JPS63286918A - Power supply system for information processor - Google Patents

Abstract

PURPOSE:To make a device low in power consumption, and to prevent the device from sudden system-down and the fatal loss of data by providing a means to detect the power capacity of a power source, and a priority order supplying means, and the means to store the supplying state of a power. CONSTITUTION:At the time of applying the power supply to the device, the CPU 6 of an information processing device 200 detects the power capacity of a common power source circuit 101 through a power capacity detecting part 300. Next, it the power is supplied in stepwise to peripheral devices by controlling a switch circuit network 103 on the basis of this detection information in referring to the priority order of the peripheral devices (a floppy disk drive 7, a hard disk drive 8, a printer 9, a serial part 10), shown by the priority order supplying part 400. Then, this supplying state of the power is stored in a connection state storage part 500. Thus, the power can be supplied only to the drivable peripheral device, and at the same time, the connection order of the peripheral devices can be changed according to application, by changing the priority order.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to information processing devices such as personal combinators and word processors, and in particular to reducing power consumption and preventing sudden system down of battery-powered devices. The present invention relates to a power supply system suitable for.

[Conventional technology]

In recent years, information processing devices such as burners and word processors have become smaller year by year due to the development of integrated circuit technology. In addition, the power consumption of information processing devices has been rapidly decreasing due to their miniaturization and the shift to CMOa integrated circuits, and in the past few years, information processing devices that can be sufficiently powered by batteries such as Nizukel cadmium batteries have become increasingly popular. It is appearing. However, floppy disk drives among external storage devices still require about 2 W even if they have low power consumption, which has been a major factor in shortening the battery operating time of the information processing device. In order to reduce this power consumption, a power saving technique disclosed in Japanese Unexamined Patent Publication No. 61-52722 is known. The main points of this technology will be explained using one drawing. FIG. 7 is a diagram illustrating this power saving technique in a simple manner.In the information processing device 1, there is a keyboard section 2 for inputting data. Display unit for displaying various data 5. The basic configuration includes a memory unit 4 that stores programs and data, and a central processing unit (hereinafter abbreviated as CPU) 6 that controls these through a bus 5. In addition to these, a floppy disk drive (FD
D)7. Hard disk drive (11DD)8. Printer9. It is composed of peripheral devices such as a serial section 10 that communicates with the outside.

The feature of this technology is the part described below.
through the switch network 105! The source is Flotavi disk drive 7, hard disk drive 8. Printer9. It is supplied to the serial section 10.

The state of the switches in switch network 105 is determined by the output state of power control port 102 . With the above configuration, instructions can be given from the CPU 6 to the power control board 102 in accordance with user commands or operating system commands, and power supply to unnecessary devices can be interrupted, thereby making it possible to effectively utilize power.

[Inventive power 5: Problems to be solved] However, the above-mentioned conventional technology does not take into account the amount of power of the power source, and has the following problems. That is, according to the discharge characteristics shown in FIG. 8, for example, the floppy disk drive 7, the hard disk drive 8, of the information processing apparatus 1 shown in FIG. Printer9.
When the serial part 10-KWL power is not supplied, the power supply voltage decreases as shown by a curve 110 in FIG. If Vo is the minimum operating voltage of the information processing device 1, it can operate for up to 10 hours from the intersection with the curve 110. Here time A
Suppose that power is supplied to the floppy disk drive 7 due to the need for software in ! The voltage drops rapidly as shown by curve 111, and reaches the lowest operating voltage vO in time T1. If a write operation was performed on the floppy disk during this time T1, the data would naturally not be written properly, resulting in fatal data loss.

It invites.

The purpose of the present invention is to reduce the power consumption of an information processing device in order to compensate for the drawbacks of the prior art, prevent sudden system failure of the device, and appropriately prevent fatal data loss in the worst case. An object of the present invention is to provide a power supply method for an information processing device that prevents this from occurring.

