JPH06150075A - Data processor - Google Patents

Abstract

PURPOSE:To eliminate malfunction caused by noise at the time of attaching/ detaching a storage medium by detecting the attachment/detachment of the storage medium from the move of an eject button and stopping the data transfer of the data processor while attaching/detaching the storage medium. CONSTITUTION:A notch 21 and a move detector 23 sufficienlly come close to each other only during the attachment/detachment of an IC card (a) and set in the position relation to release, the push-down of a switch. Namely, the head of the move detector 23 is smoothly moved on a surface from one edge of the notch 21 to the opposite edge along the slope according to the attaching/ detaching operation. This move detector 23 is prepared in a type to turn off the switch and to open a gap between two poles when the push-down is released. One of two poles is connected to the signal ground of the data processor, the other pole is turned to an attach/detach signal 24, and this signal 24 is pulled up to a power source by a resistor 25 and inputted to a hold pin 27 of a CPU 26 for totally controlling the data processor. When a high level is inputted to the hold pin 27, the CPU 26 automatically stops operating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device which uses a storage medium such as an IC card as an auxiliary device.

[0002]

2. Description of the Related Art In recent years, a data processing device as an auxiliary device is a storage medium having high portability, operability and versatility.
C cards are often used. This trend is expected to become more pronounced with the standardization, price reduction, and capacity increase of IC cards.

A conventional data processing apparatus will be described below with reference to the drawings. FIG. 3 is a conceptual diagram when the IC card 1, the CPU 2, and the electronic components 3, 4 and 5 of the conventional data processing device are connected by the common bus 6. In the data processing apparatus configured as described above, the CPU 2
Considering the operation of reading data from the IC card 1,
As shown in the figure, data transfer from the IC card 1 to the CPU 2 occurs. At this time, the electronic components 3, 4, and 5 are in the inactive state, and do not affect the transferred data.

However, assuming that the IC card 1 is attached or detached during the operation of the data processing apparatus, the CPU 2 is reading the data of the electronic component 3 as shown in FIG. If the IC card 1 is attached or detached at this moment, noise is generated on the bus 6. This noise is due to electrical characteristics of the circuit board or the IC card 1, such as charge and discharge with respect to a capacitive load that is momentarily connected or removed, and signal chattering.
This is generated by being entangled with the state of attachment / detachment, and the logic level of the signal of the other party may be inverted.
There may be a situation in which data having an incorrect value is transferred to PU2.

Therefore, as shown in FIG. 4, only the IC card 1 is connected to the dedicated bus 8 separated from the bus 6 by the buffer 7, and the noise generated in the dedicated bus 8 by the attachment / detachment of the IC card 1 is caused by the buffer 7. Measures such as shutting off are taken. As long as the IC card 1 can be easily attached and detached, measures such as the buffer 7 are indispensable.

[0006]

However, in the above-mentioned conventional configuration, when a user is allowed to freely attach and detach the IC card, it is necessary to provide a dedicated bus for the IC card.
One of the appeal points of the IC card is that it is easy to put on and take off.
I would like to allow attachment and detachment during operation. On the other hand, a data processing device using such an IC card is being miniaturized,
The actual situation is that it is difficult to secure an area for placing a buffer for providing a new bus. If the data processing device has an LSI that controls the bus as a whole, it is possible to eliminate the buffer and incorporate the function into this LSI. At this time, however, a new bus for the IC card is newly added. It cannot be escaped from the necessity of providing it, and it is difficult to realize it considering that there are dozens of card buses. As a simple measure, there is a method of inserting a damping resistor in series between the IC card and the data processing device to reduce noise, but since it is not an essential solution, the effect of improvement cannot be predicted. Had.

The present invention solves the above-mentioned problems of the prior art. The noise is not suppressed by detecting the progress of attachment / detachment of an IC card and interrupting the processing operation.
It is an object of the present invention to provide a data processing device that does not transfer data when noise may occur.

[0008]

In order to achieve the above-mentioned object, a data processing apparatus of the present invention comprises an eject button which is interlocked with an operation of inserting and removing a storage medium into and from an electric apparatus body, and a movement for detecting the operation of the eject button. The processing operation of the data processing device itself is stopped during the attachment / detachment of the storage medium based on the attachment / detachment signal generated when the detector and the movement detector detect that the storage medium has been removed or inserted into the main body of the electric device. And a processing stopping means.

