JPH0738145B2 - Electronics - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electronic device including a main body and peripheral devices that are detachably connected by a connection cable, and more particularly, to an electronic device having an initialization function.

[Prior Art] Conventionally, in an electronic device that needs to be initialized, a runaway has occurred due to a bug in a program or the like while the electronic device is operating, in addition to a method of using a reset signal for initialization at power-on A forcible reset key is provided for occasional processing, and by operating this key, a reset signal is generated to perform initialization. However, pressing this reset key forcibly starts the initialization, so in order to prevent malfunction, the key is covered with a cover,
It was necessary to give consideration to the small keys when it was difficult to operate. Therefore, there are drawbacks such as design restrictions and cost increase.

[Purpose] The present invention has been made in view of the above-described drawbacks of the prior art, and an object thereof is to insert / remove the peripheral device in an electronic device including a main body and peripheral devices that are detachably connected by a connection cable. By making the main body resettable by means of the above, there is provided an electronic device that does not require a key for special initialization.

Embodiments Embodiments to which the present invention is applied will be described in detail below with reference to the drawings.

FIG. 1 is an external view of the embodiment. In the figure, reference numeral 1 is a main body, 2 is a keyboard, and the main body 1 has a built-in control circuit for controlling the operation of the entire apparatus, and performs various operations such as character information processing, numerical operation, and interface with peripheral devices. The keyboard 2 has a function of detecting that a key group 21 on the keyboard is pressed, generating A information, and transmitting the key information to the main body 1. Reference numeral 11 denotes a power switch, and when the switch is turned on, the power source built in the main body 1 starts to operate, and also has a function of supplying electricity to each part of the main body 1 and the keyboard 2. Reference numeral 12 denotes a keyboard connector portion, which is a portion to which an interface cable connecting the main body 1 and the keyboard 2 is connected, and can be disconnected. In addition, the reset signal generating circuit 6 is provided in the keyboard 2.
There is a keyboard control circuit 5 with a built-in keyboard 2 (Fig. 2) and a body control circuit 3 with a built-in body 1 (Fig. 2).
Has a function of generating a reset signal for resetting the.

FIG. 2 is a block diagram for explaining the reset signal generating circuit built in the keyboard 2 and the connection with the main body 1.

In the figure, 3 is a main body control circuit, which has a function of controlling the entire device. Reference numeral 4 denotes a power source, which is built in the main body 1 and has a function of transmitting electricity to each part.
Electricity is also supplied to the keyboard 2 via 12. Reference numeral 5 denotes a keyboard control circuit, which has a function of detecting a press of the key group 21 to generate a key code and transmitting the key code to the main body control circuit 3 via the keyboard connector 12.

FIG. 3 shows an example of the reset signal generation circuit 6. Body 1
By charging the capacitor 13 with the DC voltage + V supplied from, the signal RESET / (/ indicates negative logic) for a fixed time determined by the time constants of the capacitor 13 and the resistor 14 is set to "0". Is sent to the keyboard control circuit 5 to initialize the keyboard control circuit 5, and is also sent to the main body control circuit 3 via the keyboard connector portion 12 to initialize the main body control circuit 3. The reset signal generation circuit 6 is connected to the keyboard connector 12 and normally operates when the power switch 11 of the main body 1 is turned on and electricity is supplied from the power source 4, but the power switch is turned on. After that, the keyboard connector 12 is removed /
Electricity will be supplied from the main body 1 even when it is plugged in, and the reset signal generation circuit 6 operates again in the same manner as when the power switch 11 is turned on, and the signal RESET / is sent to each part, and the main body 1
It also has the function of re-initializing the keyboard 2.

Next, the reset operation in the above configuration will be described.

First, the power switch 11 is turned on, the power supply 4 is operated, electricity is supplied to each part in the main body 1 such as the main body control circuit 3, and the keyboard control circuit 5 and the reset signal generation circuit 6 in the keyboard 2 are also supplied. Electricity is supplied. At this time, the reset signal generation circuit 6 generates the signal RESET /.
This signal is sent to the keyboard control circuit 5 to initialize the keyboard 2. Keyboard connector 12
It is also sent to the main body control circuit 3 via the, so that the main body control circuit 3 is initialized. As described above, when the power is turned on, the entire device is reset by the operation of the reset signal generation circuit 6, the initialization routine operates on the program, and predetermined information is set. It is possible to enter into the corresponding action. Next, when the device is out of control due to a program bug or the like during the execution of the program, and when forced initialization is required, the keyboard 2 is removed once from the keyboard connector 12 and reinserted, as if to the reset signal generation circuit 6. When the reset signal generation circuit 6 is activated and the keyboard control circuit 5 and the main body control circuit 3 are initialized by the same state as when the electricity is supplied, the runaway state can be recovered.

According to the embodiment with the above configuration, the device can be initialized by the signal RESET / by the insertion / removal operation of the keyboard connector, so that it is not necessary to provide a reset key on the main body or the keyboard as in the past, and the design is comfortable. Not only can the shape be achieved, but the structural load is also reduced, which has the effect of reducing costs.

Although the above description has been given by taking the keyboard 2 and the main body 1 for inputting a key code from the keyboard as an example, the present invention can be easily applied to any electronic device as long as it requires initialization. You will understand.

As described above, the electronic device including the main body and the peripheral device detachably connected by the connection cable of the present invention includes a detection unit that detects a change in the connection state of the connection cable and a detection result of the detection unit. And an initialization means for executing initialization of the main body by the initialization signal generated by the signal generation means.

That is, by, for example, pulling out, plugging in, or pulling out the connection cable from the main body, the detection means becomes a place to detect a change in the connection state of the connection cable, and the signal generation means responds to this detection. Then, an initialization signal that triggers the initialization of the main body is generated. Therefore, the present invention has a specific effect that a special key for initialization, a switch, or the like can be eliminated. Since it is possible to eliminate the need for special keys, switches, etc., for example, the restrictions on the design of the electronic device are released, and the cost of parts is reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of an electronic device according to an embodiment of the present invention, FIG. 2 is a block diagram showing a main part of the electronic device according to the embodiment, and FIG. 3 is an example of a reset signal generation circuit 6. It is a circuit diagram of. In the figure, 1 ... Main body, 2 ... Keyboard, 3 ... Main body control circuit, 4 ... Power supply, 5 ... Keyboard control circuit, 6 ...
Reset signal generation circuit, 11 ... Power switch, 12 ... Keyboard connector, 13 ... Capacitor, 14 ... Resistance,
21 …… Key group.

Claims (1)

[Claims] 1. An electronic device comprising a main body and peripheral devices that are detachably connected by a connection cable, a detection means for detecting a change in a connection state of the connection cable, and an initial device according to a detection result of the detection means. An electronic device comprising: a signal generation unit that generates a signal for initialization; and an initialization unit that executes initialization of the main body by the initialization signal generated by the signal generation unit.