[Means for solving problems]

The above objects are as stated in the prior art (9) to provide a means for detecting the power capacity of a power supply in an information processing apparatus, a means for supplying priorities to peripheral devices such as floppy disks and hard disks, and a means for providing priority orders for peripheral devices such as floppy disks and hard disks; This is achieved by providing means for storing connection status.

[Operation] The power capacity detection means detects the power capacity of the power supply when the information processing device is powered on, and based on this detection information, supplies power to peripheral devices in the order indicated by the peripheral device priority supply means. And, this power supply status is stored in the peripheral device connection status storage means. Through these operations, power can be supplied only to peripheral devices that can be driven in accordance with the power capacity, and the priority order of the peripheral devices can also be changed by changing the contents of the peripheral device priority supply means. The connection order of peripheral devices can be changed depending on the application running on the information processing device. Furthermore, whether or not these peripheral devices can be driven can be determined by simply referring to the peripheral device connection status storage means, so there is no need to take the trouble to test the peripheral devices.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a block diagram of an information processing device 200 as an embodiment of the present invention, in which CPU6. Keyboard 2. Display 3. Memory 4s flow 9-speed disk drive 7. Hard disk drive8. Printer9. Serial part 10. Switch network 103. Power control boat 102. Common power supply circuit 101. The bus 5 has the same functions as the PROTAF with the same reference numeral described in the prior art. The features of this embodiment include: a power capacity detection section 3001 as a power capacity detection means for detecting the power capacity of the common power supply circuit 101; a priority supply section 4001 as a peripheral device priority supply means; and a peripheral device connection status storage means. The point is that a connection status storage unit 500 is provided. These operations will be explained while showing specific examples of each.

FIG. 2 shows a specific example of the power capacity detection section 600, which operates as a kind of analog/digital conversion circuit that outputs the voltage of the common power supply circuit 101 to the bus 5 as a digital value. 507, 308, 309, and 310 are operational amplifiers, and when a voltage of 1 or more is applied to the positive (+) terminal, the operational amplifier outputs a value of 11' at the digital level. However, if a voltage lower than that is applied, a value of / is output at a digital level. Reference numeral 301 denotes a power source serving as a reference voltage, which is different from the power source that supplies power to the information processing device 200. The voltage of the power supply 501 is applied to the resistors 302, 303, 3
04 and 305.

Those voltages are operational amplifiers 507, 508, 509
, 510, respectively, are applied to the negative ←) terminals.

- As an example, if the voltage of the reference power supply 301 is 9V, the resistor '30
The resistance values of 2, 305, and 304 are respectively 10KΩ,
If the resistance value of the resistor 305 is 60Ω, the operational amplifier 30
7° 308, 509, 310 minus (9V, av, 7V, 6V are applied to the → terminals, respectively. Also,
If the output of the operational amplifier 310 is connected to the lowest bit of the bus 5, and then connected in order to the output of the operational amplifier 307, the bus 5 is converted into a binary number (0000).

(0001), (0011), (0111), (111
1) Five types of data are output. Each value is 1
When converted to decimal number, (o), (1), (3)
, (c) (15), and the relationship between this output value and the voltage of the common power supply circuit 101 is the graph shown in FIG. 5.Therefore, the CPU 6 shown in FIG.
1 voltage, ie, power capacity, can be detected through the power capacity detection unit 300.

In this specific example, the explanation was given using four operational amplifiers, but if there are more than four operational amplifiers, the voltage can be detected more precisely.Also, by selecting the resistance value, any voltage value can be detected, and this voltage value can be The power capacity can be accurately detected by matching the discharge characteristics of the power supply of the information processing device.

FIG. 4 is an explanatory diagram of a table showing a specific example of the priority supply unit 400. For example, when the output value of the power capacity detection unit 300 is (1), only the serial unit 10 is If so, information is provided to the CPU 6 to connect the serial section 10, printer 9, and floppy disk drive (F'DD) 7.Based on this information, the CPU 6 controls the power control board 102 and switches only the necessary peripheral devices. Power is supplied through the circuit network 105, and the connection status is stored as shown in a specific example of the connection status storage means 500 shown in FIG. 5.The example shown in FIG.
．． In this example, power is supplied to the disk drive (FDD) 7, and since power is not supplied to the node disk (HDD) 8, information indicating that it is not connected is stored.