[0009]

With this configuration, since the movement detector detects the movement of the eject button, it is possible to know the attachment / detachment of the storage medium. As soon as the attachment / detachment of the storage medium is detected by the movement detector, an attachment / detachment signal is generated to perform data processing. By interrupting the processing operation of the device itself, it is possible to put the device in a state where data transfer does not occur. Therefore, the processing operation at the moment when noise may occur in the data does not occur, and the malfunction due to the incorrect data transfer can be avoided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a conceptual diagram of a mechanism and a circuit showing a state in which an IC card is mounted on a data processing device according to an embodiment of the present invention. As shown in FIG. 1, as a mechanism for using an IC card, a fitting portion 9 into which the IC card 1 is fitted, a card case 10 that holds the entire card, an eject plate 11 that supports the card base, and an eject Plate 1
Arm 13 for connecting 1 and the eject button 12,
14 and 15. Arm 13 is a fulcrum 16
To arm 14 and fulcrum 17 to arm 15
, The arm 14 is connected to the card case 10 by a fulcrum 18, the arm 14 is connected to the eject plate 11 by a fulcrum 19, and the arm 15 is connected to the eject button 12 by a fulcrum 20. 18 is s, and the distance between the fulcrums 17 and 18 is t). The notch 21 characteristic of the present invention is provided on the side surface of the eject button 12, and the eject button 1 is provided on the bottom.
A spring 22 having a length longer than the natural length even when 2 is pushed in (that is, always generates a force in the pulling direction)
The two-pole push switch type movement detector 23 is installed on the opposite side of the notch 21. The notch 21 and the movement detector 23 are sufficiently close to each other only while the IC card 1 is being attached / detached, and the pressing of the switch is released (that is, the tip of the movement detector 23 is notched 21 according to the attachment / detachment operation). The surface from the end to the opposite end moves smoothly along the slope.
(B) and (c) will be described in detail). The movement detector 23 is of a type in which the switch is turned off when the depression is released and the two poles are opened. One of the two poles is connected to the signal ground of the data processing device, and the other is the detachable signal 2
It becomes 4. This signal is pulled up to the power supply by the resistor 25, and the CPU 26 that controls the data processing device as a whole.
Is input to the hold pin 27. The CPU 26 has a function of stopping its own operation when a high level is input to the hold pin 27. In this embodiment, the stop means is CP.
It will be built into U26.

Before explaining the operation in this configuration, the positional relationship between the notch 21 and the movement detector 23, which changes with attachment and detachment, will be described with reference to FIGS. 2 (a), 2 (b) and 2 (c).

FIG. 2A shows the notch 21 and the movement detector 2 in a state where the IC card 1 is completely fitted in the fitting portion 9 (a state where the eject button 12 is most outwardly projected).
It is an expansion of the relationship of 3. Point P is the movement detector 23
Is a movable front end point, and in this state, it is set to be on the side farther from the notch 21 than the terminal point Q of the slope A of the notch 21. Further, the distance between the point P and the upper surface of the movement detector 23 is h, the distance between the eject button 12 and the upper surface of the movement detector 23 is a, the distance between the deepest part of the notch 21 and the upper surface of the movement detector 23 is b, and The pushing direction distance of the eject button 12 on the slope A of the notch 21 is shown as x (in FIG. 2A, h = a). In this case a, b
The value of is determined within the range of b>c> a with respect to the value c at which the movement detector 23 is turned off when h ≧ c and turned on when h <c, and the pin of the IC card 1 and the fitting portion 9 is determined. When the fitting length of is represented by z, the values of the distances s, t and x between the fulcrums of the arm defined above are set in a range satisfying zt> sx.

FIG. 2B shows the notch 21 and the movement detector 23 when the eject button 12 is pushed in halfway.
And shows the state during attachment / detachment of the IC card 1. At this time, the pressing of the movement detector 23 is released, and both electrodes of the switch are opened.

FIG. 2 (c) shows the relationship between the notch 21 and the movement detector 23 when the eject button 12 is completely pushed. The movement detector 23 is in the pressed state,
Both poles of the switch are shorted. Here, point Q and notch 2
The distance of the end point R of the slope B of 1 is y, and FIGS.
If the distance of the difference in position of the eject button 12 at (i.e., the maximum movement distance of the eject button 12) is u, the value of y is set in a range that satisfies y <u.

Based on the above configuration, the operation principle will be described with reference to FIGS. 1 and 2A, 2B and 2C.

First, let us consider the detachment of the IC card from the fitting portion 9. FIG. 2A shows a state before the IC card 1 is started to be detached, in which the eject button 12 is at the most outwardly protruding position, and the relationship between the notch 21 and the movement detector 23 is shown in FIG. Shown. At this time, the movement detector 23 is in the depressed state, both electrodes of the switch are short-circuited, and the attachment / detachment signal 24 becomes low level. Therefore, the hold pin 2 of the CPU 26
7 also goes low, and the operation of the CPU 26 is not stopped. The data processing device is in a so-called normal operating state.

