JPH0253125A - Malfunction preventing method at connection/ disconnection of hot line of electronic equipment - Google Patents

Abstract

PURPOSE:To surely prevent the data errors and malfunctions due to the noises, etc., caused when a connector is attached and detached by using a means which stops the working of an electronic equipment under operation when a signal contact is connected. CONSTITUTION:A plug P and plug socket C are connected at the side of a 1st connection/disconnection contact X with the P or the C kept oblique. Thus the voltage of a low level is supplied to a 1st input terminal of an EOR circuit 16 together with the voltage of a high level supplied to a 2nd input terminal respectively. Then a signal W is outputted from the circuit 16. As a result, a CPU 11 of an electric equipment A sets this equipment A in a waiting state. Thus a signal contact Z is connected after the working equipment A is stopped. Finally the 2nd input terminal of the circuit 16 is set at a high level when a 2nd connection/disconnection contact Y is connected. Then the waiting state of the CPU 11 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a connector for signal connection provided in an electronic device such as an electronic device or an electronic cash register. When connecting or disconnecting a circuit board or external equipment, etc., when hot-swapping a connector cover,
The present invention relates to a method for preventing malfunctions during hot insertion and removal of electronic devices to prevent malfunctions in signals and data existing in the electronic devices to be connected.

[Conventional technology]

In this way, in electronic devices that are connected to and separated from external electronic devices or structures with electronic circuits such as circuit boards through connectors, a central processing A device (CPU), various types of memories, etc. are provided via path lines.

In such electronic devices, as long as the power is on, various memories, CPUs, etc. perform processing operations such as calculations. Therefore, signals such as data and commands are always present on the path lines that connect various memories, CPUs, etc. that perform these processing operations.

In this way, when connecting or disconnecting with other structures while a signal is present on the path line,
It is necessary to connect the pass lines to each other, and conventionally connectors have been used in such cases.

[Problem to be solved by the invention]

However, as mentioned above, when connecting and disconnecting devices using connectors, there are many signals on the path lines of the connected and disconnected devices. Noise is generated by the shock when the structure connects and disconnects from the connector, and this noise adversely affects the signal on the path line, causing incorrect data on the connected and disconnected equipment during operation, and also causing malfunctions. There was a problem.

In order to prevent this malfunction during contact/disconnection, it is sufficient to turn off the power to the electronic equipment, but it is extremely troublesome and difficult to switch the power supply every time a contact/disconnection is performed. Not only that, but if the operator forgets, similar problems will occur as a result.

It is also possible to lengthen or shorten the pin contacts and socket contacts of the connector used for this connection and disconnection, and form them into a connector with a special structure. However, there is a problem in that the connector itself becomes expensive, which in turn makes the entire device expensive.

Therefore, the present invention has been made to solve the above-mentioned problems, and it is necessary to turn off the power on the side of the device to be connected and separated each time the device is connected and separated.
Even if it is in the ON state without switching to It is an object of the present invention to provide an excellent method for preventing malfunctions during hot insertion and removal of electronic equipment, which does not cause data errors or malfunctions.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention connects a structure having an electronic circuit to an electronic device in operation via a connector having a plurality of signal contacts for connection. A method for preventing malfunction during hot insertion and removal of electronic equipment when electrically connecting or disconnecting, the method comprising: contacts at both ends of a plurality of signal contacts of a connector provided on both the electronic equipment side and the structure side. are connected to the two input terminals of the EOR circuit, and the output terminal of the EOR circuit is connected to the CPU of the electronic device.

Then, the connector on the structure side is inserted into and removed from the connector on the electronic equipment side at an angle so that the connection and separation are performed from one of the contacts provided at both ends of the connector. Then, connect and disconnect one of the contacts of each connector, and input different inputs to the EOR circuit from the input terminal from the connected and disconnected contact, and output the output signal from the EOR circuit to the electronic device in operation. Output to the CPU to temporarily stop the operation of the electronic device.

While this operation is stopped, the signal contact in the center is connected and separated, and then the other contact is connected and separated, and an input equivalent to that of the one connection and separation contact is input to the EOR circuit. It is designed to stop the output signal to the electronic device and restart the operation of the electronic device.

[For production]

According to the method described above, when the electronic device on the side to be connected and separated and the structure on the side to be connected and separated are separated, at least the input terminal of the EOR circuit provided in the electronic device on the side to be connected and separated is Since equal inputs are being made, no output signal is output and the electronic device is in operation.

In this state, when the connecting and disconnecting contacts provided at both ends of each connector are connected and disconnected from one side, a different input is made to one input terminal of the EOR circuit, and the EOR circuit sends an output signal to the CPU of the electronic device. Output.

