KR20070094323A - Communication system detecting type of battery state signal - Google Patents

Abstract

A communication system for detecting a state signal of a battery is provided to reduce a manufacturing cost by performing a battery state monitoring function through an external circuit. A power source unit includes a battery for supplying electric power. A processor includes a clock signal output terminal and a data input terminal in order to analyze batter state information. An interface circuit(120) receives a clock signal from the clock signal output terminal, synchronizes a power signal of the battery with the clock signal of the clock signal output terminal in order to output a digital signal, and transmits the digital signal to the data input terminal. The interface circuit transmits data to and receives the data from the clock signal output terminal and the data input terminal through a 12C communication link.

Description

Communication system detecting type of battery state signal

1 is a block diagram schematically showing the components of a battery status signal detection communication system according to an embodiment of the present invention;

2 is a diagram illustrating the terminal pin type of the processor of the battery status signal detection communication system according to an embodiment of the present invention.

3 is a circuit diagram schematically showing components of an interface circuit of a battery status signal detection type communication system according to an embodiment of the present invention.

4 is a block diagram schematically illustrating components of a display apparatus of a battery state signal detecting communication system according to an exemplary embodiment of the present invention.

5 is a diagram illustrating a screen on which a display device of a battery status signal detection type communication system according to an embodiment of the present invention displays battery status information.

<Explanation of symbols for main parts of drawing>

100: Battery status signal detection type communication system

110: power supply unit 120: interface circuit

121: A / D converter A: Clock signal output terminal

B: Data input terminal C: Clock signal input terminal

D: Digital signal output terminal E, G: Power terminal

F: Battery connector 122, 123: Voltage distribution resistor

124: DC blocking capacitor 125: pullup resistor

130: processor 140: display device

141: DAC 142: TCON

143: data driving module 144: gate driving module

The present invention relates to a battery status signal detection type communication system.

Currently, various mobile communication terminal products such as mobile phones, smartphones, PDAs (Personal Digital Assistants), notebooks, music phones, and DMB (Digital Multimedia Broadcasting) phones are being developed, and mobile communication terminal products have various functions. Many products equipped with various communication modules have been released.

Examples of such communication modules include a CDMA communication module, an infrared communication module, a Zigbee communication module, and a Bluetooth communication module.

Meanwhile, attention is focused on Bluetooth communication as one of the short range wireless communication methods. Bluetooth refers to a communication standard capable of transmitting and receiving data using a frequency of 2.4 GHz band in a short range of about 10 m to 100 m. The communication standard includes a contracted standard for handling crosstalk that occurs when the same frequency is used or for identification between devices.

The Bluetooth has a very wide range of applications, and can be used for connection between a computer and a peripheral device, a mobile communication terminal, headphones, an access card, a venue broadcasting, an instrument control, a handset connection, a local area network, and two-way communication. The range of use is expected to increase in the future due to the advantages such as having the ability to connect a large number of devices.

Taking a Bluetooth module as an example, various kinds of main chips (processors) may be installed inside the main chips, which are different in function and price depending on the product.

For example, as a multimedia chip that can be used in a Bluetooth module, CSR's "BC3MM" product has an internal A / D and D / A converter function, while equipped with a liquid crystal display (LCD) display control function. Not.

In addition, as a multimedia chip that can also be used in the Bluetooth module, Broadcom's "zv4301" product can be used to implement Bluetooth stereo function, which is equipped with an LCD display control function, while A / D, It does not have a D / A converter function.

Therefore, the "zv4301" product has a disadvantage in that it cannot display the battery status information even when the battery is connected to the terminal even though the battery is used in the Bluetooth module to implement the LCD display.

As an example, many communication module products used in a communication system are differentiated from each other according to their functions. Therefore, in order to implement various functions, all the corresponding products must be provided. For this reason, the volume of the communication system is increased and the circuit configuration is increased. This becomes complicated and there is a problem that the production cost is high.

According to the present invention, when a chip product without A / D and D / A converting functions is to be used, battery state information can be detected by providing an external circuit instead of another chip product. The present invention provides a battery status signal detection type communication system for displaying.

The battery state signal detection type communication system according to the present invention includes a power supply unit for supplying power by mounting a battery; A processor having a clock signal output terminal and a data input terminal and interpreting battery state information; And an interface circuit for receiving a clock signal from the clock signal output terminal, converting a power signal transmitted from the battery into a digital signal in synchronization with the clock signal, and transferring the converted digital signal to the data input terminal. do.