In this embodiment, the serial section 10 is given the highest priority as shown in FIG. 4, but depending on the software, it is naturally possible to give a high priority to the floppy disk (FDL) 7.

In that case, as shown in FIG.
This can be easily achieved by changing the contents of .

Furthermore, even if changes are to be made, a plurality of tables for the priority order supply section 400 are prepared, and one of the plurality of tables is selected by a program or a user, thereby providing a connection order according to the situation. Further, since the priority order supply section 400 and the connection status storage section 500 can be configured as a table representing information due to their nature, they can be provided in the existing memory 4 of the information processing device 200.

In that case, the only cost increase in implementing the present invention is the power capacity detection section 300.

Furthermore, in this embodiment, the power was controlled using the peripheral devices such as the floppy disk, hard disk, printer, and serial unit, but there are also other devices such as an expansion memory, a magnetic tape recorder, and a keyboard.

It goes without saying that the display etc. can also be controlled as a peripheral device. Further, although no particular mention was made regarding the power source, in addition to general manganese dry batteries, lead-acid batteries, etc., a solar battery or the like may be used, or the configuration may be configured by switching between a battery and a commercial power source. In this case, for example, the hard disk can be driven only when power is supplied from a commercial power source by slightly changing the power capacity detection section and the priority supply section.

〔Effect of the invention〕

As described above, according to the present invention, power can be supplied to peripheral devices in stages in a desired order according to the power capacity of the power supply of the information processing device, and the supply status is stored as the connection status, thereby reducing power consumption. While achieving electrification, it is possible to effectively prevent sudden system downs when the power supply capacity is low, or data destruction in the worst case, and whether or not it is possible to operate can be determined only by the part that stores the connection status. Since this can be achieved by reading, there is no need to go through the trouble of testing the drive of peripheral devices.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an information processing device as an embodiment of the present invention, FIG. 2 is a block diagram of a specific example of the power capacity detection section of FIG. 1, and FIG. 5 is a block diagram of a specific example of the power capacity detection section of FIG. 2. A graph of a specific example of the input/output characteristics of the unit. FIG. 4 is an explanatory diagram of a table of a specific example of the leader ranking supply section in FIG. 1, FIG. 5 is an explanatory diagram of a table of one specific example of the connection status storage section of FIG. 1, and FIG. FIG. 6 is a table explanatory diagram of another specific example of the priority order supply unit. FIG. 7 is a block diagram of a conventional information processing device. FIG. 8 is a graph of general discharge characteristics of batteries. 1, 200... Information processing device, 6... CPU,
7... Floppy disk drive, 8... Hard disk drive, 9... Printer, 10... Serial section, 1o1... Common power supply circuit, 102... Power control board), 105... Switch Circuit network, 30o
...Power capacity detection section, 400...Priority supply section, 50o...Connection status storage section. Figure Z (A) Figure 3 Figure 4 Figure 5 Figure 6 ? View 1" 1° (111 minutes 3LL hours

Claims (1)

[Claims] 1. A central processing unit, the central processing unit, at least one peripheral device that performs data communication, a common power source, and the central processing unit controls power supply from the common power source to the peripheral device. means for detecting the power capacity of the common power supply; at least one peripheral device priority supply means for notifying the power supply priority of the peripheral devices to the central processing unit; Peripheral device connection status storage means for storing power supply status to peripheral devices is provided, and the peripheral device connection status storage means is provided to store the power supply status to the peripheral devices, and the peripheral device connection status storage means is provided to store the power supply status to the peripheral devices, and the peripheral device connection status storage means is provided to store the power supply status of the peripheral devices in a desired order step by step by referring to the peripheral device priority supply means according to the power capacity of the common power source. 1. A power supply system for an information processing device, characterized in that power is supplied to the device and the supply status is stored in the storage means.