JPH06266479A - Small-sized personal computer - Google Patents

Abstract

(57) [Summary] [Object] To provide a computer capable of automatically performing evacuation action without shutting down the system when AC power supply is stopped, and having a built-in power failure protection device in a small space. [Structure] The power supply is configured by a means 37 for generating a DC input based on an AC power supply 802 and a battery power supply 22, and means 805 for detecting AC power failure, and the power supply is changed to a battery power supply according to the output of the detection means 805. Switching means 80
4 is added, and the data in the volatile memory in the computer is automatically saved in the non-volatile memory by the interrupt processing according to the output of the detecting means 805.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer having a power failure protection device that enables a user to quickly take evacuation action without shutting down the system when AC power supply is stopped.

[0002]

2. Description of the Related Art Conventionally, a method of connecting a computer to an uninterruptible power supply has been used in order to prevent the computer system from going down in the event of a power failure.
Further, in a computer capable of both AC power driving and battery driving, it is general to switch to battery driving when the AC power is turned off.

[0003]

In the above-mentioned prior art, when an uninterruptible power supply is used, the method is to connect the power cable of the computer to the uninterruptible power supply. If the power supply is stopped, it is impossible to prevent the system from going down. In addition, the uninterruptible power supply takes up space as a stationary type outside the computer. In addition, the uninterruptible power supply operates independently of the computer to which it is connected,
Select ON / OFF of the uninterruptible power supply function from the computer, power supply status, whether the uninterruptible power supply is connected,
The computer cannot recognize the remaining battery charge, etc. Therefore, when the AC power supply is stopped, simply switching the power supply to the battery side may cause loss of data on the volatile memory due to battery exhaustion.

Further, in a computer capable of both AC power source drive and battery drive, the function of switching between AC power source drive and battery drive is for driving the computer by the battery for several hours after the AC power source is cut off. Therefore, the battery requires a relatively large capacity (that is, a large size), and thus occupies a large space in the computer. In addition, the charge and discharge control circuits are complicated. In addition, as a patent application related to the present technology, for example, Japanese Patent Laid-Open No.
No. 51303, No. 4-152410, No. 4-
151704 and the like are listed.

An object of the present invention is to provide a small personal computer capable of automatically performing an evacuation action without shutting down the system when AC power supply is stopped and having a built-in blackout protection device in a small space. To provide. Another object of the present invention is to provide a personal computer suitable for a LAN system and host connection, which realizes an optimal space saving for a client.

[0006]

To achieve the above object, a computer incorporating a power failure protection device according to the present invention comprises a means for generating a DC input voltage based on an AC power source, a battery power source, and an AC power source disconnection. Detecting means, a switching means for switching the power supply to a battery power source according to the detection output of this detecting means, and an interrupt process according to the detection output of the detecting means, so that the data in the volatile storage means in the computer is automatically And a processing means for saving the data in the non-volatile storage means.

[0007]

According to the present invention, when AC power is cut off by the detecting means, the power source is switched to the battery power source and the data in the volatile memory that needs to be saved is automatically saved in the non-volatile storage means such as a disk device. To do. That is, the battery power supply in the present invention is not for continuing the computer operation for several hours even after the AC power supply is cut off, and its main purpose is to avoid the data loss due to the unexpected power supply cutoff. Therefore, the battery power source built in the computer may have a minimum necessary capacity, which can contribute to the reduction in size and weight of the computer.

Further, since the power failure protection device of the present invention is built in the computer, the disconnection of the power cable to the external power failure protection device unlike the prior art is eliminated. Furthermore, by issuing a warning to the user in accordance with the detection output of the detection means, the user can immediately recognize the AC power interruption. Furthermore, by providing a power failure protection suppressing means for disabling the switching means in response to an instruction from the processing means, it is possible to cope with the case where an expansion unit or the like having a different power supply is connected.

The present invention further comprises a second detecting means for detecting a battery voltage indicating that the power source of the battery is cut off, and the switching means is controlled in accordance with the detection output of the second detecting means to supply electric power from the battery power source. Shut off. This can prevent the battery from being over-discharged. Further, by providing a third detection means for detecting a battery voltage indicating a voltage drop of the battery power supply and a second warning generation means for issuing a warning to the user in response to the third detection output, the remaining battery power remains. The user can recognize that the quantity is small. Furthermore,
By providing the notifying unit for notifying the user of the presence / absence of the power outage protection suppression, the user can recognize whether or not the power outage protection will be performed when the AC power is cut off.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outline of a compact information processing apparatus (hereinafter referred to as a system apparatus) according to an embodiment of the present invention is shown in FIGS. For convenience of illustration, the entire system is divided into FIG. 1 and FIG. The system unit 701 includes a high-speed microprocessor (CPU) 702 with a built-in cache memory, a large-capacity main memory 703 for processing programs and data, and a general-purpose bus 7 connecting the microprocessor 702 and various peripheral controllers.
04, a general-purpose bus 704, a controller 705 for controlling the main memory 703, a ROM (Read Only Memory) 706 storing a start-up process and a basic control program, a floppy disk 3, a fixed disk device (HDD) 21, a printer interface, a serial interface, etc. Peripheral controller 707, high-speed display controller 70
8. Display memory 709, CGROM 710 (Character Generator Rea) storing character display font patterns
d Only Memory), has a gate array, and has an IC 711 whose main function is power management. Also, as a file device, one 3.5-inch floppy desk device 3 described above, fixed with a large capacity of 2.5 inches. One disk device 21 is incorporated, and a compact keyboard device 18 is provided as an input device. A liquid crystal display device 17 is built in as a display device, and a black and white liquid crystal model (16 gradations) and a color liquid crystal model (16/51) are provided as liquid crystal types.
2 colors) can be selected. As the external input / output and function expansion interface, a ten keyboard interface 5, a mouse interface 6, a printer interface 16, a serial interface 8, an external display device connection display interface 14, and a built-in general-purpose bus function expansion bus interface 15 are provided.

As a power supply device, an external AC / DC
DC power source 72 converted from DC by the conversion adapter 721
2, the internal logic power supply and the liquid crystal drive power supply are supplied by the built-in DC / DC converter 37. In addition, a memory slot 724 for adding a main memory is provided inside the main body of the apparatus, so that a software program requiring a memory capacity can be supported. Further, it is equipped with two function expansion built-in slots 1 and 2 (102 and 104, respectively) equipped with a general-purpose bus 704 function, and a communication control function such as a LAN (Local Area Network) and a modem and various types of inputs are provided inside the device. Two output peripheral interface functions can be expanded simultaneously.

Further, as a means for supplying power, a power failure protection battery 22 is mounted inside, and when the external power source is cut off due to a power failure or the like, the battery controller 23 monitors the DC power source 722 to detect an abnormality. When it is detected, the power is switched to the battery operation and the power can be supplied for the time during which the work being processed can be saved.