As a result, the operation of the electronic device is stopped by the CPU, and the signal contacts are connected and separated in this stopped state.

After the signal contact is connected and disconnected, when the other connection and disconnection contact is finally connected and disconnected, the same input as the one input terminal is applied to the other terminal of the EOR circuit, and this causes the input to the re-input terminal. become equal, and the output signal from the EOR circuit to the CPU of the electronic device is stopped.

Therefore, the electronic device is released from the stopped state and restarts its processing operation.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a structural diagram of a connector used in this embodiment.

First, the structure of the connector used in this embodiment will be explained with reference to FIG. 2. In the figure, A indicates the plug P side of the connector, and the opening indicates the outlet C side to which the plug P can be connected.

1 is the base of the plug P, and 2 is the base of the outlet C, which are made of an insulating material.

X is the first connection/disconnection contact provided on this plug P and outlet C, and one end of the base 1 of the plug P has two
Book first pin contact 3 (3a.

3b) is established, and on the base 2 of the other outlet C,
The corresponding first socket contact 4 (4a,
4b) is provided.

Y is a second contact, and two second pin contacts 5 are established on the other end side of the base 1 of the plug P.
(5a, 5b) and this second pin contact 5 (
5a, 5b), the other end of the base 2 of the outlet C,
A second socket contact 6 (6a,
6b).

Further, Z is a signal contact for transmitting and receiving signals such as information and commands, and is the first pin contact 3 (
3a, 3b) and second pin contact 5 (5a, 5b)
), and a signal socket contact 8 is provided on the side of the base 2 corresponding to the signal pin contact 7.

These above-mentioned pin contacts 3, 5 and 7 are connected to the base 1.
Also on the same side of the socket contacts 4, 6 and 8
are provided in alignment on the same side of the base 2, and the length i! of each pin contact 3.5 and 7 is provided. 1 are all the same length, and each socket contact 4, 6
The lengths 12 of 8 and 8 are all the same length.

For this reason, when connecting or disconnecting the plug P and the outlet C, one of them, that is, the plug P or the outlet C, should be placed with the contact surfaces on which the contacts are formed facing each other. By tilting the contacts diagonally to the contact/detachment surface side of the other party and making contact/detachment sequentially from one side of the multiple contacts in line, the center signal contact Z is always connected to both ends before and after the contact/detachment. The provided first and second contact contacts X, Y are adapted to be brought into contact and separated.

Further, 9 and 10 are lead wires that are connected to the contacts of the bases 1 and 2, respectively, and extend from the opposite side of the bases 1 and 2 where the contacts are provided, and are used for electronic equipment, etc. It is connected to the internal pass line etc.

In FIG. 2, there are two contacts X and Y for contact and separation, but the number is not limited to this, and the number may be increased or decreased as necessary.

Next, the connector consisting of the above-mentioned plug P and outlet C is attached to the electronic device A on the connected/separated side and the structure such as the electronic device or circuit board on the connected/separated side.
1 is a block diagram showing a method for preventing malfunction during hot insertion and removal of the connector when the connector is in operation.
This will be explained using figures.

In the following description, it is assumed that the structure B on the approaching and separating side does not have a central processing unit (CPU).

Further, the symbols relating to the connectors are the same as those shown in FIG.

In FIG. 1, 11 is a CPU, 12 is a program memory, 13 is a data memory, 14 is an input/output interface, and 15 is a pass line.
All of them are provided in the electronic device A and the structure B, except for the structure B.

Reference numeral 16 denotes an EOR circuit (exclusive OR circuit), the output terminal W of which is connected to the CPU II of the electronic device A on the side to be connected and separated. Of the two input terminals, the first input terminal is connected to one 3a of the first pin contacts 3 of the plug P, and the second input terminal is connected to one of the first pin contacts 5 of the plug P. It is connected to one of them, 58.

Note that the first input terminal and the second input terminal of the EOR circuit 16 are connected to a power supply terminal held at a high level via pull-up resistors R1 and R2. The other 3b of the first bottle contacts 3 and the other 5b of the second bottle contacts 5 are grounded, and the central signal contact 7 is connected to the electronic device A via the lead wire 9. It is connected to the pass line 15.

Then, the EOR circuit 16 outputs an output from its output terminal W to the CPUI 1 of the electronic device A, thereby forewarning that there will be contact with and separation from another structure B, and based on this notice, the CPUI The processing operation of device A is maintained in a "standby" state, and at the same time, the ERM 17 notifies the operator that it has been brought into contact with or separated from the device.

Also, the first outlet of outlet C. The second socket contacts 4 and 6 are both grounded, and like the plug P, the central signal socket contact 8 is connected to the pass line 1.5 of the structure B via a lead wire 10. has been done.