In addition, the interface circuit provided in the battery status signal detection type communication system according to the present invention transmits and receives data with the clock signal output terminal and the data input terminal of the processor through I2C communication.

In addition, the interface circuit provided in the battery status signal detection type communication system according to the present invention communicates with the processor through a 100 kHz I2C communication mode or a 400 kHz I2C communication mode.

In addition, the processor of the battery state signal detection type communication system according to the present invention, when the digital signal is input, interprets the battery state information, outputs the analyzed battery state information, and the battery state signal detection type communication according to the present invention. The system further includes a display device for receiving the interpreted battery state information and displaying it in a predetermined display format.

In addition, the interface circuit of the battery status signal detection type communication system according to the present invention is implemented as an A / D converter circuit.

In addition, the A / D converter circuit provided in the battery state signal detection type communication system according to the present invention includes a clock signal input terminal connected to the clock signal output terminal, a digital signal output terminal connected to the data input terminal, and the power supply unit. Analog signal input terminal and power input terminal connected to the.

Hereinafter, a battery status signal detection type communication system according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. The communication system according to the exemplary embodiment of the present invention is a Bluetooth communication system.

1 is a block diagram schematically illustrating the components of a battery status signal detection type communication system 100 according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a battery state signal detecting communication system 100 according to an exemplary embodiment of the present invention includes a power supply unit 110, an interface circuit 120, a processor 130, and a display device 140. The processor 130 has a Bluetooth stereo function, an LCD display function, etc., but is not equipped with A / D converting and D / A converting functions. In an embodiment of the present invention, the processor 130 may include Broadcom's " zv4301 "shall be used.

The "zv4301" chip is a wireless audio application chip used for wireless stereo headphones, a headset, a plug and play dongle (a kind of external input / output device), and operates from 12 MHz to 48 MHz, and has synchronous dynamic random access (SDRAM). Memory) is built in.

The processor 130 controls a network link and executes an application application to process digital signals.

The Bluetooth specification describes interoperability with link managers, service discovery protocols, transport layer protocols, and other communication protocols (protocols embedded in other devices). The control unit manages these protocols, profiles, and procedures.

The controller also includes a memory (not shown) to store data related to a protocol, profile, procedure, etc. according to the Bluetooth standard. In addition, the memory stores application applications and provides a storage space for data processed by the controller.

The power supply unit 110 includes an accommodating part, a back bakery protection circuit, a stabilization circuit and the like (not shown separately in the components of the power supply part 110), the accommodating part mounts a battery, and the battery protection circuit is in an overcharge state. It protects the battery by blocking / supplying the current by identifying the over-discharge state, over-current state, and blackout discharge state.

In addition, the stabilization circuit is a circuit for converting and supplying the power of the battery to a stable power of a predetermined value used in the communication system 100.

The interface circuit 120 is connected to the power supply unit 110 and the processor 130, and includes a clock signal input terminal and a digital signal output terminal, respectively, and is connected to the clock signal output terminal and the data input terminal of the processor 130, respectively. A battery connection terminal is provided to be connected to the power supply unit 110.

The interface circuit 120 receives a clock signal from a clock signal output terminal and converts a power signal transmitted from a battery into a digital signal in synchronization with the clock signal.

When the power signal is converted into a digital signal, the interface circuit 120 transmits the digital signal to the data input terminal of the processor 130, and the processor 130 interprets the digital signal to generate battery state information.

In addition, the processor 130 transmits the generated battery status information to the display device 140, and the display device 140 displays the battery status information on a screen.

2 is a diagram illustrating the terminal pin type of the processor 130 of the battery state signal detection type communication system 100 according to an embodiment of the present invention.

The processor (zv4301 chip) 130 according to the present invention includes an external bus line interface, an interrupt controller, a universal asynchronous receiver / transmitter (UART), a pulse code modulation (PCM) signal processing module, and a programmable input / output (PIO) control. It consists of a module, a universal serial bus (USB) interface, a stateful packet inspection (SPI) module, and the like, and internal circuits exchange signals with external circuits through terminal pins exposed to the outside of the package of the processor 130.