All of the functions described above can be used as a full-scale information processing device from business to personal by storing them in a compact A4 book size case, and the communication functions installed in the built-in slots 1 and 2 make them compact. It can also be used as a network terminal and various communication terminals.

14 and 15 show system configuration diagrams.
The system device 701 is connected with various devices shown in the drawing,
By incorporating it, you can build a system according to your application.

As built-in devices, there are a main memory expansion memory board 724 and built-in slot mounting various communication boards 731. Various printer devices 732 from low speed to high speed are used as an output device, and a mouse 73 is used as an input device.
3. A ten keyboard 734 can be connected. Further, in order to further expand the system function, the system device 70
There is an expansion unit 735 that is docked to the 1 and mounted. The expansion unit 735 is provided with a board for expanding a communication function that cannot be covered only by a built-in expansion slot and an expansion board 736 for a storage device. File device 7
As 37, there are fixed disk and floppy disk devices. With the above various devices, it is possible to cover from the specifications based on the small-sized information processing device to the system specifications capable of supporting a plurality of communication procedures and comparable to a stationary information processing device equipped with a large-capacity file device. Hereinafter, the configuration of an embodiment of a small personal computer of the present invention,
1. Implementation, 2. Blackout protection device, 3. Power protection device, 4.
Memory circuit, 5. The system configuration will be described in detail.

1. Implementation (1) Outline Next, an outline of the implementation of the system device will be described. FIG. 3 is a left side view of an embodiment of the present invention. A built-in slot 1 is provided in the lower stage, and a built-in slot 2 is provided in the upper stage. FIG. 4 is a right side configuration diagram of the embodiment. A floppy disk drive (FDD) 3 is placed on the upper part in consideration of operability, and an interface connector for auxiliary input devices such as reset switch 4, numeric keyboard connector 5, mouse connector 6, tablet connector 7 and serial connector are arranged on the lower stage. 8 and the power switch 9 are arranged.
The connector section is provided with openable covers 10 and 11 to prevent malfunction and foreign matter mixture. A handle 12 that also serves as a palm rest is provided on the front surface. The display unit 27 is of an openable and closable type, and when it is not used, it is closed as shown in FIG. 2, but when it is used, it is opened as shown in FIG.
The keyboard 18 can be operated while watching. FIG. 5 is a rear view of the embodiment. Various external interface connectors such as a power supply connector 13, a CRT connector 14, an expansion bus connector 15, and a printer connector 16 are arranged on the rear surface. The detachable connector cover shown in FIG. 8 can be attached to each connector. FIG. 6 is a front view of the embodiment, and FIG. 7 is a plan view of the embodiment.

FIG. 8 shows an overall exploded view of the above-described embodiment. A floppy disk (FDD) 3 is arranged on the upper side on the right side of the rear of the main body, and a hard disk (HDD) 21 is arranged on the lower side of the main body. On the left side of the main body, built-in slot parts 1 and 2 are formed on the upper and lower stages, respectively. A built-in board can be installed from outside the main unit. A power failure protection battery 22 and a battery control board 23 can be built in the front part of the main body, and can be easily attached and detached from the outside by removing the keyboard 18 on the upper side.
At the bottom of the main body, a control board 3 including CPU control and display control
6, and DC / DC converter 3 which is a power source on the front left
7 are arranged so that the heat generation of each part including the FDD 3 and the HDD 21 is uniform as a whole. Also, interface connectors 5, 6, 7, 13, 1
4, 15, the power switch 9, and the lower built-in slot connector 102 are mounted on the control board 36 to simplify the mounting. Further, various devices such as the FDD unit 24, the HDD unit 25, the upper built-in slot unit 26, the display unit 27, and the main unit 28 are unitized to improve the assemblability. The LED board 29 can be directly connected to the connector of the FPC 31 attached to the FDD unit 24 through the body cover 30.

FIG. 9 shows the structure of the main unit 28.
Below the control board 36 and the DC / DC converter 37,
A shield plate 39, which also serves as a heat dissipation plate, is inserted between the insulating sheets 38 to enhance the circuit ground and enhance the heat dissipation effect. The control board 36 and the shield plate 39 are fastened together and fixed to the main body case 40.

(2) Details of built-in slot parts 1 and 2 FIG. 10 shows the mounting structure of the FDD, HDD, and built-in slot parts. The built-in slots of both the upper stage 2 and the lower stage 1 are structured so that the built-in board shown in FIG. FIG. 12 shows a cross section of the internal slot portion structure. In the lower stage, the lower case 40 is provided with a guide rail, and the connector 1 of the control board 36 is provided.
This is a structure in which the connector 102 of the built-in board 103 is directly connected to 01. As shown in FIG. 11, the upper stage is composed of a slot unit in which a slot guide 26, which is a separate component, is prepared, and a relay board 56 is attached to the slot guide 26 to be integrated. Signals are supplied to the slot unit as shown in FIG.
The structure is carried out through the relay board 56 directly connected by the connector from No. 6. When the upper built-in board 106 is inserted inside along the rail of the slot guide 26, the built-in board 10 is inserted into the connector 104 of the relay board 56.
The connector 105 of 6 is connected and a signal is supplied.

FIG. 13 shows an external view of the built-in boards 103 and 106. This built-in board is fixed to the slot guide 26 by a metal plate 59. In order to prevent a failure due to static electricity applied from the outside in the actual use state after the fixing, the slot guide 29 is made of sheet metal or a metal-plated mold. To use.

(3) Instantaneous interruption protection battery FIG. 16 shows an external view of the instantaneous interruption protection battery. The instantaneous interruption protection battery includes a battery body 22 and a control board 23.
The battery body 22 is composed of two rows of assembled cells, one row using odd number cells and the other row using even number cells. Therefore, the protection element 210 can be arranged in the space opened by one cell, and the space can be effectively used. Further, since the tape 211 is used to fix the two cells to each other, the tube 212 can be wound for each row, which is effective for insulation and leakage protection, and for the battery pack. There is an effect that manufacturing becomes easy. In addition, 201 is a cushion.

FIG. 17 is a diagram showing the case where the instantaneous interruption protection battery 22 is mounted on the main body. The control board 23 is fixed to the body case 40 with screws. Battery body 22
Are ribs 202, 203, 204, 2 of the body case 40.
When the keyboard 32 is positioned at 05, the cushion 201 attached to the battery main body 22 is compressed by attaching the keyboard 32 and fixed inside the main body.

(4) HDD / FDD Section FIG. 18 shows a mounting state of the FDD / HDD. FDD3
Is screwed to the FDD plate 50, and its control signal is connected to the control board 36 through the FPC 31. The HDD 21 is arranged below the FDD 3.
The HDD 21 is screwed to the HDD plate 51, and the SLOT. It is screwed to the HDD plate 53, and its control signal is connected to the control board 36 through the FPC 52. SLOT. The HDD plate 53 also serves as a fixed base for the upper built-in slot unit 26.

