CN206774112U - A kind of electronic calendar - Google Patents

Abstract

It the utility model is related to a kind of electronic calendar, circuit module during including control circuit module, display circuit module, clock circuit module, alarm clock circuitry module and school, the control circuit module are connected with circuit module when display circuit module, clock circuit module, alarm clock circuitry module and school respectively.The control circuit module selects AT89C51 chips, and the display circuit module selects LCD1602 chips, and the clock circuit module selects DS12887 chips.Electronic calendar provided by the utility model can to year, month, day, week, when, minute, second carry out timing; intuitively shown by display circuit module year, month, day, week, when, the information such as minute, second; simultaneously; time calibration and alarm clock setting can be also carried out by button, and there is power-down protection.

Description

A kind of electronic calendar

Technical field

It the utility model is related to a kind of electronic calendar.

Background technology

Perpetual calendar is that very extensive timing tool is applied in a kind of daily life.

Utility model content

Electronic calendar provided by the utility model based on 51 series single-chip microcomputers carry out design, can to year, the moon, Day, week, when, minute, second carry out timing, year, month, day, hour, min, second and all information are intuitively shown by display circuit module, is had Adjustable date and time function, it can also be set by button to carrying out time calibration and alarm clock, there are three key timing functions, break Electric protection function（When power-off is walked）And alarm clock buzzer prompt facility.The electronic calendar circuit structure is simple, cost is cheap, It is accurate timing, simple to operate, there is certain promotional value.

The utility model provides a kind of electronic calendar, including control circuit module, display circuit module, clock circuit mould Circuit module when block, alarm clock circuitry module and school, the control circuit module respectively with display circuit module, clock circuit mould Circuit module connects when block, alarm clock circuitry module and school.

The control circuit module selects AT89C51 chips.

The display circuit module selects LCD1602 chips.

The display circuit module is LCD liquid crystal display screen.

The clock circuit module selects DS12887 chips.

The control circuit module selects AT89C51 chips, and the display circuit module selects LCD1602 chips, described The P0.0 pins of AT89C51 chips, P0.1 pins, P0.2 pins, P0.3 pins, P0.4 pins, P0.5 pins, P0.6 pins, P0.7 pins, P2.7 pins, P2.6 pins, P2.5 pins connect respectively the D0 ends of LCD1602 chips, D1 ends, D2 ends, D3 ends, D4 ends, D5 ends, D6 ends, D7 ends, EN ends, RW ends, RS ends.

The control circuit module selects AT89C51 chips, and the clock circuit module selects DS12887 chips, described The P0.0 pins of AT89C51 chips, P0.1 pins, P0.2 pins, P0.3 pins, P0.4 pins, P0.5 pins, P0.6 pins, P0.7 pins, P3.2 pins, P3.5 pins, P3.6 pins, P3.7 pins, P2.3 pins connect DS12887 chips respectively AD0 ends, AD1 ends, AD2 ends, AD3 ends, AD4 ends, A D5 ends, AD6 ends, AD7 ends, IRQ ends, RD ends, RW ends, ALE ends, CS ends.

The control circuit module selects AT89C51 chips, during the school circuit module include three respectively with AT89C51 P2.0 pins, P2.1 pins, the button of P2.2 pins connection of chip.

The control circuit module selects AT89C51 chips, the alarm clock circuitry module include resistance, positive-negative-positive pipe with And buzzer, the P2.4 pins of the AT89C51 chips connect the base stage of positive-negative-positive pipe, the current collection of positive-negative-positive pipe by resistance Buzzer is connected between pole and ground.

Brief description of the drawings

Fig. 1 is the structure chart of electronic calendar provided by the utility model；

Fig. 2 is the circuit theory diagrams of electronic calendar provided by the utility model.

Embodiment

The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art The utility model can be better understood from and can be practiced, but illustrated embodiment is not as to restriction of the present utility model.

The utility model provides a kind of electronic calendar, as shown in figure 1, including control circuit module 1, display circuit module 2nd, circuit module 5 when clock circuit module 3, alarm clock circuitry module 4 and school.The control circuit 1 respectively with display circuit mould Circuit module 5 connects when block 2, clock circuit module 3, alarm clock circuitry module 4 and school.The control circuit module 1 is preferred AT89C51 chips, the preferred LCD1602 chips of display circuit module 2, the preferred DS12887 cores of clock circuit module 3 Piece.

