JPH04205014A - Power unit controller - Google Patents

Abstract

PURPOSE:To attain the interruption of power supply without terminating a computer processing by saving data during the processing and thereafter, outputting a signal to an interruption circuit when a switching circuit is activated. CONSTITUTION:In the case of depressing a starting switch 5 during the processing with a computer 2, an activating circuit 4 sends an ON signal to a power unit 1, interruption generating circuit 6, and status circuit 7. Thus, the interruption signal from the interruption generating circuit 6 and a status signal indicating the status of switch 5 are sent out to computer 2. The computer 2, in the case of receiving the interruption signal, interrupts tentatively a task during processing, and interrupts the interruption signal. Further, the duration of depressing switch 5 is longer than the fixed time, the computer 2 saves a series of data in processing to a memory, and outputs an instruction signal for the interruption of power supply to an interruption circuit 8. Consequently, the power unit 1 interrupts the DC power supply supplied to the computer 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a power supply control device that converts AC power into DC power and supplies the DC power to a computer.

(Prior Art) Conventionally, when power is supplied to a computer such as a workstation, the computer 11 as shown in FIG.
A power supply device 10 equipped with an AC (alternating current) switch 12 is connected to and used. When starting up the computer 11, the AC switch 12 is turned on and external AC power is input to the power supply 10. The power supply device 10 supplies input AC power (for example, AClooV) to the computer 11.
It converts it into the DC power (DC5V) required by the computer 11 and supplies it to the computer 11.

In addition, when shutting off the power to the computer 11,
This is done by disconnecting the C switch 12.

Incidentally, since the AC switch 12 is generally operated manually, when shutting off the power to the computer 11, it is necessary to completely terminate the processing of the computer 11 in advance. If the power is accidentally turned off without completing the processing of the computer 11, there is a risk that the data being processed by the computer 11 may be destroyed.

(Problem to be Solved by the Invention) As described above, in the conventional power supply device, the power to the computer is cut off by turning off the AC switch 12 regardless of the state of the computer. If you turn off the power while the
There was a risk that the data being processed would be destroyed and the process would not be executed correctly when the computer was restarted.

The present invention has been made in order to eliminate such conventional drawbacks, and when it becomes necessary to shut off the power while the computer is processing, the power can be shut off without terminating the computer's processing. The present invention also aims to provide a power supply control device that can safely prevent data destruction.

[Structure of the Invention] (Means for Solving the Problems) A power supply control device of the present invention that achieves the conventional object described above includes a power supply device that converts AC power into DC power and supplies it to a computer, and a switch circuit that generates a signal instructing shutoff; an interrupt generation circuit that outputs an interrupt signal to the computer based on the signal from the switch circuit; a status circuit that notifies the computer of the operating state of the switch circuit; It is characterized by comprising a disconnection circuit that shuts off the power supply device according to an instruction from a computer.

(Function) In the present invention, when the switch of the power supply device is turned on and the switch circuit is turned on, AC (alternating current) power is converted to DC (direct current) power and supplied to the computer. On the other hand, when the switch circuit is turned on while the computer is executing processing, an interrupt signal and a signal indicating the state of the switch circuit are sent to the computer from the interrupt generation circuit and the status circuit. When the computer confirms that the switch circuit is turned on based on the status signal, it saves the data being processed and then outputs a signal to the disconnection circuit. The disconnection circuit that has received the signal from the computer sends a power cutoff instruction signal to the power supply device, and the power is cut off.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a power supply control device according to an embodiment of the present invention.

This power supply control device includes a power supply device 1 that converts AC power into DC power and supplies it to a computer 2, an AC switch 3 that inputs AC power to the power supply 1, and a signal that instructs power on and off. an interrupt generation circuit 6 that outputs an interrupt signal to the computer 2 based on a signal from the startup circuit 4; and a status circuit 7 that notifies the computer 2 of the operating state of the startup circuit 4. , and a disconnection circuit 8 that outputs a signal to shut off the power supply 1 according to an instruction from the computer 2.

Next, the operation of the power supply control device configured as described above will be explained according to the flowcharts shown in FIGS. 2(A) and 2(B).