FIG. 20 shows an HDD / FDD mounting structure. Instead of directly attaching the HDD 21 to the HDD plate 53, the HDD 21 is attached to the HDD plate 51.
The plate 51 is attached to the HDD plate 53. This eliminates the need to remove the entire HDD unit 25 when replacing the HDD 21, and by simply removing the connector of the FPC 52 on the HDD 21 side, the HD
D21 can be easily removed.

(5) Shield Plate and Power Supply Unit Mounting FIG. 21 shows the appearance of the DC / DC converter 37. D
The C / DC converter 37 uses a metal substrate as its substrate to enhance the heat dissipation effect. The substrate itself is at the circuit ground potential.

FIG. 22 shows an external view of the shield plate 39. The shield plate 39 uses a metal spring material, and has a spring structure in a part thereof such as 502, 503, and 504. In addition, the DC / DC converter 37 and the control board 3
6 has a cut-and-raised part 505 with a screw hole so that it can be tightened together with the boss part of the main body case 40 at the same time.
FIG. 23 shows the connection relationship between the shield plate 39, the DC / DC converter 37, the control board 36, and the spring. DC
The / DC converter 37 and the control board 36 pass through the cut-and-raised part 505 of the shield plate 39, and the main body case 40
(See FIG. 9 etc.). As a result, in the screw tightened state, the control boards 36 and D are placed on the same shield plate.
The C / DC converter 37 is electrically and mechanically connected, so that the heat generated on the substrate is radiated and diffused on the shield plate 39 through the screw tightening portion. If the screw hole portion is used as a circuit ground, the shield plate 39 serves as a common ground and the ground is strengthened, and there is a remarkable effect in suppressing the radiated electromagnetic field and stabilizing the circuit operation.

Further, the spring portion 502 at the rear portion of the shield plate 39 comes into contact with the back plate 501 attached to the control board 36 as shown in FIG. 24 showing the CC ′ cross section of FIG. 7, and The HDD unit 25 has a rear portion screwed to the back plate 501 and a front portion shielded by the shield plate 3.
9 and the control board 36 are tightened together, the rear side of the control board 36 is entirely shielded with metal. In addition, springs 54 and 5 attached to the HDD unit 25 as shown in FIG. 25 and FIG. 26 respectively showing the DD′EE ′ cross section of FIG. 7.
5 and the spring portion 504 at the front of the shield plate 39 come into contact with the metal plate 510 on the back side of the keyboard 18, so that the front side of the control board 36 is also shielded by metal. Accordingly, the control board 36 and the DC / DC converter 37
Will be shielded with metal as a whole, which will be effective in suppressing the radiated electromagnetic field.

(6) Display Unit Section The construction of one embodiment of the display section is shown in FIGS.

The present embodiment is an embodiment in which the present invention is applied to a laptop personal computer. The display unit 27 mainly includes the liquid crystal display panel 17 and LC.
D relay FPC (flexible printed circuit board) 48, backlight driving inverter 45, LCD signal cable 4
6 points are incorporated, and an inverter 45 is arranged beside the liquid crystal display panel and an LCD relay FPC 48 is arranged above. In the display unit 27, the liquid crystal display panel 17 occupies most of the space, and the layout of the inverter 45, LC
Space for routing the D signal cable 46 is limited. Further, since the display unit 27 as a whole is thinned, the parts such as the inverter 45 also need to be thinned. Therefore, the inverter 45 is mounted on a single-sided component. In order to secure the board area for mounting the one-sided component, the board shape is made L-shaped as shown in FIG. 29 to secure the area, and the one-sided component mounting is enabled. Further, by making the inverter 45 L-shaped, the cable wiring route can be simplified, the cable length can be minimized, and the noise from the cable can be prevented. Because it can be used effectively,
It is advantageous for product miniaturization.

(7) Countermeasures for radiated electromagnetic field The mounting of the entire device is shown in FIG. 8, FIG. 23, FIG. 24, FIG.
6 is used, the display section is shown in FIG. 27, and the mounting of the control board 36 and the like will be described below with reference to FIGS. 30 and 31. Regarding the layer structure of the control board 36, in order to prevent the looping of signal pattern turns and the routing of detours, the signal layer is made up of four layers or more as shown in FIG. Radiation noise can be reduced by lowering the characteristic impedance of the wiring. Therefore, a ground layer and a power supply layer are provided on the substrate, but the effect is increased by making the substrate thickness t smaller than the usual 1.6 mm. Further, as shown in FIG. 30b, the layer structure is such that the signal layer, the ground layer, the signal layer, the signal layer, the power supply layer, and the signal layer are arranged from the component side, and the signal layer is sandwiched between the power supply and the ground layer, and wiring characteristics are provided. The impedance is reduced and the distance between the component and ground is shortened.

When the through holes are arranged at short intervals, a slit-like hole is formed in the ground layer or the power supply layer as shown in FIG. 30c, an impedance unmatch occurs between the signal line passing therethrough and the ground, and radiation occurs. The adverse effect that noise increases increases. In order to solve this, we decided to control the number of consecutive through holes, the distance between the through holes, the grounding of the through holes, and the clearance of the power supply layer. That is, the length l of the slits of the power source and the earth layer, which are continuously generated, is 8 mm or less, and even when the through holes are arranged at the shortest pitch on the substrate, the power source and the earth layer of the portion are slit-shaped as much as possible. The diameter of the clearance between the through hole and the power supply / ground layer was reduced so that it would not connect to the ground, and only the circular holes were formed in the power supply and ground layer around each through hole.

The ground of the board is connected to a shield plate 39, which serves as a common ground plane at a plurality of points on the board, to stabilize the ground potential. Regarding various connectors mounted on the board (5, 6, 7, 13, 14, 15, 16, etc. in FIG. 30), the metal shell of the connector should be in surface contact with the metal part of the housing as much as possible, The mounting was such that the metal shell of the connector was connected to the ground of the control board 36 by soldering or screwing. For a structure in which the metal shell of the connector does not come into contact with the above portion, an inductance is connected in series between the ground of the control board 36 and the ground arranged as a signal pin of the connector, and the metal shell of the connector is further shielded by a shield plate. It was grounded by making point contact with the spring 503 (FIGS. 22 and 23) of 39. Connector (5, 6, in FIG. 30)
7, 13, 14, 15), and a filter was inserted in the signal and power supply connected to the equipment outside the main body, and the filter was arranged in the immediate vicinity of the connector. Further, the internal circuit element connected to the filter is arranged near the filter so that the wiring between the filter and the circuit element is shortened.