The contact and separation operations between the electronic device A and the structure B configured in this manner will be explained using FIG. 3 in addition to FIG. 1.

FIG. 3 is a time chart showing the contact/separation operation of this embodiment, where (A) shows the case where the connection is made from the first contact/separation contact side, and (B) shows the case where the connection is made from the second contact/separation contact side. In this case, (1) indicates the case where the contact is released from the first contact/separation contact side, and (1) indicates the case where the contact is released from the second contact/separation contact side. The contact/separation state of the contact, ra) is the contact/separation state of the second contact/separation contact, (
C) shows the contact/separation state of the signal contact, (a) shows the presence or absence of an output signal from the EOR circuit, and (e) shows the operating state of the electronic device A on the contact/separation side.

First, when the plug P and the outlet C are disconnected from each other as shown in FIG. 1, the first input terminal of the EOR circuit 16 is at a high level, and the second input terminal is also at a high level. Voltage is input and EOR circuit 1
No output signal is output from 6, so the electrical equipment A is in operation.

In this state, if the plug P and the outlet C are connected from the first contact X side with one side tilted as shown in FIG. 1 contact X is connected first,
As a result, a low-level voltage is input to the first input terminal of the EOR circuit 16, and a high-level voltage is input to the second input terminal, so that the signal from the output terminal W of the EOR circuit 16 is electronic. Device A CPUI 1<Output.

As a result, electrical equipment A enters the "standby" state according to a command from the CPU II, stops its processing operation, and at the same time informs the operator that another structure B is currently connected.
Notify by RM17.

At time t2 after electronic device A, which has been operating in this manner, stops operating, signal contact Z is connected.

Finally, when the second contact Y of the other end is connected at time t3, the voltage input to the second input terminal of the EOR circuit 16 changes from a high level to a low level. The inputs of the input terminals become equal, and therefore, no signal is output from the output terminal W from the EOR circuit 16 to the CPU II of the electronic device A.

Therefore, the CPU II cancels the "standby" state of the electronic device A, restarts its processing operation, and at the same time notifies the operator through the ERM 17 that the connection has been terminated.

Next, referring to FIG. 3A, the case where connection is made from the second contact y side will be explained. At time L4, the second contact Y is first connected, and as a result, the EOR circuit 16
A high level voltage is input to the first input terminal of the , and a low level voltage is input to the second input terminal, so
The signal from the output terminal W of the EOR circuit 16 is transmitted to the electronic device A.
is output to the CPU 11 of.

As a result, the electric device A is connected to the first connection/detachment contact X.
Just like when connected from the side, it will be in a "standby" state,
At the same time as stopping the processing operation, the ERM 17 notifies the operator that another structure B is being connected.

Then, at time t5 after the electronic device A that was in operation has stopped its operation, the signal contact Z is connected, and finally, at time L6, the first contact X on the other end side is connected. Then, the voltage input to the first input terminal of the EOR circuit 16 changes from high level to low level and becomes equal input voltage, so the output from the output terminal W of the EOR circuit 16 to the electronic machine Masato CPUI 1. stops.

As a result, the CPU II releases the "standby" state of the electronic device A, restarts its processing operation, and at the same time notifies the operator through the ERM 17 that the connection has been terminated.

Next, the operating state when disconnecting from the connected state will be explained.

As described above, when the plug P and the outlet C are connected, the voltages input to the first input terminal and the second input terminal of the EOR circuit 16 are both at a low level. Therefore, the EOR circuit 16. There is no output from the output terminal W of the electronic device A, so the electronic device A is in operation.

In this state, by tilting either the plug P or the outlet C and pulling it out from the other, as shown in FIG. is released.

As a result, a high level voltage is input to the first input terminal of the EOR circuit 16, and a low level voltage is input to the second input terminal, so the input voltage at the re-input terminal is different, and therefore the EOR A signal is output from the output terminal W of the circuit 16 to the CPUI 1 of the electronic device A.

As a result, as in the case of the above connection, the electronic device A is “
The processing operation is stopped, and at the same time, an ER is sent to inform the operator that another structure B is being opened.
Notify by M17.

Thereafter, the signal contact Z is opened at time t8 while the operation of the electronic device A that was in operation is stopped.

Finally, when the second contact Y is opened at time L9, the voltage input to the second input terminal of the EOR circuit 16 changes from a low level to a high level. As a result, the two input terminals of the EOR circuit 16 have the same input voltage, and therefore the output terminal W of the EOR circuit 16
, the signal to CPUI 1 of electronic device A disappears.

As a result, the "standby" state according to the command from the CPU II is released, and the electronic device A resumes its processing operation, and at the same time notifies the operator through 'E RM17 that the separation has been completed.

