from the lead writer 26 (see FIG. 4). This clock pulse is sent to the power supply circuit 19,
Here, after DC conversion and constant voltage conversion, the LSI memory 16,
Power is supplied to the LSI gate array 17 and the like. The clock pulse is sent to a timing circuit (not shown), where necessary drive pulses are formed, and these drive pulses are supplied to the LSI memory 16, the LSI gate array 17, and the like.

The light sheet coil 12 receives serial data from the lead writer 26 by mutual induction,
The data is written to the LSI memory 16 via the LSI gate array 17. The lead sheet coil 13 is connected to the L through the LSI gate array 17.
The data read from the SI memory 16 is converted into a magnetic signal and sent to the reader / writer 26. The read / write switch sheet coil 14 is for receiving a read / write signal from the read / writer 26.

The collation sheet coil 15 is added to a conventional LSI card in order to detect that the LSI card 10 is correctly set on the reader / writer 26. The collation sheet coil 15 can be used for writing or reading data other than at the time of collation. Further, the conventional sheet coil 13 for lead may be used without specially installing the sheet coil 15 for collation. Further, when the collation data is written and then read, the write sheet coil 12 and the read sheet coil 13 may be used.

The LSI memory 16 is for storing fixed data for setup of the external device 35 (see FIG. 4), operating data output from the external device 35, and the like. This LSI memory 1
6 is backed up by a battery 18 in order to prevent the written data from being lost. The LSI gate array 17 is for controlling the direction of data transmission and reception.

FIG. 4 shows an outline of the LSI card system. The lead writer body 25 is provided with a lead writer 26 and a card insertion hole 27. This lead lighter
The 26 is provided with a plurality of sheet coils so as to correspond to each sheet coil enclosed in the LSI card 10. In the drawing, only the sheet coils 28 and 29 corresponding to the write sheet coil 12 and the read sheet coil 13 are shown.

The CPU 32 is connected to the L via the I / O port 33 and the read tiler 26.
It reads data serially from the SI card 10 or writes serial data to the LSI card 10. The CPU 32 controls various external devices 35, such as a photographic printer, using the data read from the LSI card 10 and the data in the memory 34. This memory 34 is ROM, RA
M is used for storing programs, writing and reading data. The alarm 36 is for warning that the LSI card 10 is not set correctly.

Next, the detection of the set of the LSI card will be described with reference to FIG. When using the external device 35, the LSI card 10 is inserted into the card insertion hole 27 of the lead writer body 25. When data is exchanged with the LSI card 10, the LSI card is detected in the card detection mode first, and then the data is exchanged in the access mode.
In this card detection mode, the LSI card 10 is supplied from the reader / writer 26 via the power supply and clock sheet coil 11.
Is supplied with power. Further, the CPU 32 sends a read signal to the LSI card 10 via the I / O port 33 and the read writer 26. When this read signal is detected by the read / write switch sheet coil 14, the LSI memory 16 and the LSI gate array
17 is in a read state, and the collation data previously written in the LSI memory 16 is sent out from the collation sheet coil 15 as a magnetic signal.

If the LSI card 10 is correctly set in the read writer 26, the read writer 26
Can receive collation data. The collation data read by the reader / writer 26 is sent to the CPU 32,
A collation determination is made as to whether the data matches the collation data stored in the memory 34. If the read collation data is correct, it is determined that the LSI card 10 is set correctly. On the other hand, LSI card 1
If 0 is not set in the lead writer 26 or is not set correctly (when the front and back or front and rear are reversed), the read writer 26 cannot receive the collation data from the LSI card 10. Further, the CPU 32 detects the signal level of the read collation data and compares whether the signal level is equal to or more than a predetermined value. This predetermined value is determined in advance based on whether a read or write error occurs. If the read signal level is equal to or higher than the predetermined value, the CPU 34 determines that the card is set at the normal position. If it is less than the predetermined value, it is determined that the card is set at a position shifted from the normal position. Therefore, the CPU 32 determines whether or not the card is at the normal position based on two conditions, that is, whether the reader / writer 26 has received the collation data and whether the level of the read signal is equal to or higher than a predetermined value. Can be detected whether or not is set correctly. If the LSI card 10 cannot be detected after a predetermined time has elapsed since the start of the card detection mode, the alarm 36 is driven to display a warning that the LSI card 10 should be set correctly.

When the LSI card 10 set is detected, the access mode is set.
Data is read or written to / from the LSI card 10 via 6. In this case, the read / write switch sheet coil 14 receives the read / write signal, and sets the LSI memory 16 and the LSI gate array 17 to the read state or the write state. In this read state, the data written in the LSI memory 16 is sent to the read writer 26 via the read sheet coil 13. In the write state, the data sent from the read / write unit 26 is received by the write sheet coil 12, and is sent to the L level through the LSI gate array 17.
The data is written to the SI memory 16.