The connector 108 is generated from the control board 36.
Liquid crystal display signal, liquid crystal display panel 1 supplied through
Filters are inserted in all the power supply lines for 7 and the backlight. When the drive element for the liquid crystal display signal on the control board 36 is CMOS and the input element of the liquid crystal display panel 17 which receives the signal is TTL, a pull-down resistor is connected between the liquid crystal display signal and ground to connect the signal. The amplitude of is reduced to suppress the generation of noise. Further, a ferrite core is inserted in the common mode in the LCD cable 46 of FIG. Thereby, the radiation noise from the liquid crystal display panel 17 and the LCD cable 46 is reduced.

A filter is inserted in the clock line of 14 MHz or more. The filter is arranged near the drive IC. A damping resistor is inserted in series with the control signal supplied to the memory 703 to increase the rising / falling of the signal.
Make the fall gentle. Since the power supply current of the DRAM used in the memory 703 depends on the signal waveform of the control signal, by making the control signal blunt,
Radiation noise from the DRAM can be reduced. The DRAM uses a device having a multi-bit data output pin. As a result, the number of memory elements accessed at one time is reduced, so that the current consumption of the DRAM is reduced and the noise radiated from the memory total can be reduced.

A ground potential guard pattern is provided along the clock line, the address / data bus line, and the control signal of the memory so that the crosstalk does not affect other signals. In order to prevent crosstalk in the IC element, the element assigned for clock driving is not used for driving other signals.

When high-speed signals of the CPU, memory, display system, etc. are wired along the normal signal lines, care is taken to prevent high frequency noise from being superimposed on the normal signal lines due to the influence of crosstalk. That is, on the plane of the printed circuit board, the wiring area is separated and designated by the signal type, and the wiring layer is separately designated. Particularly high-speed signals such as clock signals are wired using only the layer adjacent to the ground layer. However, this is not the case when the surface mount components are connected and the component distance is 5 mm or less. For the components to be mounted on the board, the surface mounting type is preferentially used in order to reduce the inductance of the component terminal portion to a low level and to reduce the slits in the power supply and ground layers by the through holes as shown in FIG.

The bypass capacitor is arranged near the power supply terminal of the IC. For the bypass capacitor, use a capacitor having excellent high frequency characteristics such as a multilayer ceramic capacitor of about 0.1 μF.
One bypass capacitor for each DRAM, QFP (Quad Flat Pack)
age), one or more on each side, and also for the power supply terminal of the connector. When a surface mount type capacitor is used for the decap, the shortest distance (1mm) from the component terminal to the through hole connected to the power / ground layer
Below).

No other signal is provided under or around the oscillator or oscillator circuit. In order to mount a component, the wiring distance is shortened, so that both the component side and the solder side of the printed circuit board are used. In particular, the memory is the memory 703 of FIGS. 30 and 31.
As seen from one side, it is placed at the same position on both sides. As shown in FIGS. 23, 24, and 25, the shield plate 39 laid on the bottom surface of the control board 36, the metal chassis 24 and 25 to which the FDD / HDD is attached, and the metal plate 510 attached to the back surface of the keyboard 18 are formed by screws or springs. There is continuity at multiple points. Note that, in FIG. 31, SOP indicates another package (Small Outline Package).

As shown in FIG. 27, the liquid crystal display panel 17 is surrounded by cases 41 and 43 that have been subjected to a conductive treatment, and the chassis of the liquid crystal display panel and the conductive portions of the cases 41 and 43 are electrically connected at a plurality of points. ing. Chassis of liquid crystal display panel 17, cases 41 and 43, and FDD / HDD chassis 2
4 and 25 are electrically connected by a conductive hinge 49. A signal is connected between the liquid crystal display panel 17 and the control board 36 by an LCD FPC 48 and a cable 46. The FPC (flexible printed circuit board) used has a multi-layer structure and one layer has a solid ground. In addition, when the FPC has a hole for pinching in the core and a tubular core is mounted with the FPC sandwiched, the signal pattern is wired in a loop shape so that the signal pattern passes through the hollow of the core and circulates on the FPC. is doing.

By the above measures, generation of radiated electromagnetic field noise can be prevented. Considering heat generation, CP as shown in Fig. 30
U702 was placed on the keyboard side in front of the device. 707,
708, 709, 710, and 711 are the peripheral controller, the display controller, and the RA, respectively, as described above.
M, CGROM, and control gate array.

2. Power Failure Protection Device FIG. 32 shows a schematic configuration of a computer incorporating the power failure protection device according to the present embodiment, focusing on the power failure protection device. In the figure, the power failure protection device comprises a control board (battery control controller board in FIG. 1) 23 shown in FIG. 17, a control circuit and a battery 22 formed thereon. 802 is an AC power source, 22 is a battery, 804 is a DC input / battery switching circuit, 80
5 is a DC input voltage detection circuit, 806 is a battery voltage detection circuit, 807 is a battery charging circuit, 36 is a control board having a computer function, 721 is an AC adapter,
Reference numeral 810 is an instantaneous power failure protection ON / OFF selection circuit, and 811 is a status output circuit.

The AC / DC conversion adapter 721 is an AC
The AC voltage from the power source 802 is received via the power cable, converted into a DC voltage, and output. The charging circuit 807 is
The battery 22 is charged by receiving the DC voltage from the AC / DC conversion adapter 721. DC input voltage detection circuit 8
05 detects that the DC voltage output from the AC / DC conversion adapter 721 has dropped below a predetermined value. The battery voltage detection circuit 806 detects the remaining capacity of the battery 22. DC input voltage / battery switching circuit 804
Is a DC input voltage detection circuit 80 indicating that the DC voltage supplied from the AC / DC conversion adapter 721 has dropped.
The power supply to the control board 36 and the like is switched from the AC power source 802 side to the battery 22 side by a signal from the control circuit 5. AC from the signal from the DC input voltage detection circuit 805
If it is known that the power has been restored, the switching circuit 804
The battery 22 is switched again to the AC power source 802 side.

The outputs of the detection circuits 805 and 806 are
It is held in the status output holding circuit 811. As a result, the current status of the power failure protection device 23, such as the presence or absence of DC input supply and the remaining battery capacity, is made clear to the control board 36. The control board 36 periodically reads this status and performs processing according to the status. That is, the control board 36 sounds an alarm by a signal notifying that the DC input supply is stopped,
By issuing a warning such as blinking D, the user can be immediately alerted when the DC input supply is stopped or the battery is dead.

Further, since the DC input supply is stopped, the status output holding circuit 811 is used, or D
A saving process for saving the data that should not be lost due to a power failure to a nonvolatile memory (for example, a disk device) by directly interrupting the control board 36 side from the C input voltage detection circuit 805 will be described later. It is automatically executed by software (interrupt processing).