(1) in the figure shows a state in which the second contact Y is opened and separated, and according to this, when the second contact Y is opened and separated at time t10, as a result,
A low-level voltage is directly input to the first input terminal of the EOR circuit 16, and a high-level voltage is manually applied to the second input terminal by opening the circuit.

Therefore, the input voltages of both input terminals are different, and a signal is output from the output terminal W of the EOR circuit 16 to the electronic machine Masato CPU1l.

As a result, similar to the connection described above, the electronic device A
goes into a "standby" state and stops processing operations according to a command from CPU 1, and at the same time prompts the operator to create another structure B.
The ERM 17 notifies that the device is being opened.

After this, the signal contact Z of the electronic device A, which was in operation, is turned off at time tll while its operation is stopped.
Perform the separation.

Finally, when the first contact X is opened at time t12, the voltage input to the first input terminal of the EOR circuit 16 changes from a low level to a high level. Therefore, the two input terminals of the EOR circuit 16 become equal inputs, and the signal from the output terminal W to the CPU II of the electronic device A is stopped.

As a result, the "standby" state according to the command from the CPU II is released, and the electronic device A resumes its processing operation, and at the same time notifies the operator through the ERM 17 that the separation has been completed.

In the above-mentioned embodiment, the CPU II is provided only in the electronic device A on the contact/separation side, and the CPU 1 is not provided on the structure B on the contact/separation side. However, the plug P of the connector and the outlet C, increasing the number of the first contact X and the second contact Y,
If the CPU II is also provided in the structure B on the approach/separate side, it becomes possible to perform the approach/separation while both are in operation.

[Effects of the Invention] As explained above, according to the present invention, both ends of a plurality of signal contacts of a connector provided on both an electronic device in operation and another structure to be connected are The contact is a contact/detachment contact, and at least the contact/detachment contact of the connector on the side of the electronic device is connected to two input terminals of the E and OR circuit, and the output terminal of the EOR circuit is connected to the CPU of the electronic device.

By tilting both connectors diagonally and inserting/unplugging them, one of the contacts is first connected/disconnected to provide different inputs to the EOR circuit, and the output signal from this EOR circuit controls the operation of the electronic device. Once the operation is stopped, the signal contact in the center is connected and disconnected, and the other contact is connected and disconnected to stop the output signal of the EOR circuit and control the operation of the electronic device again. It was designed so that

In this way, the electronic device that was in operation when the signal contact was connected will stop operating without turning off the power, so there will be no signal on the path line of the electronic device, and therefore This eliminates the shock caused when the connector of the structure connects and disconnects. As a result, there is no adverse effect from noise caused by shock, and data errors and malfunctions can be reliably prevented.

Furthermore, conventionally, in order to avoid shock during contact and separation,
I turned off the power to electronic equipment every time I connected or separated, but
According to the present invention, since the operation is automatically stopped when approaching and separating, there is no need to perform troublesome switching operations, and troubles caused by forgetting the operator are prevented. The operation has become extremely simple.

In addition, there is no need to use a special connector with longer or shorter contacts, and it is sufficient to connect and disconnect by tilting a normal connector, so the price does not increase.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a structural diagram of a connector used in this embodiment, and FIG. 3 is a time chart showing the operating state of this embodiment. A...Electronic device B...Structure X...First contact/separation contact Y...Second contact/separation contact Z...Signal contact 11...CPU 15...Pass line 16 ...EOR circuit

Claims (1)

[Claims] 1. A method for electrically connecting or disconnecting a structure having an electronic circuit to an operating electronic device via a connector having a plurality of signal contacts for connection. A method for preventing malfunction during hot insertion and removal, the contacts at both ends of the plurality of signal contacts of the connector provided on both the electronic device side and the structure side being used as disconnection contacts, at least for the connector on the electronic device side. Connect the disconnection contacts to the two input terminals of the EOR circuit, and connect the output terminal of this EOR circuit to the CPU of the electronic device, and connect the connector on the structure side to the connector on the electronic device side.
By inserting and removing the connector at an angle so that the connection and separation are performed from one of the contacts provided at both ends of the connector, first the connection and separation contacts of one of the connectors are connected and separated, and this connection and separation is performed. Different inputs are made to the EOR circuit through the input terminal from one of the connected/disconnected contacts, and the EO
The CPU of the electronic device that is operating the signal output from the R circuit
output to temporarily stop the operation of the electronic device, connect and disconnect the central signal contact while the operation is stopped, and then connect and disconnect the other contact, which is equivalent to the one connection and disconnection contact. A method for preventing malfunction during hot insertion and removal of an electronic device, characterized in that by inputting an input to an EOR circuit, an output signal to a CPU is stopped and the operation of the electronic device is restarted.