JPS5890225A - Power supplying system of information processor - Google Patents

Abstract

PURPOSE:To simplify the constitution of a power supply circuit for an information processor which is used after a computer main body is connected to a peripheral device, by supplying the power supply voltage of the peripheral device to the computer main body and the constant voltage of the computer main body to a prescribed part of the peripheral device, respectively. CONSTITUTION:A computer main body A incorporates a primary battery 50 and a constant voltage circuit 51. A constant voltage Vcc is supplied to the entire part of the main body A including a CPU of the side of the body A, an I/O port 52 etc. The voltage Vcc is also supplied to an I/O port and an ROM53 in case the main body A is loaded to a peripheral device B. The power is supplied to a printer 54 of the device B, a cassette interface CMT and a remote circuit 55 from a secondary battery 56 incorporated into the device B. When the voltage of the battery 50 drops, the power of the battery 56 is supplied to the main body A via a diode D1. An AC adaptor is available to both the main body A and the device B since the voltage of the battery 50 is slightly lower than the output voltage of an adaptor. The device B can eliminate a constant voltage circuit to simplify the constitution of a power supply circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply system for an information processing apparatus that can be used by connecting peripheral devices such as a printer and a cassette interface to a computer main body.

Conventionally, portable program calculators, as shown in Figure 1,
It is detachably attached to a peripheral device 3 having a built-in printer 2 (or cassette intern ace), etc., and is used in the form of a scale depending on various purposes.

However, conventionally, each of the power supply circuits for the computer main body 1 and the peripheral device 3 is provided separately and operated independently, so if one of the devices stops functioning due to battery exhaustion, etc. This has the disadvantage that it adversely affects the functions of other devices, making it impossible to achieve the desired purpose as a whole system, and furthermore, there is a problem in that the power supplies in both devices cannot be used effectively.

The present invention has been made in view of the problems in the power supply system for conventional information processing devices J and qt as described in (-) above.

In other words, the purpose of this is to reduce the power supply capacity of peripheral devices such as printers, cassette interfaces, etc. to the computer itself (when the battery voltage drops, ). The idea is to share the constant voltage circuit between the computer itself and peripheral devices. By supplying a constant voltage power source, which is generated by the main computer, to the specified circuit parts (ROM, /, etc.) of peripheral devices, the circuit configuration can be simplified and an inexpensive device can be provided. be.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an external view of an example of a computer main body used in the present invention. In the figure, 4 is the main body of the computer, and 5 is a key unit, which includes a character table key 6, a numerical manual key 7, and the like.

Reference numeral 8 denotes a display section consisting of a dot-tricks liquid crystal display device. A power supply circuit and a battery are built into the main body of the computer, and the computer is constructed so that it can be detachably attached to a peripheral device such as a printer or a cassette internace as shown in FIG.

Below is an example of the specific system configuration of the computer main body.
An example of the system configuration of the Ushida peripheral device will be explained based on the block diagrams of FIGS. 4 and 5. First, in FIG. 3, 9 is a liquid crystal display element (LC).
D) It is a special display section, and the display drive circuit 10 controls the lighting of the character display size and symbol segments.

11 receives a key strobe signal from 12, and outputs a key IJ turn signal to the microgross unit 13. i/J, ,'l5 is a read/write memory in which each iΦ register, flag, program, etc. are stored. 1. G,'! Reference numeral 7 is a read-only memory, in which the interpreter that executes the program and its control program are stored in advance.] 8&j: RAMI 4,
] This is a connector for connecting as a memory module of 5, ROMP, 6, 1.7. These memories are address bus, data bus, ? 1IIJ ■ Connected to the official lotus. Mobo I/12 is an input/output boat,
It is connected to the address bus, data bus, and control bus, and performs intern ace for the microprocessor unit 13K. Reference numeral 20 denotes a buzzer sound generating body, which is driven by a sound generating body driving circuit 2J. 23 is a clock circuit. The boat 12 inputs/outputs overtones to these input/output devices. In other words, it outputs a strobe signal to the key input device 11, and inputs/outputs time data to/from the clock circuit 23. , outputs a drive signal to the drive circuit 21. Reference numeral 19 is a connector for connecting an external input/output device such as a data recorder or printer, or an expansion memory. The microprocessor unit 13 outputs a periodic signal HAN and a display / signal DIsp to the display drive control circuit 10, and outputs back plate signals Ho to 7 to the front FF receiving section 9. The display drive control circuit 10 has a built-in display memory corresponding to each segment of the display section 9, and each bit corresponds to the display memory. That is, desired characters and symbols are displayed by writing a bit pattern corresponding to the display pattern.

Next, the system configuration of an example of the peripheral device according to the present invention will be explained in the fourth section.
This will be explained based on the drawings and FIG. In the figure, the address bus, data bus, and control bus.