Further, the instantaneous power failure protection ON / OFF selection circuit 81
A value of 0 disables the operation of the switching circuit 804, so that the instantaneous power failure protection function can be suppressed. That is, by controlling the on / off selection circuit 810 from the control board 36, it is possible to select on / off of the instantaneous power failure protection from the control board 36. The need to suppress the power failure protection function exists in the following cases. The control board 36 may be connected to an expansion unit that receives a separate power supply through the expansion bus connector 15 or the like. In such a case, a problem may occur due to the supply of a signal from the control board 36, even though the expansion unit is powered off during a power failure. If the instantaneous power failure protection function is suppressed, the occurrence of such a problem can be prevented.

FIG. 34 shows the internal structure of each part of the power failure protection device shown in FIG. The DC input / battery switching circuit 804 includes an electronic switch 841 of FET and an AND circuit 842 having a DTL configuration, for example. The AND circuit 842 outputs the output 15 from the DC input voltage detection circuit 805.
4 and the signal 867 of the battery voltage detection circuit 806,
Upon receiving the output 869 of the instantaneous power failure protection ON / OFF selection circuit 810, when all of these signals are active, the output signal is activated. As a result, the electronic switch 841 of the FET that is normally in the off state is turned on, and power is supplied from the battery 22 to the control board 36 and others.

The DC input voltage detection circuit 805 has a series resistor 85 for dividing the DC input voltage at a predetermined voltage division ratio.
1, 852 and a comparator 853 that compares the voltage at the connection point of both resistors with a reference voltage, and sends a signal to the DC input battery switching circuit 804 when the DC input voltage falls below a predetermined voltage. Is output.

The battery voltage detection circuit 806 includes series-connected resistors 861 and 862 for making the output voltage of the battery 22 at a predetermined voltage division ratio, a comparator 863 for comparing the connection point voltage with a reference voltage, and an output voltage of the battery 22. Of the serially connected resistors 864 and 865 for dividing the voltage at a different voltage dividing ratio and a comparator 866 for comparing the voltage at this connection point with a reference voltage. The voltage division ratio of the resistors 861 and 862 is set such that when the voltage of the battery 22 drops to a predetermined voltage (first voltage), the electronic switch 8 of the FET is provided to prevent the discharge of the voltage.
It is a value that can turn off 41. Also, the resistor 8
The voltage division ratio of 64 and 865 is the first voltage of the battery 22.
It is higher than the voltage of, but it should be a value that can indicate that the battery is low. When this value is reached, the comparator 8
A signal 868 is sent from 66 to the status holding circuit 811.

After all, when the output of the instantaneous power failure protection ON / OFF circuit 810 indicates protection ON, the electronic switch 841 has a DC input voltage that is less than a predetermined value and a battery voltage that is not less than a predetermined value. It is turned on only when the three conditions of, and are satisfied.

FIG. 33 shows the flow of processing for instantaneous power failure protection. Normally, the control board 36 is operated by an AC power supply. First, the voltage from the AC / DC conversion adapter 721 is checked (821). If the DC input is not supplied (that is, the AC power supply is stopped), the DC
The input / battery switching circuit 804 works (82
2) Switch the power supply to battery drive and control board 36
Prevent the system from shutting down the computer body including. Further, the power management IC 711 on the control board 36 indicates that the AC power supply has been cut off from this power failure protection device.
The power management IC 711 LED
Is turned on (824) or the alarm is turned on (82
A warning such as 3) can be issued to notify the user that the AC power supply is cut off. At this time, the power management IC 711 causes an interrupt (826).
This makes it possible for the software to automatically save the memory data. Further, it is possible to select ON / OFF of the instantaneous power failure protection from the control board 36. Further, it is possible to select ON / OFF of the instantaneous power failure protection from the control board 36. Then AC
When the power is restored (Yes in 827), the DC input / battery switching circuit 804 switches from battery driving to AC power driving. At the same time, warnings such as LED blinking and alarms are stopped. 1 and 2, the battery controller 23 and the power management I
The signal line between C711 is omitted and not shown.

According to the present embodiment, since the purpose is limited to the instantaneous power failure protection, the charge / discharge control circuit can be simplified and the circuit scale can be made very small. In addition, since only one computer is targeted for instantaneous power failure protection, and the battery is used only for evacuation activities, the battery is more difficult than the one used for an uninterruptible power supply or the battery of a battery-powered computer. The size of the battery can be reduced to about 1/10 of that of a battery and a control circuit of a battery-powered computer, and the battery can be easily incorporated in the computer.

3. Power Supply Protection Circuit An embodiment of the power supply protection circuit of the present invention will be described below with reference to FIG. The power supply protection circuit of this embodiment is configured on the control board 36, and for the purpose of supplying electric power to the DC / DC converter 37, the control board 3 outside the main body.
This is effective when there are a plurality of different types of power supply devices that can be physically connected through the connector 13 on the above-mentioned 6. In the protection circuit of the present invention, of the power supply devices that may be physically connected to the power supply connection connector 13 having the same shape, when a power supply device that cannot be used in a functional manner is connected, the control board 36, In order to protect the main body of the system device 701 including the others, the system main body and DC / D
This is a circuit that prohibits the operation of the C converter 37.

FIG. 35 is a circuit configuration diagram of a power supply protection circuit according to an embodiment of the present invention. The power supply protection circuit is as follows. The amplifier circuit (AMP) 401 amplifies a minute current added to the connection device detection signal SIG1. The semiconductor switch circuit (TRSW) 402 is an amplifier circuit (AM
P) When a minute current flows through 401, this is amplified and supplied, and turned on. When the power switch (SW) 9 is turned on, the DC /
A current flows from the power supply operation permission signal 412 to the DC converter 37 in the direction of FIG. DC / DC converter 37
Is a control circuit (CONV.C) 4 for operating the power supply device.
04, converter circuit (CON
V) 405, a semiconductor switch (T
The RSW) 403 is a device mainly configured. AMP4
01 and TRSW 402 are the DC / DC circuit of the battery controller 23 of the system unit 701 of FIG.
It is inserted between the converters 37.

The DC / DC converter 37 is controlled by the power supply device operation permission signal 12 to start or stop its operation. That is, when the power input line (DCIN) 409 drops below the voltage required to turn on the semiconductor switch 403, the semiconductor switch 403 turns on, the control circuit 404 starts up, and the specified voltage is output to the power supply output (OUT1) 415. To be done. Output 41 of this converter 37
5 is the output of the DC / DC converter 37 (CH1,
CH2).

Next, the protection operation of this circuit will be described. Power receiving connector 13 of the system unit 701 main body (FIG. 30)
In order to identify a power supply device that can be physically connected but should not be functionally connected, the power supply device is connected to the system device 701 main body connector and the power supply connector 13 of the main body. Besides 410 detection signal S
Allocate IG1. The protection circuit of the present invention realizes the protection circuit by using SIG1. DCIN40
Both 9 and SIG1 are supplied from the AC adapter 721.