First, the case of supplying power to computer 2 is shown in Figure 2 (
This is explained by A).

When the AC switch 3 is turned on (step S1), AC power is input to the power supply device 1, and the power supply device 1 waits for an ON signal from the startup circuit 4 (step S2).

In this state, by pressing and turning on the starting switch 5, the starting circuit 4 outputs an ON signal to the power supply device 1. When the power supply device 1 receives the ON signal, it converts the AC power into DC power and starts supplying the DC power to the computer 2, the interrupt generation circuit 6, the status circuit 7, and the disconnection circuit 8 (step S3). .

Generally, it takes several seconds or more for the computer 2 to start up after the power is turned on. If you stop pressing the start switch 5 within that time, the output of the start circuit 4 will turn OFF, or the interrupt generation circuit 6 and status circuit 7 that were sent to the computer 2 at this time will be turned off because the computer 2 has not started up. It is determined in advance that the signal will be ignored.

On the other hand, the power supply device 1 that received the ON signal sent from the startup circuit 4 continues to supply DC power even after this ON signal changes to OFF (the state in which the startup switch 5 is no longer pressed). To continue, insert the above O inside the power bag f&1.
It is assumed that a circuit is provided to hold the N signal.

Through the above operations, DC power is supplied, and the computer 2 executes various processes.

Next, the case where the power supply to the computer 2 is cut off will be explained with reference to FIG. 2(B).

When the startup switch 5 is pressed during processing by the computer 2 (step S1), the startup circuit 4 sends an ON signal to the power supply device 1, the interrupt generation circuit 6, and the status circuit 7. As a result, the interrupt generation circuit 6 and the status circuit 7 respectively send an interrupt signal and a status signal indicating the state of the start switch 5 to the computer 2 (step S2).

When the computer 2 receives the interrupt signal, it temporarily suspends the work being processed and identifies the interrupt signal (step S3). Further, the computer 2 determines from the status signal whether the start switch 5 has been pressed for a certain period of time or more (step S4). If the pressing time of the start switch 5 is shorter than a certain period of time, it is determined that the operation has been erroneous, the reception of the signal is ignored, and the interrupted process is restarted (step S5).

If the pressing time of the start switch 5 is longer than a certain period of time,
The computer 2 saves the series of data being processed to a storage device such as a magnetic disk (step S6), and disconnects the circuit 8.
An instruction signal to turn off the power is output to (step S7).

As a result, an OFF signal is sent from the disconnection circuit 8 to the power supply device 1, and the power supply device 1, which has received the OFF signal, cuts off the DC power supplied to the computer 2 (step S8).

The power supply control device of this embodiment is configured as described above,
Moreover, since the computer 2 operates, the power can be turned off even when the computer 2 is processing without performing an operation to end the processing. Further, since the processing data of the computer 2 is saved before the power is shut off, there is no fear of data destruction.

[Effects of the Invention] As explained above, according to the power supply control device of the present invention, when it becomes necessary to shut off the power during computer processing, the power can be shut off without operating the computer to complete the processing. I can do it. Furthermore, since the data being processed is saved when the power is turned off, it is possible to safely prevent the data from being destroyed, and it is possible to prevent the processing from not being executed correctly when the computer is restarted.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a power supply control device according to an embodiment of the present invention, FIGS. 2A and 2B are flowcharts explaining the operation of the power supply control device according to the embodiment, and FIG.
The figure is a block diagram showing the configuration of a conventional power supply device. 1...Power supply device, 2...Computer, 3...A
C switch, 4... Start circuit, 5... Start switch, 6... Interrupt generation circuit, 7... Status circuit,
8...Circuit break. Applicant Toshiba Corporation Patent Attorney Sasa Suyama - Figure 1

Claims (1)

[Claims] A power supply device that converts AC power into DC power and supplies it to the computer, a switch circuit that generates a signal to instruct power on and off, and an interrupt that outputs an interrupt signal to the computer based on the signal from the switch circuit. A power supply control device comprising: a generation circuit; a status circuit that notifies the computer of the operating state of the switch circuit; and a disconnection circuit that shuts off the power supply according to an instruction from the computer.