As shown in Fig. 2 the specific connected mode between the control circuit module and display circuit module is as follows： The P0.0 pins of AT89C51 chips, P0.1 pins, P0.2 pins, P0.3 pins, P0.4 pins, P0.5 pins, P0.6 pins, P0.7 pins, P2.7 pins, P2.6 pins, P2.5 pins connect the D0 ends of LCD1602 chips respectively（Namely LCD1602's 7th pin）, D1 ends（Namely LCD1602 the 8th pin）, D2 ends（Namely LCD1602 the 9th pin）, D3 ends（Namely LCD1602 the 10th pin）, D4 ends（Namely LCD1602 the 11st pin）, D5 ends（Namely LCD1602 the 12nd pin）, D6 ends （Namely LCD1602 the 13rd pin）, D7 ends（Namely LCD1602 the 14th pin）, EN ends（Namely the 6th of LCD1602 the Pin）, RW ends（Namely LCD1602 the 5th pin）, RS ends（Namely LCD1602 the 4th pin）.

Specific connected mode between the control circuit module and clock circuit module is as follows：AT89C51 chips P0.0 pins, P0.1 pins, P0.2 pins, P0.3 pins, P0.4 pins, P0.5 pins, P0.6 pins, P0.7 pins, P3.2 Pin, P3.5 pins, P3.6 pins, P3.7 pins, P2.3 pins connect the AD0 ends of DS12887 chips respectively（Namely DS12887 the 4th pin）, AD1 ends（Namely DS12887 the 5th pin）, AD2 ends（Namely DS12887 the 6th pin）, AD3 ends （Namely DS12887 the 7th pin）, AD4 ends（Namely DS12887 the 8th pin）, A D5 ends（Namely the 9th of DS12887 the Pin）, AD6 ends（Namely DS12887 the 10th pin）, AD7 ends（Namely DS12887 the 11st pin）, IRQ ends（Namely DS12887 the 19th pin）, RD ends（Namely DS12887 the 17th pin）, RW ends（Namely DS12887 the 15th pin）、ALE End（Namely DS12887 the 14th pin）, CS ends（Namely DS12887 the 13rd pin）.Clock circuit module selects DS12887 During chip, the chip carries function when power-off is walked, and has the beneficial effect of power-off protection.

Circuit module includes three buttons being connected with control circuit module during the school.The control circuit module and school When circuit module between specific connected mode it is as follows：The P2.0 pins of AT89C51 chips, P2.1 pins, P2.2 pins difference Three buttons of circuit realize three key timings when connecting school, wherein the button R23 of connection P2.0 pins adjusts for selection time Or one of alarm time setting both of which, the function are to trigger connection chip microcontroller by button；Connection P2.1's presses Key R22 is used for increasing time value；Connection P2.2 button R21 is used for reducing time value, existing AT89C51 system core The programming of piece can realize the timing function of above three button.

The alarm clock circuitry module includes RM=10K resistance, transistor（Positive-negative-positive pipe, model 8550）And buzzing Device MK1.Specific connected mode between control circuit module and the alarm clock circuitry module is as follows：The P2.4 of AT89C51 chips Pin connects the Q1 ends i.e. positive-negative-positive pipe of alarm clock circuitry by connecting the resistance of 10K ohms（Model 8550）Base stage, positive-negative-positive Pipe（Model 8550）Emitter stage connection dc source, positive-negative-positive pipe（Model 8550）Colelctor electrode and ground between connect honeybee Ring device.The alarm clock buzzer prompt facility that alarm clock circuitry module is realized using transistor Q1 and buzzer MK1, reached in advance when the time Locking clock time, AT89C51 system chip P2.4 pins output low level, buzzer sounding, prompt time arrive.

The utility model is using AT89C51 chips as hardware core, and it uses Flash ROM, and inside has 4KB ROM Memory space, can be worked in 3V ultralow pressure, it is and completely compatible with MCS-51 series monolithics, using AT89S51 single-chip microcomputers as Control core, it has online programming function, and low-power consumption, can be worked in 3V ultralow pressures.In the utility model clock circuit by DS12887 chips provide, and are a kind of high-performance, low-power consumption, the real time clock circuit with RAM, it can be to year, month, day, week Day, when, minute, second carry out timing, there is leap year compensation function, and burst mode can be used once to transmit the clock of multiple bytes and believed Number or RAM data.DS12887 chip internals have the ram register for provisional storage data of one 31 × 8, can produce Year, month, day, Sunday, when, minute, second, have the characteristics that service life is long, precision is high and low-power consumption, while there is power down to protect automatically Deposit function.The display circuit module is LCD liquid crystal display screen, can specifically select LCD1602 chips, and LCD1602 chips are A kind of industrial character mode lcd element, can show 1602 i.e. 32 character simultaneously.