When a power supply device which should not be used is connected, a minute leakage current or leakage voltage from the circuit in the power supply device flows into the detection signal SIG1. The minute signal is amplified by the amplifier circuit 401 to a level at which the semiconductor switch 402 can operate, and the semiconductor switch 402 is turned on.
Set to N. As a result, even when the power switch 9 is in the ON state, since the current limiting resistor 407 is provided, the power supply operation permission signal line 412 does not drop in voltage to the operation permission level of the DC / DC converter 37, and the DC / DC converter 37. Does not work.

When a power supply device compatible with the main body of the system device 701 is connected, the detection signal SIG1 is not connected, the amplifier circuit 1 does not operate, and the semiconductor switch 402 is turned off.
It becomes FF. Therefore, when the power switch 9 is turned on, the operation permission signal 412 drops to the operation permission level through the current limiting resistor 407, the semiconductor switch 403 in the DC / DC converter 37 is turned on, and the power supply device operates.

4. Memory Circuit An embodiment of the present invention will be described below with reference to the drawings. 36 and 37 are circuit configuration diagrams of a memory circuit configured on the control board 36 according to the embodiment of the present invention.

In the memory circuit, the memory control circuit 303 controls the memory elements 304 and 305. The memory circuit is accessed by the CPU 302 or another peripheral circuit connected to the bus 301. These elements correspond to the controller 705 for control in FIGS. 1 and 2, the standard memory 703 microprocessor 702, and the bus between them. The memory control circuit 303 includes a memory address control circuit (AMC) 306 and a memory data control circuit (DC
ON) 307. The AMC 306 generates and outputs the addresses of the memory elements 304 and 305. Some of the generated memory addresses are used by connecting in parallel with the memory elements 304 and 305. The DCON 307 includes a timing control circuit for performing memory control and a memory data output switching control circuit. The memory control device 303 also includes circuits necessary for operating memories (not shown) other than the AMC 306 and DCON 307. The memory devices 304 and 305 are composed of memories including a data output control buffer and a memory array control circuit (DMC) 308. The DMC 308 controls the memory array (MEM) 309 and controls the memory array (MEM).
309 has an output control buffer for the data output by 309, and the output buffer is controlled by a unique signal line included in the memory element. The memory devices 304 and 305 have the same physical interface, and the data input / output signal lines are connected in parallel and connected to the memory data bus signal line 316.

First, the operation will be briefly described. Fig. 36
Is a memory circuit having a 2-bank configuration, and in this description, the CPU 3
A case where the memory 02 reads the memory through the bus 301 will be described with reference to an example shown in the memory timing chart of FIG. The memory elements 304 and 305 will be described as an example in which the memory element 304 is arranged at even addresses and the memory element 305 is arranged at odd addresses.

The CPU 302 sequentially gives memory access addresses to the memory control circuit 303 a certain number of times through the bus 301. The memory address control circuit AMC30 in the memory control circuit 303 outputs the even address ADR0 to the memory element 304 in accordance with the timing of the memory timing chart of FIG.
The ON 307 sets the memory address latch signal MCONT-OD to Low and outputs CNT0 to the memory element 304.

The memory element 304 is a memory array MEM.
While the data read operation is being performed by the memory device 309, the odd address ADR1 is output to the memory device 305, and the memory data control circuit DCON307 outputs the memory address latch signal MCONT-EV to the memory device 305 as Lo.
Set to w and output CNT1. At this point, the memory device 30
4 and 305 are simultaneously performing a read operation from the memory array MEM309. Memory elements 304 and 30
5 sequentially finishes the memory read operation from the memory array MEM309 and supplies the data to the data buffer in the DMC 308 in the memory element. The memory control circuit 303 is a data control circuit DCO of the memory control circuit 303 for reading data prepared in the DMC 308 in the memory device.
Memory data output enable signal ME by N307
The MOE-OD is set to Low and the data in the memory element 4 is sent to the CP via the memory data bus signal line 316 and the bus 301.
Read data is given to U302 and returned to MEMOE-OD signal Hi, and at the same time, memory address latch signal MCO
The NT-OD is returned to Hi to complete the reading and prepare for the next memory reading operation.

When the preparation for the next memory read operation is completed, the memory control circuit 303 starts the next memory access cycle. At the same time, the memory device 304
As soon as the MEMOE-OD signal of the signal returns to Hi, the data prepared in the DMC in the memory element 5 is read out. Therefore, the data control circuit DCON 307 of the memory control circuit 303 causes the memory data output enable signal signal MEMOE-E.
When V is set to Low, the data in the memory element 305 is transferred to the CPU 30 through the memory data bus signal line 316 and the bus 301.
2 is given read data, MEMOE-EV is returned to Hi, and at the same time, memory address latch signal MCONT-E
V is returned to Hi to complete the read and read operations, and prepare for the next memory read operation.

When the preparation for the next memory read operation is completed, the memory control circuit 303 starts the next memory access cycle. Repeat this for CPU30
It is performed until the end of the memory access operation from 2 or other repeated end conditions occur. By performing the above-described operation, as shown in the memory data output MEMDATA of the memory timing of FIG. 38, the CPU 30
Data can be sequentially transferred to the memory 2 without concern for the memory access time.

FIG. 37 shows an embodiment in which the memory circuit of FIG. 36 is improved. This will be described with reference to the drawings. FIG. 37 shows memory elements 304 and 30 which constitute a memory circuit.
5 shows a case in which the circuit is configured by using the memory elements 320, 321 as shown in FIG. In this case, the memory element 32
It is necessary to add an output control buffer DBUF319 as a buffer IC having an output control function to the data input / output signal lines or output signal lines 0 and 321. The output enable pin of the output control buffer DBUF319 has the same function as the data output control function of the control signal of the data output control buffer included in the memory elements 304 and 305. As a result, it is possible to connect a memory device having no output control buffer. The memory devices 320 and 321 are the expansion memory slots 724 of FIG.
The output control buffer DBUF319, which is the upper memory, is also provided on the expansion memory slot 724.

A signal line 319 as a bypass route of the output control buffer DBUF319 indicates a signal line through which write data flows when the bidirectional type is not used for the output control buffer. Adding memory by expanding memory, etc.
Memory control circuit 303, in-circuit memory address control circuit AMC 306, memory data control circuit DCON 307
Can be realized by extending. Connection of the memory element is realized by having one or a plurality of circuits similar to those of the memory element shown in FIG. 36 or FIG. The memory address control circuit AMC 306 and the memory data control circuit DCON 307 in the circuit may be mounted from before the memory expansion to before the expansion.

5. System Configuration By using the device of the present invention, a LAN system or network as shown in FIGS. 39 to 44 can be constructed.

