CN1194410A - Multifunctional calculator - Google Patents

Abstract

The calculator consists of casing, keyboard, display, ICs and power source; its ICs include monochip computer, display driver, expanded interface and memory and the display is dot type LCD module; and data and calculation formula are cured in memory as processing software. It has the advantages of high reliability, high efficiency and convenience in operation, and it can display the whole calculation course including corrected one, display various metric units and convert unit by moving the cursor to required unit.

Description

Multifunctional calculator

The invention belongs to a kind of counter.

There is following defective in present various counter:

1, the data of having only input or the result calculated that show in the display, and can not show computation process, if computation process is wrong can not be revised, thereby the poor reliability of its result of calculation;

2, the data of data of storing in its reservoir and input can not show simultaneously;

3, can not carry out automatic conversion between the various measurement units commonly used.

Above problem often runs in engineering design, and existing counter is just powerless to these problems.

The objective of the invention is to: provide a kind of and show, proofread, revise whole computation process, and can show that data reach the multifunctional calculator that carries out the measurement unit conversion automatically in the reservoir.

The present invention is achieved in that it by shell (1), keyboard (2), and display (3), integrated circuit (4), power supply (5) is formed; Integrated circuit (4) comprises single-chip microcomputer, display driver, and expansion interface, storer, display (3) adopts the lattice liquid crystal module; Display device (3) is connected with single-chip microcomputer by expansion interface with keyboard (2) and the process software of data information, mathematical operation formula is solidificated in the storer.

The present invention compared with prior art has result of calculation reliability height, high efficiency, advantage such as easy to operate.When carrying out digital computation, numeral and sign of operation are imported by keyboard, display shows whole computation process, at this moment can make amendment to computation process, and available cursor movement key or roll screen key show because the long character that shows at last screen of failing of formula; Also can show the data in result of calculation and computing formula and the reservoir simultaneously; When carrying out measurement unit when converting, only need by corresponding key, display will show measurement units such as length, area, volume, power, pressure, moving cursor can carry out the measurement unit conversion by corresponding key again to needing the exchangeable bases place.

Accompanying drawing 1 is an outside drawing of the present invention;

Accompanyingdrawing 2 is a work block diagram of the present invention;

Accompanyingdrawing 3 is embodiments of the invention figure.

Embodiments of the invention: the single-chip microcomputer of integrated circuit (4) is with 8031, and expansion interface is 8255, and storer is 27256, and the dot matrix display of built-in drive (3) adopts MGLS-240128, and crystal oscillator is XXITL, and power supply (5) is V₆₄₀Display (3) is connected with single-chip microcomputer 8031 by expansion interface 8255 with keyboard (2), storer 27256 is connected with single-chip microcomputer 8031 data sums, address bus by data latches, the process software of the data information of various measurement units, mathematical operation formula is solidificated in the storer 27256, single-chip microcomputer 8031 external crystal oscillating circuit XXITL, add power supply (5), above each parts installation is welded on the circuit board, in the shell of packing into (1).

Claims (1)

1, a kind of multifunctional calculator, it is by shell (1), keyboard (2), display (3), integrated circuit (4), power supply (5) is formed; Integrated circuit (4) comprises single-chip microcomputer, display driver, and expansion interface, storer is characterized in that: display (3) adopts the lattice liquid crystal module; Display device (3) is connected with single-chip microcomputer by expansion interface with keyboard (2); And the process software of data information, mathematical operation formula is solidificated in the storer.

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