If the clock circuit module in the utility model does not use module individually, and directly uses single-chip microcomputer timer counter Device provides second signal, using program realize year, month, day, week, when, minute, second count, although it uses such a scheme to reduce core The use of piece and it is cost-effective, still, the time error of realization is larger, so this scheme is not used in the utility model, but Individually use DS12887 chips, DS12887 chips are a kind of high performance clock chips, can automatically to the second, point, when, day, week, Month, year and leap year compensation counted in year, and precision is high, the RAM of position as data working area, operating voltage 2.5V~ In the range of 5.5V, during 2.5V power consumption be less than 300nA.

DS12887 can also keep the continuous operation of clock in the case where main power source is closed.IBM AT can be used as to calculate The clock and calendar of machine and MC146818B and DS1287 pin compatibility in the case of no external power source can work for 10 years from With crystal oscillator and battery can calculate the second to before 2100, point, hour, week, the date, the moon, seven kinds of calendar informations of year simultaneously Band leap year compensation with binary code or binary-coded decimal represents calendar and alarm clock information has 12 and 24 hours two kinds of standards, 12 hours it is processed when Having AM and PM promptings can be selected, daylight-saving time pattern can apply to MOTOROLA and two kinds of bus data/address bus of INTEL are multiple The compatible interruption of square wave output bus is may be programmed with the general RAM of built-in 128 byte RAM word section clock-control register byte (/IRQ) three kinds of programmable Interrupt timeliness are interrupted can produce once per second until property interrupt cycle once a day is interrupted 122 ms to 500 ms clocks update end interrupt.

Embodiment described above is only the preferred embodiment to absolutely prove the utility model and being lifted, the utility model Protection domain not limited to this.The equivalent substitute or change that those skilled in the art are made on the basis of the utility model Change, within the scope of protection of the utility model.The scope of protection of the utility model is defined by claims.

Claims (7)

1. a kind of electronic calendar, it is characterised in that including control circuit module, display circuit module, clock circuit module, noisy Circuit module when clock circuit module and school, the control circuit module respectively with display circuit module, clock circuit module, noisy Circuit module connects when clock circuit module and school；

The control circuit module selects AT89C51 chips,

Circuit module is connected with the P2.0 pins, P2.1 pins, P2.2 pins of AT89C51 chips respectively including three during the school Button.

2. electronic calendar according to claim 1, it is characterised in that the display circuit module selects LCD1602 cores Piece.

3. electronic calendar according to claim 1, it is characterised in that the display circuit module is LCD liquid crystal displays Screen.

4. electronic calendar according to claim 1, it is characterised in that the clock circuit module selects DS12887 cores Piece.

5. electronic calendar according to claim 1, it is characterised in that the display circuit module selects LCD1602 cores Piece, the P0.0 pins of the AT89C51 chips, P0.1 pins, P0.2 pins, P0.3 pins, P0.4 pins, P0.5 pins, P0.6 pins, P0.7 pins, P2.7 pins, P2.6 pins, P2.5 pins connect respectively the D0 ends of LCD1602 chips, D1 ends, D2 ends, D3 ends, D4 ends, D5 ends, D6 ends, D7 ends, EN ends, RW ends, RS ends.

6. electronic calendar according to claim 1, it is characterised in that the clock circuit module selects DS12887 cores Piece, the P0.0 pins of the AT89C51 chips, P0.1 pins, P0.2 pins, P0.3 pins, P0.4 pins, P0.5 pins, P0.6 pins, P0.7 pins, P3.2 pins, P3.5 pins, P3.6 pins, P3.7 pins, P2.3 pins connect DS12887 respectively The AD0 ends of chip, AD1 ends, AD2 ends, AD3 ends, AD4 ends, AD5 ends, AD6 ends, AD7 ends, IRQ ends, RD ends, RW ends, ALE ends, CS ends.

7. electronic calendar according to claim 1, it is characterised in that the alarm clock circuitry module includes resistance, positive-negative-positive Pipe and buzzer, the P2.4 pins of the AT89C51 chips connect the base stage of positive-negative-positive pipe, positive-negative-positive pipe by resistance Colelctor electrode and ground between connect buzzer.