FIG. 39 shows a personal computer 701 and built-in boards 103 and 10 of the present invention connected to a LAN.
In addition to a common access (shared printer, file) function to a normal server by a plurality of client devices including 6 and one server device configuration, a client can be created by connecting a LAN network and a host computer via a gateway device. The device 701 of the present invention can be used both as a client of the LAN and as a host terminal with a configuration that allows simultaneous access between a server and a host.
Further, FIG. 39 is an example in which a dedicated protocol different from the LAN protocol is used between the host and the host.

40 is different from FIG. 39 in that a printer and a file are further connected to a device serving as a gateway to have a server function, and a server can be added without increasing the number of devices. 41 shows an example having the same configuration as that of FIG. 39 but using a common LAN protocol between the host and the host.

FIG. 42 shows a normal LAN configuration (client, server system). FIG. 43 shows an example in which the device 701 of the present invention is directly connected to the host using a line.
01 has built-in boards 103 and 106 as built-in boards, which allows direct connection to lines. With this configuration, the device 701 of the present invention can be used as a space-saving host terminal. FIG. 44 is an example in which the device 701 of the present invention is connected to a host via a terminal control device (TCE). The terminal control device can be built in as the built-in boards 103 and 106 of the device 701 of the present invention, and a space-saving host terminal can be provided. realizable.

As described above, various types of systems can be realized with space saving and low cost by using the device 701 of the present invention.

[0072]

According to the present invention, when the AC power supply of the computer is stopped, the user can perform the evacuation operation without shutting down the system, and
It is possible to provide a power failure protection device which is composed of a control circuit and a battery and can be incorporated in a computer in a small space. Further, it is possible to provide a high-speed and space-saving personal computer suitable for a client.

Further, by using a memory having a built-in data control buffer and a special memory control circuit corresponding to the memory circuit, a memory circuit which can be accessed at a low cost and at a very high speed can be constructed. Can be realized. Further, by using the memory with the built-in data control buffer, the circuit can be simplified and the size can be reduced as compared with the conventional memory circuit adopting the same memory control method.

[0074]

[Brief description of drawings]

FIG. 1 is a block diagram (1) of a system device according to an embodiment of the present invention.

FIG. 2 is a system device block diagram (2) according to an embodiment of the present invention.

FIG. 3 is a left side configuration diagram of an embodiment of the present invention.

FIG. 4 is a right side configuration diagram of an embodiment of the present invention.

FIG. 5 is a rear view of an embodiment of the present invention.

FIG. 6 is a front view of an embodiment of the present invention.

FIG. 7 is a plan configuration diagram of an embodiment of the present invention.

FIG. 8 is an overall exploded configuration diagram of an embodiment of the present invention.

FIG. 9 is a configuration diagram of a main body unit according to an embodiment of the present invention.

FIG. 10 is a structural diagram of the FDD / HDD / built-in slot portion mounting structure according to the embodiment of the present invention.

FIG. 11 is a configuration diagram of a slot unit according to an embodiment of the present invention.

FIG. 12 is a structural diagram of a built-in slot portion according to an embodiment of the present invention.

FIG. 13 is an external view of a built-in board according to an embodiment of the present invention.

FIG. 14 is a system configuration diagram (1) of one embodiment of the present invention.

FIG. 15 is a system configuration diagram (2) of one embodiment of the present invention.

FIG. 16 is an external view of a momentary interruption protection battery according to an embodiment of the present invention.

FIG. 17 is a schematic view of a battery for instantaneous interruption protection according to an embodiment of the present invention.

FIG. 18 is a configuration diagram of an FDD unit according to an embodiment of the present invention.

FIG. 19 is a configuration diagram of an HDD unit according to an embodiment of the present invention.

FIG. 20 is a mounting diagram of an FDD / HDD according to an embodiment of the present invention.

FIG. 21 is an external view of a DC / DC converter according to an embodiment of the present invention.

FIG. 22 is an external view of a shield plate according to an embodiment of the present invention.

FIG. 23 is a connection relationship diagram of a shield plate and a spring according to an embodiment of the present invention.

FIG. 24 is a connection state diagram (1) (C-C ′ cross section) of the shield plate and the spring according to the embodiment of the present invention.

FIG. 25 is a connection state diagram (2) (cross section DD ′) of the shield plate and the spring according to the embodiment of the present invention.

FIG. 26 is a connection state diagram (3) (section E-E ′) of the shield plate and the spring according to the embodiment of the present invention.

FIG. 27 is a configuration diagram of a display unit according to an embodiment of the present invention.

FIG. 28 is a mounting diagram of a display unit according to an embodiment of the present invention.

FIG. 29 is an external view of an inverter according to an embodiment of the present invention.

FIG. 30 is a mounting diagram of a control board according to an embodiment of the present invention.

FIG. 31 is a component layout diagram (solder surface) of the control board according to the embodiment of the present invention.

FIG. 32 is a configuration diagram of an instantaneous interruption protection device according to an embodiment of the present invention.

FIG. 33 is a flowchart of the instantaneous interruption protection device according to the embodiment of the present invention.

FIG. 34 is a specific configuration diagram of the instantaneous interruption protection device according to the embodiment of the present invention.

FIG. 35 is a power supply protection circuit diagram of an embodiment of the present invention.

FIG. 36 is a memory circuit configuration diagram of an embodiment of the present invention.

FIG. 37 is a memory circuit configuration diagram of another embodiment of the present invention.

FIG. 38 is a memory timing diagram of an example of the present invention.

FIG. 39 is a LAN connection diagram (1) according to the present invention.

FIG. 40 is a LAN connection diagram (2) according to the present invention.

FIG. 41 is a LAN connection diagram (3) according to the present invention.

FIG. 42 is a LAN connection diagram (4) according to the present invention.

FIG. 43 is a line connection diagram of the present invention.

FIG. 44 is a connection diagram of the coaxial cable of the present invention.

[Explanation of symbols]

