CN2891535Y

CN2891535Y - TV set with general-purpose real-time clock circuit

Info

Publication number: CN2891535Y
Application number: CNU2006200798506U
Authority: CN
Inventors: 曹建伟; 黄海华; 支运安; 王松丽; 陈世雷; 高金年; 梁智翔
Original assignee: Hisense Group Co Ltd; Qingdao Hisense Electronics Co Ltd
Current assignee: Hisense Group Co Ltd; Qingdao Hisense Electronics Co Ltd
Priority date: 2006-01-01
Filing date: 2006-01-01
Publication date: 2007-04-18
Anticipated expiration: 2016-01-01

Abstract

The utility model discloses a TV set with a general real-time clock circuit comprising a direct-current main and a time clock circuit which employs a serial clock chip, IIC bus terminal of the serial clock chip and interrupt signal output terminal are connecting with a standard interface module with 6 chips; IIC bus terminal of the serial clock chip and interrupt signal output terminal are signaling with the main board by the standard interface module. Supply terminal of the serial clock chip is connected with the direct-current main, backup power input terminal is connected with battery and the reference clock terminal is connected with external crystal-controlled oscillation. The time clock circuit realizes a general real-time clock circuit through a design of simple circuit structure and standard interface and facilitates extended application on a large number of TV sets, the TV set not only provides clock showing function, but also derives some functions as timing start-up, timing shutdown and program reservation, increasingly diversified needs of users can be satisfied and comparably high practicality are provided.

Description

Television set with general real time clock circuit

Technical field

The utility model relates to a kind of improvement of TV set circuit, specifically, relate to a kind of real-time clock universal circuit that in TV set circuit, increases, make existing TV set clock Presentation Function, and derive the control circuit of functions such as timing shutdown, timing start-up, displaying predetermined programme on this basis.

Background technology

Along with developing rapidly of television product, and the increase day by day of consumer demand, present television product has been endowed increasing additional function, and the real-time clock function is exactly one of them.Increasing the Real Time Clock Display function on television product can make the user grasp the current time easily on the one hand, the technical staff is matched clock circuit with other correlation functions of television set, develop functions such as timing start-up, timing shutdown, displaying predetermined programme, give conventional television with new function and purposes, made things convenient for user's daily use.The general complex structure of existing real-time clock of television control circuit, versatility are poor, can not be applicable to widely in the TV set circuit of various models.

Summary of the invention

The utility model is for the real-time timepiece control circuit complex structure that solves television set in the prior art, the problem of versatility difference, a kind of novel television set with general real time clock circuit is provided, realize the Presentation Function of real-time clock by designing relatively independent circuit, simultaneously, by adopting standard interface on the hardware and on software, realizing modularized design, reached maximum versatility and modular requirement, laid the foundation for this function is widely used in the various TV set circuit.

For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:

A kind of television set with general real time clock circuit, comprise DC power supply and clock circuit, described clock circuit adopts a serial clock chip to realize, the iic bus end of described serial clock chip is connected a standard interface module with the interrupt signal output, and carries out communication through described standard interface module and mainboard; The power end of described serial clock chip connects described DC power supply, and the back-up source input connects battery, and the reference clock end connects external crystal-controlled oscillation.

As further qualification to technique scheme, described standard interface module adopts a standard 6 core interfaces to realize, its 1 pin connects DC power supply, 2 pin, 6 pin ground connection, 3 pin connect the interrupt signal output of serial clock chip, and 4 pin, 5 pin connect the system clock end and the system data end of serial clock chip through iic bus.The voltage of described DC power supply is+3.3V, offers described clock circuit by 1 pin of mainboard by 6 core interfaces.

As the further qualification again to technique scheme, the model of described serial clock chip is DS1339, and its interrupt signal output connects described DC power supply through pull-up resistor.

Compared with prior art, advantage of the present utility model and good effect are: the utility model is realized the real-time clock function by adopting serial clock chip, and finish communication between clock circuit and the mainboard by 6 core interfaces of standard, with simple circuit configuration, standardized Interface design has realized a real time clock circuit with very big versatility, be convenient on a large amount of television sets, expand application, not only make television set have the clock Presentation Function, but also derived timing start-up on this basis, timing shutdown, functions such as displaying predetermined programme, satisfy the growing multiple demand of user, had advantages of high practicability.

Description of drawings

Fig. 1 is the schematic diagram of general real time clock circuit in the utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

Its nucleus module of clock circuit of the present utility model is the serial clock chip DS1339 that MAXIM company produces, and the interface of circuit module adopts 6 core interface CN315 of standard to realize that the concrete annexation of its circuit is referring to shown in Figure 1.

Among Fig. 1, the system clock end SCL of serial clock chip U602 and system data end SDA are connected 4,5 pin of 6 core interface CN315 through iic bus, the interrupt signal output SQW/INT of serial clock chip U602 connects 3 pin of 6 core interface CN315, and through pull-up resistor R615 connection+3.3V DC power supply, by the communication between described 6 core interface CN315 realization clock circuit and the mainboard.Described+3.3V DC power supply is provided by 1 pin of mainboard by 6 core interface CN315, provides working power for serial clock chip U602 when the television set operate as normal.The back-up source end VBACKUP of described serial clock chip U602 connects battery BT600, BT601 in parallel, when television set shuts down, relies on battery BT600, BT601 to keep clock circuit and work on.The crystal oscillator of the X1 of described serial clock chip U602, X2 end by 32.768KHZ obtains reference clock, and the mode by frequency division obtains more accurate clock signal in the inside of serial clock chip U602 and carries out timing.

When television set was started working, MCU set the initial value of serial clock chip U602 by iic bus, makes system time consistent with the current time.During operate as normal, serial clock chip U602 confirms the present real time by the value that iic bus reads related register.Simultaneously, MCU has confirmed whether to arrive the time that the user sets according to the interrupt signal of serial clock chip U602 feedback, thereby matches with software, has realized functions such as television set timing start-up, timing shutdown and displaying predetermined programme.

The utility model has been realized the Real Time Clock Display function of television set by adopting above-mentioned simple circuit configuration, and has satisfied the versatility and the modularization of clock circuit, has made things convenient for the expansion of clock circuit on television set to use.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.

Claims

1. television set with general real time clock circuit, comprise DC power supply and clock circuit, it is characterized in that: described clock circuit adopts a serial clock chip to realize, the iic bus end of described serial clock chip is connected a standard interface module with the interrupt signal output, and carries out communication through described standard interface module and mainboard; The power end of described serial clock chip connects described DC power supply, and the back-up source input connects battery, and the reference clock end connects external crystal-controlled oscillation.

2. the television set with general real time clock circuit according to claim 1, it is characterized in that: described standard interface module adopts a standard 6 core interfaces to realize, its 1 pin connects DC power supply, 2 pin, 6 pin ground connection, 3 pin connect the interrupt signal output of serial clock chip, and 4 pin, 5 pin connect the system clock end and the system data end of serial clock chip through iic bus.

3. the television set with general real time clock circuit according to claim 2 is characterized in that: the interrupt signal output of described serial clock chip connects described DC power supply through pull-up resistor.

4. the television set with general real time clock circuit according to claim 3 is characterized in that: the voltage of described DC power supply is+3.3V, is provided by 1 pin of mainboard by 6 core interfaces.

5. the television set with general real time clock circuit according to claim 4 is characterized in that: the model of described serial clock chip is DS1339.