Then, pushing of the eject button 12 is started. The tip point P of the eject button 12 descends along the slope A, and at the moment when it passes the point h = c, the switch is released and the attachment / detachment signal 24 becomes high level due to the effect of the resistor 25. As a result, the hold pin 27 also becomes high level, and the operation of the CPU 26 is stopped. Since there is a proportional relationship between the movement distance between the eject button 12 and the IC card 1 and the arm length with the fulcrum 18 as the center, the point P descends the slope a according to the above relational expression, zt> sx. Until the end, the fitting of the pins of the IC card 1 and the fitting portion 9 is guaranteed. Conversely, it is after the push-down of the movement detector 23 is released that the pin is uncoupled and noise may be generated, at which time the CPU 26 is already stopped (hence the original purpose). Is achieved). The positional relationship between the notch 21 and the movement detector 23 at this time is shown in FIG.
This is as shown in (b). While the movement of the eject button 12 is an event in the order of milliseconds, the stop of the operation of the CPU 26 is completed in the order of microseconds at most.
It is virtually unnecessary to worry that the pins will be disengaged before U26 is stopped. Here, by further increasing the value of t with respect to s, it is easy to increase the mechanical accuracy of this portion.

In order to move the IC card 1 to the final take-out position, it is necessary to continue pressing the eject button 12 from the state shown in FIG. 2 (b). The point P starts to rise along the slope a, and after h = c, the movement detector 23 is pressed again, the attachment / detachment signal 24 returns to the low level, and the operation of the CPU 26 restarts (a series of separations). The operation is completed, that is, the state when the point P has climbed up the slope B is shown in FIG. 2 (c). The guarantee that the operation will resume is that the spring 2 given by the above-mentioned relational expression, y <u
2 dynamically maintains the position of the point P after the card is taken out.

Up to now, the removal of the IC card 1 has been considered, but next, the mounting will be considered. First, assume that the IC card 1 is not present. At this time, the eject button 12 has the spring 22.
Has settled into a pushed state by trying to become a natural length. By satisfying this assumption, the subsequent mounting can be considered as a temporal reversal operation of disengagement, and the disengagement start timing corresponds to the mounting completion timing. Therefore, the CPU 2 is promptly started after the mounting operation is started.
6 stops, the IC card 1 and the fitting portion 9 are fitted, and the CPU 2
The operation of 6 is restarted. In this way, malfunctions due to noise can be avoided even during mounting.

The above is the description of the present embodiment. Note that the notch of the present invention may be a protrusion, and in this case, since the relationship of pressing and releasing the pressing of the movement detector is reversed, the logic of the attachment / detachment signal may be inverted and given to the CPU. The movement detector may be replaced by an optical switch. This is because the movement can be detected by blocking and passing the light beam by moving the notch.

In this embodiment, the self-stop function of the CPU is used as the processing stopping means of the data processing device.
When the PU does not have this function or has another advantage, the attach / detach signal can be used as the wait signal of the CPU to effectively stop the CPU operation.

[0023]

As described above, the present invention can detect the attachment / detachment of the storage medium from the movement of the eject button and stop the data transfer of the data processing device during the attachment / detachment of the storage medium. Therefore, the present invention provides a solution to the problem of malfunction of the conventional data processing device which has to wait passively for attachment and detachment. Further, by effectively utilizing the mechanical feature of the eject button, it is easy to improve the accuracy of the attachment / detachment detection.

Thus, according to the present invention, a simple structure,
As a circuit, it is possible to eliminate malfunction caused by noise when the storage medium is attached and detached, and improve the reliability of the system.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a mechanism and a circuit of a data processing device according to an embodiment of the present invention.

FIG. 2A is a detailed view showing a state before the IC card of the movement detector of the embodiment is started to be detached. FIG. 2B is a state in which pins of the IC card of the movement detector of the embodiment are released. Detailed view (c) Detailed view showing a state where the removal operation of the IC card of the movement detector of the embodiment is completed

FIG. 3 is a conceptual diagram of data transfer of a conventional data processing device.

FIG. 4 is a conceptual diagram of data transfer of a conventional data processing device that takes measures against noise.

[Explanation of symbols]

 12 eject button 23 movement detector 24 attachment / detachment signal 26 CPU

Claims (3)

[Claims] 1. An eject button interlocking with an operation of inserting / removing a storage medium into / from an electric apparatus main body, a movement detector for detecting an operation of the eject button, and a storage medium removed / inserted from the electric apparatus main body by the movement detector. A data processing device, comprising: a processing stopping means for stopping the processing operation of the data processing device itself during the mounting / detaching of the storage medium on the basis of a mounting / dismounting signal generated upon detection of the start. 2. A data processing apparatus, wherein a self-stop function of a CPU is used as a processing stopping means. 3. A data processing apparatus, characterized in that, as a processing stopping means, a CPU signal is stopped by using a detachment signal as a CPU wait signal.