1 ... Built-in slot 1, 2 ... Built-in slot 2, 3 ... Floppy disk, 4 ... Reset switch, 5 ... Numeric keyboard interface, 6 ... Mouse interface,
7 ... Tablet interface, 8 ... Serial interface, 9 ... Power switch, 10, 11 ... Openable cover, 12 ... Handle, 13 ... Power connector, 14 ...
Display interface for external display device connection, 1
5 ... Bus interface for built-in general-purpose bus function expansion, 1
6 ... Printer interface, 17 ... Liquid crystal display device,
18 ... Compact keyboard device, 19, 20 ... Connector cover, 21 ... Fixed disk device, 22 ... Battery, 23 ... Battery control controller, 24 ... FDD
Unit, 25 ... HDD unit, 26 ... Upper built-in slot unit, 27 ... Display unit, 28 ... Main body unit, 2
9 ... LED board, 30 ... main body cover, 31 ... liquid crystal, F
DD signal FPC, 32 ... Keyboard, 36 ... Control board,
37 ... Built-in DC / DC converter, 38 ... Insulation sheet,
39 ... Shield plate, 40 ... Main body case, 41 ... Case, 43 ... Case, 45 ... Backlight driving inverter, 46 ... LCD signal cable, 48 ... LCD relay F
PC, 49 ... Hinge, 50 ... FDD PLATE, 51
... HDD PLATE, 52 ... HDD FPC, 53 ...
SLOT. HDD PLATE, 54, 55 ... Spring, 5
6 ... Relay board, 59 ... Metal plate, 60, 61 ... Inverter connector, 101 ... Lower internal slot connector, 102 ... Lower internal slot connector, 103 ...
Lower built-in board, 104 ... Connector for upper slot,
105 ... Upper built-in board connector, 106 ... Upper built-in board, 107 ... Upper slot relay connector, 108
... Liquid crystal display, FDD signal relay connector, 109 ... HD
D signal connector, 110 ... Keyboard connection connector, 201 ... Cushion, 202, 203, 204, 2
05 ... Rib, 210 ... Protective element, 211 ... Tape, 21
2 ... Tube, 301 ... Bus, 302 ... CPU, 303
... Memory control circuit, 304, 305 ... Memory element, 30
6 ... Memory control circuit AMC, 307 ... Memory control circuit D
CON, 308 ... DMC, 309 ... Memory array ME
M, 316 ... Memory data bus signal line, 319 ... Output control buffer DBUF, 320, 321 ... Memory element, 4
01 ... Amplifier circuit, 402, 403 ... Semiconductor switch, 4
04 ... Control circuit, 405 ... Converter circuit, 407 ... Current limiting resistance, 409 ... Power input line, 410 ... Detection signal S
IG1, 412 ... Power supply operation permission signal, 415 ... Power supply device output, 501 ... Back plate, 502, 503, 504 ... Shield plate (part), 505 ... Shield plate cut-and-raised part 510 ... Metal plate, 701 ... System body Device, 702 ... High-speed microprocessor with built-in cache memory, 703 ... Large-capacity main memory for program and data processing, 704 ... General-purpose bus, 705 ... General-purpose bus / main memory control controller, 706 ... ROM, 707
… Peripheral controller, 708… High-speed display controller,
709 ... Display memory, 710 ... CGROM, 711 ...
Power management IC, 721 ... AC / DC conversion adapter, 722 ... DC power supply, 724 ... Memory slot, 731 ... Built-in board, 732 ... Printer device, 73
3 ... Mouse, 734 ... Numeric keyboard, 735 ... Expansion unit, 736 ... Expansion board, 737 ... Various file devices, 802 ... AC power supply, 804 ... DC input / battery switching circuit, 805 ... DC input voltage detection circuit, 806
... Battery voltage detection circuit, 807 ... Battery charging circuit, 810 ... Instantaneous power failure protection ON / OFF circuit, 811, ... Status holding circuit, 821,827 ... DC / DC converter voltage detection result, 822,825 ... 804 switching signal,
823 ... Alarm signal, 824 ... LED blinking signal, 82
6 ... Interrupt signal, 841 ... FET, 842 ... AND circuit,
851, 852 ... Resistance, 853 ... Comparator, 854 ... 80
5 outputs, 861, 862 ... Resistance, 863 ... Comparator, 8
46, 865 ... Resistance, 866 ... Comparator, 867 ... 806
Output, 868 ... 866 output, 869 ... 810 output.

Continuation of front page (51) Int.Cl. ⁵ Identification number Reference number in the agency FI Technical display location 7165-5B G06F 1/00 335 C (72) Inventor Hiroyuki Tanaka 7-1-1, Higashi Narashino, Narashino, Chiba Prefecture Hitachi Keiyo Engineering Co., Ltd. (72) Inventor Yosuke Konaka 7-1-1 Higashi Narashino, Narashino City, Chiba Prefecture Hitachi Keiyo Engineering Co., Ltd. (72) Inventor Kaaki Nomura 810 Shimoimaizumi, Ebina, Kanagawa Prefecture Stock Company Hitachi, Ltd. Office Systems Division (72) Inventor Nobuo Arinaga 810 Shimoimaizumi, Ebina, Kanagawa Stock Company Hitachi Ltd. Office Systems Division (72) Inventor Takahiro Maeda 810 Shimoimazumi, Ebina, Kanagawa Stock Company Hitachi (72) Inventor Mari Kurita 810 Shimoimaizumi, Ebina, Kanagawa Stock Company, Hitachi Office Systems Division

Claims (10)

[Claims] 1. A computer having a built-in power failure protection mechanism, which generates a DC input based on an AC power supply, a battery power supply, a first detection means for detecting AC power interruption, and the first detection. Switching means for switching the power supply to the battery power source according to the detection output of the means, and interrupt processing according to the detection output of the first detection means, so that the data in the volatile storage means in the computer is automatically nonvolatile storage means. A computer having a built-in power failure protection mechanism, characterized in that the computer has a processing means for evacuating. 2. A computer incorporating a power failure protection device according to claim 1, further comprising first warning generation means for issuing a warning to a user in accordance with a detection output by the first detection means. 3. A computer device incorporating a power failure protection device according to claim 1, further comprising power failure protection suppression means for disabling the switching means in response to an instruction from the processing means. 4. A power supply by the battery power supply, comprising a second detection means for detecting a battery voltage indicating that the battery power is off, and controlling the switching means according to a detection output of the second detection means. A computer having a built-in power failure protection device according to claim 1, wherein the computer is shut off. 5. A third detection means for detecting a battery voltage indicating a voltage drop of the battery power source, and a second warning generation means for issuing a warning to a user according to a detection output of the third detection means. Claim 1 characterized by the above.
A computer that incorporates the described power failure protection device. 6. A computer incorporating a power failure protection device according to claim 3, further comprising notification means for notifying a user of an output state of said power failure protection inhibiting means. 7. At least a CPU organically bus-connected
A computer device in which a control board on which a main memory, a controller for control, a display controller, and a peripheral controller are installed is installed in the main body, and has a built-in slot in which at least two built-in boards can be mounted. However, the computer device is characterized in that the built-in slots are installed in upper and lower two stages on the side of the main body. 8. One of the connectors for the built-in board is directly installed on the control board, and the other connector is installed on a relay board connected to the control board. 7. The computer device according to 7. 9. At least a CPU organically connected to a bus
A personal computer having a control board on which a main memory, a controller for control, a display controller, and a peripheral controller are installed, and a shield plate inside the main body is mechanically and electrically integrated with the control board. A small personal computer characterized by. 10. A personal computer having at least a CPU, a main memory, a controller for control, a display controller, and a peripheral controller installed in the main body, and a control board, and a DC / DC converter for supplying power to these. The radiation noise is reduced by making the shield plate inside the main body, the DC / DC converter, the control board, and the keyboard have the same potential using a spring or the like integrated with the sheet metal. And a personal computer.