Each line of the CMT-IN and CMT-OUT signals is connected to the computer main body by the connector CN2 (19) shown in FIG. 3 mentioned above. CMT=IN is serial data obtained from the interface circuit 33 by putting the tape recorder into the playback state, and CMT-OUTiJ
: Serial data output to the interface circuit 33. Relay 34. ．． The 3511d relay is for ON1FF control of the remote terminal of the tape recorder, and the drivers 36 and 37 are its drive circuits. Reference numeral 32 inputs an X motor, a drive signal S1 for the X motor, a drive signal S2 for a solenoid for moving the pen up and down, and outputs a dull color detection signal S3. Driver ■ 38.39 is a driving circuit for these. The board 30 is connected to an address bus, a data bus, and a control bus from the computer main body through a connector CN2 (see FIG. 3).

Reference numeral 31 is a read-only memory in which programs for controlling peripheral devices (printers, cassette interfaces, etc.) are stored.

Figure 5 shows the power supply circuit section provided in the peripheral device.
40 is a secondary battery (for example, five Ni-Cd AA batteries). 41 is a check circuit for checking a drop in battery voltage of the secondary battery 40, and its detection signal is input to the board 30 (FIG. 4). Therefore, for example, if the user
RAM in the figure 14. , 1.5) When executing the program, the battery voltage is checked when using this peripheral device (Plink, etc.). If the result is abnormal, the computer itself will display this as an error.

FIG. 6 particularly shows the relationship between the power supply circuit configurations of the computer main body A and the peripheral device B. That is, the computer main body A has a built-in primary battery 50 and a constant voltage circuit 51, and the regulated voltage is applied to the MPU and RA in the computer main body as Vcc.
, ROM, etc. (corresponding to 13 to 17 in Figure 3) (hereinafter referred to as CP
It is abbreviated as U. )■ and 4 boats (corresponding to 12 in Figure 3), etc. (indicated by 52)
Power is supplied to everything inside the computer. ■ In the state where computer main body A is attached to peripheral device B, the Vcc power supply is connected to the peripheral device's 4 ports and ROM.
53 (corresponding to 30.31 in FIG. 4).

Printer 54 and cassette interface C of peripheral device B
1: Power supply for MT and remote circuit 55 is supplied from secondary power 41-1 built in peripheral bag j1ν1. The power on the main body side A is full! , 5 () The power of peripheral device B is supplied to the computer main body side (Jl) through phantom field D1 whose voltage has decreased. Can be used for any of B. Adapter nail 1: When used for Kikyu A, it is supplied as power for the main body side of C. However, when used for peripheral bag f5 B, j~/ζ case i: Ac Since the adapter's 41.H voltage is somewhat higher than the main unit's battery voltage, power is supplied to both peripheral device B and main unit computer A.

In this way, is there a constant voltage for some of the peripheral devices B (e.g., a memory board, a ROM board)? The Ij source is supplied from the computer main body A, and if it is 1, the power to the computer main body is supplied from the peripheral device B, and the peripheral device 131
The power supply circuit of 1υ is simplified, and even if the computer's personal battery is turned off, power is supplied from the peripheral device B side. ■ Fluctuations in battery power supply voltage.

Although it has a negative effect, constant voltage f'F, 'if, n sources can be supplied to the hardware, ROM, CPU, etc. via a constant voltage circuit, and it is only necessary to provide a constant voltage circuit on the computer main body side. , the constant voltage circuit in the peripheral device can be omitted, and the power supply circuit can be simplified.

As explained above, according to the present invention, it is possible to simplify the power supply circuit in the peripheral device, and even if the battery on the computer main body side fluctuates due to consumption etc., it can be supplied from the peripheral device. It has the advantage of being able to effectively utilize the power supply between the device and the device.

[Brief explanation of the drawing]

Fig. 1 is an external view showing a portable program computer attached to a peripheral device with a built-in printer, cassette interface, etc. Fig. 2 is an external view of an example of the computer main body used in the present invention, and Fig. 3 is an external view of the computer. A block diagram showing an example of a specific system configuration of the computer main body, FIGS. 4 and 5 are block diagrams showing a specific system configuration of peripheral devices, and FIG. 6 shows a power supply circuit configuration of the computer main body and peripheral devices. It is a diagram. In the figure, 1, 4. Computer body, 2: Printer, 3: Peripheral equipment, 5.11: Key human power device, 8: Display, 12:'/
6 boats, 13 Microgrocesoza Unisoto, 1.4
．． 15: RAM 116. 17: 1・, 31: ROM, 3
2 Printer device, 4o: Power supply circuit, 50: Computer main body side battery, 51: Constant voltage circuit, 5G peripheral device 1111
battery

Claims (1)

[Claims] 1. In an information processing device that is used by connecting a peripheral device that is equipped with a printer, a cassette interface, etc. to the computer main body, the power supply voltage of the peripheral device is supplied to the computer main body, A power supply system for an information processing device, characterized in that a constant voltage power source obtained within the main body is supplied to a predetermined circuit portion of the peripheral device.