In the above-described embodiment, the collation data is stored in the LSI card 10 in advance, but the collation data is written in the LSI card 10 instead, and if the written data can be read, the LSI card 10 May be determined to be set correctly. FIG. 2 shows this embodiment. In this embodiment, the light sheet coil 12
And the sheet coil 13 for reading, the sheet coil 15 for collation need not be provided. Of course, instead of the lead sheet coil 13, the collating sheet coil 15
May be used.

In the card detection mode, the write cycle and the read cycle are alternately repeated until the CPU 32 detects a card. First, in a write cycle, the CPU 32 sends out a write signal from the reader / writer 26 and sends out collation data stored in the memory 34. When the LSI card 10 is correctly set, a write signal is received by the read / write switch sheet coil 14, collation data is received by the write sheet coil 12, and this can be written to the LSI memory 16. On the other hand, if the LSI card 10 is not set correctly, the collation data cannot be written to the LSI memory 16.

Next, because of a read cycle, the CPU 32 sends a read signal to read the collation data written in the LSI memory 16. If the LSI card 10 is set correctly, the collation data written in the write cycle is read out via the read sheet coil 13 and it can be determined whether or not the collation data is the predetermined collation data.

Moreover, as in the above-described embodiment, the signal level of the collation data read out by the CPU 32 is detected, and it is compared whether or not this is a predetermined value or more. If the read signal level is equal to or higher than the predetermined value, the CPU 32 determines that the card is set at the normal position. If it is less than the predetermined value, it is determined that the card is set at a position shifted from the normal position. Therefore, the CPU 32 determines whether or not the card is at the normal position based on two conditions, that is, whether the reader / writer 26 has received the collation data and whether the level of the read signal is equal to or higher than a predetermined value. Then, when the reader / writer 26 receives the collation data and the level of the read signal is equal to or higher than the predetermined value, the CPU 32 determines that the LSI card 10 is set correctly, sets the access mode as described above, and sets the access mode as described above. Read and write. If the collation data cannot be read from the LSI card 10, or if the read signal level is lower than the predetermined value, it is determined that the LSI card 10 is not set correctly. In this case, the write cycle and the read cycle are alternately repeated until the collation data is read from the LSI card 10. If the collation data cannot be read out after a certain period of time, an alarm 36 is displayed as a warning.

〔The invention's effect〕

As described in detail above, according to the present invention, it is determined whether or not the collation data has been read and whether or not the level of the read signal is equal to or higher than a predetermined value, and the LSI card is set to the normal position based on these. If it is detected whether or not the LSI card is set, the set of the LSI card can be detected without using a conventionally required card detection sensor such as a photo sensor. Therefore, since a photo sensor or the like is not required, the configuration can be simplified. In addition, erroneous detection due to dust or the like attached to the photosensor can be eliminated, and maintenance such as removal of dust and adjustment of the detection level is not required. Also, since the envy of the LSI card and whether the front and back are correct can be detected, the detection of the card is ensured.

Furthermore, the level of the read signal is checked, and if the signal level is equal to or higher than a predetermined value, it is determined that the card is set correctly. Can be reliably detected. As a result, it is possible to prevent a read or write error from occurring when the LSI card is misaligned.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an embodiment of the present invention in which a set of an LSI card is detected by reading collation data written in advance on the LSI card. FIG. 2 is a flowchart showing an embodiment in which collation data is written to an LSI card and then read to detect a set of the LSI card. FIG. 3 is an explanatory view schematically showing an LSI card used in the embodiment of FIG. 1. FIG. 4 is a block diagram showing an LSI card system. 10 LSI chip 15 Sheet coil for verification 16 LSI memory 26 Lead writer 27 Card insertion hole 38 Sheet coil for detection.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takaaki Terashita 798 Miyadai, Kaisei-cho, Ashigara-gun, Kanagawa Prefecture Fuji Photo Film Co., Ltd. (56) References JP-A-61-283979 (JP, A)

Claims (3)

(57) [Claims] 1. An LS loaded in a card set portion at a regular position.
In an LSI card reader / writer in an LSI card system for reading and writing data from / to the memory of the LSI card via a sheet coil of the I card, when the LSI card is loaded into the card set portion at a regular position, It is located at the position corresponding to the sheet coil,
A coil that is magnetically coupled to the sheet coil in a state where the LSI card is loaded; a unit that supplies power and a clock to the LSI card by magnetic coupling between the sheet coil and the coil of the LSI card; Verification data reading means for transmitting a read signal to the LSI card by magnetic coupling with the coil to bring the LSI card into a read state, and then reading collation data from memory by magnetic coupling between the sheet coil and the coil; Collation data read determination means for determining whether or not collation data has been read, signal level determination means for detecting the level of a read signal from the collation data reading means and determining whether the signal level is equal to or greater than a predetermined value. According to the judgment results from the collation data reading judgment means and the signal level judgment means, the collation data is determined. Means for determining that the set position is normal when the read signal level is equal to or higher than a predetermined value, and for determining otherwise that the set is defective, and issuing an alarm. Writer. 2. The LSI card reader / writer according to claim 1, wherein said collation data is written in an LSI card in advance. 3. The LSI card reader / writer according to claim 1, wherein said collation data is written on the LSI card immediately before reading.