CN201594258U

CN201594258U - Singlechip calculator

Info

Publication number: CN201594258U
Application number: CN200920316982XU
Authority: CN
Inventors: 王铎
Original assignee: Xian University of Technology
Current assignee: Xian University of Technology
Priority date: 2009-12-10
Filing date: 2009-12-10
Publication date: 2010-09-29
Anticipated expiration: 2019-12-10

Abstract

The utility model discloses a singlechip calculator which comprises a singlechip; and a keyboard, an RS-232 interface, a nixie tube and a buzzer are connected on the singlechip. The singlechip calculator solves the problem that existing calculators can not upgrade the program after purchase.

Description

The single-chip microcomputer counter

Technical field

The utility model belongs to the counter technical field, relates to a kind of single-chip microcomputer counter.

Background technology

Present counter is as the hand-held machine that can perform mathematical calculations, have integrated circuit (IC) chip, simple in structure, much more simple in structure than modern computer, can be described as the robot calculator of the first generation, it is convenient and cheap, can be widely used in the business transaction, also can be considered to one of indispensable office appliance.But existing counter function after buying just has cured, and can't carry out the upgrading of program to it.

Summary of the invention

The purpose of this utility model provides a kind of single-chip microcomputer counter, has solved the problem that can't upgrade to program after buying in the existing counter.

The technical scheme that the utility model adopted is, a kind of single-chip microcomputer counter comprises single-chip microcomputer, is connected with keyboard, RS-232 interface, charactron and hummer on the single-chip microcomputer, wherein,

Keyboard, the input of computing information when being used to use,

RS-232 interface is used for the upgrading of program is upgraded,

Single-chip microcomputer is used to handle the information of input and exports charactron and hummer after treatment to,

Charactron is used to show the computing information and the result of calculation of input,

Hummer, the auditory tone cues when being used to import computing information and output result of calculation.

Characteristics of the present utility model also are,

Keyboard wherein is the 4*5 matrix keyboard.

Single-chip microcomputer is wherein selected the AT89S52 chip for use.

Charactron wherein is 8 charactrons.

The beneficial effects of the utility model are, owing to the minimum system based on the AT89S52 single-chip microcomputer, so simple in structure, light.The RS-232 interface that is provided with can continue to optimize program, the raising operation efficiency to renewals of upgrading of the embedded program of single-chip microcomputer.

Description of drawings

Fig. 1 is the structural representation block diagram of the utility model single-chip microcomputer counter.

Among the figure, 1. keyboard, 2.RS-232 interface, 3. single-chip microcomputer, 4. charactron, 5. hummer.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The disclosed a kind of single-chip microcomputer counter of the utility model comprises single-chip microcomputer 3 as shown in Figure 1, is connected with keyboard 1, RS-232 interface 2, charactron 4 and hummer 5 on the single-chip microcomputer 3, wherein,

Keyboard 1, the input of computing information when being used to use,

RS-232 interface 2 is used for the upgrading of program is upgraded,

Single-chip microcomputer 3 is used to handle the information of input and exports charactron 4 and hummer 5 after treatment to,

Charactron 4 is used to show the computing information and the result of calculation of input,

Hummer 5, the auditory tone cues when being used to import computing information and output result of calculation.

Keyboard 1 wherein is the 4*5 matrix keyboard.

Single-chip microcomputer 3 is wherein selected the AT89S52 chip for use.

Charactron 4 wherein is 8 charactrons.

The course of work of the present utility model is, when needs calculate, the user inputs to single-chip microcomputer 3 with calculative information by keyboard 1, charactron 4 shows the computing information of input simultaneously, hummer 5 is sounded the computing information of input is pointed out, 3 pairs of computing informations of being imported of single-chip microcomputer are handled the back and are shown by charactron 4, hummer 5 prompting of sounding simultaneously.When needs upgradings refresh routine, be connected with the upstream computing machine by RS-232 interface 2, the renewal of upgrading of the embedded program of single-chip microcomputer 3.

Claims

1. a single-chip microcomputer counter is characterized in that, comprises single-chip microcomputer (3), is connected with keyboard (1), RS-232 interface (2), charactron (4) and hummer (5) on the single-chip microcomputer (3), wherein,

Keyboard (1), the input of computing information when being used to use,

RS-232 interface (2) is used for the upgrading of program is upgraded,

Single-chip microcomputer (3) is used to handle the information of input and exports charactron (4) and hummer (5) after treatment to,

Charactron (4) is used to show the computing information and the result of calculation of input,

Hummer (5), the auditory tone cues when being used to import computing information and output result of calculation.

2. single-chip microcomputer counter according to claim 1 is characterized in that, described keyboard (1) is the 4*5 matrix keyboard.

3. single-chip microcomputer counter according to claim 1 is characterized in that, described single-chip microcomputer (3) is selected the AT89S52 chip for use.

4. single-chip microcomputer counter according to claim 1 is characterized in that, described charactron (4) is 8 charactrons.