Referring to FIG. 2, the processor 130 forms a plurality of terminal pins 11, 12, 13, 14, and 15. Referring to the main terminal pins, first, a synchronization processing terminal and input / output of a PCM signal are described. Terminal, clock terminals 11, and second, terminals 12 associated with PIO data.

For reference, the PIO is a high-speed data transmission standard proposed by the US Seagate Corporation. For example, according to this standard, when the data on the buffer is transferred to the peripheral device, the processor 130 intervenes to control the transmission. The PIO has a mode of "0 mode" having a speed of 3.3 MB / s, a "mode 1" having a speed of 5.2 MB / s, a "mode 2" having a speed of 8.3 MB / s, and a speed of 11.1 MB / s. "3 modes" and "4 modes" with a speed of 16.6 MB / s.

Third, the processor 130 includes terminal pins 13 related to the oscillation frequency signal, and fourth, terminal pins 14 for inputting and outputting audio data, and fifth, terminal pins 15 for general data are allocated. have.

Among the terminal pins 11 associated with the PCM signal, the clock signal output terminal A is connected to the clock signal input terminal (FIG. 3; C) of the interface circuit 120 to provide a clock signal, and the terminal associated with the PIO data. The data input terminal B of the pin 12 is connected to the digital signal output terminal (FIG. 3; D) of the interface circuit 120 to receive the battery state information converted into a digital signal.

At this time, the interface circuit 120 and the processor 130 transmits and receives a signal through an I2C method. The I2C method is a transmission line mainly used for control, and can control a large number of chips in parallel using only two lines. Can be.

Information included in the I2C signal includes a synchronization clock, address, data, data start / stop information, and the transmission speed can be as low as 100kbps to 400kbps. The interface circuit 120 and the processor 130 each have a unique address (7 bits) and can transmit and receive bidirectionally.

In addition, the processor 130 and the interface circuit 120 may transmit and receive a signal in a 100 kHz I2C communication mode or a 400 kHz I2C communication mode. It is preferable.

3 is a circuit diagram schematically showing the components of the interface circuit 120 of the battery status signal detection communication system 100 according to an embodiment of the present invention.

The interface circuit 120 is a kind of A / D converter circuit, for example, a converter chip 121 such as “MCP3221” may be used, and the processor 130 and the power supply unit 110 may include a circuit as shown in FIG. 3. Connected with

The interface circuit 120 includes two power terminals G and E, a clock signal input terminal C, a digital signal output terminal D, and a battery connection terminal F. The first power terminal G Is a terminal for supplying driving power to the converter chip 121, the second power supply terminal (E) is a terminal for supplying power to the pull-up resistor (125).

The battery connection terminal F is connected to the power supply unit 110 to receive a power signal. The power signal is a converter chip 121 through a power distribution circuit in which the first resistor 122 and the second resistor 123 are connected in parallel. ) Is adjusted to the operating power value.

The first power terminal G is connected through the ground terminal and the capacitor 124 to block the DC signal (or the digital signal) from flowing backward from the converter chip 121.

As described above, the clock signal input terminal C and the digital signal output terminal D are connected to the clock signal output terminal A and the data input terminal B of the processor 130, respectively. In order to prevent the processor 130 from malfunctioning when the voltage stays at an intermediate state, the pull-up resistors 125 connected to the second power supply terminal E are provided.

4 is a block diagram schematically illustrating components of the display apparatus 140 of the battery state signal detecting communication system 100 according to an exemplary embodiment of the present invention, and FIG. 5 is a battery state according to an exemplary embodiment of the present invention. The display apparatus 140 of the signal detection type communication system 100 is a diagram illustrating a screen on which battery state information is displayed by way of example.

Referring to FIG. 4, the display device 140 includes a digital to analog converter (DAC) 141, a time controller (TCON) 142, a data driving module 143, a gate driving module 144, and an LCD 145. The DAC 141 and the TCON 142 are connected to the processor 130 to receive a display control signal and display data.

When the digital signal is transmitted from the interface circuit 120, the processor 130 interprets this as battery state information and generates battery state indication information based on the analyzed battery state information.

In this case, the processor 130 compares the analyzed battery state information with preset battery reference information to determine how much current battery remaining capacity is, and generates battery state display information.

The data driving module 143 and the gate driving module 144 are connected to the LCD 145 as components for transmitting a driving signal.

The TCON 142 generates a time signal and performs a function of aligning an input image pattern signal or an image signal, and provides a time signal to the gate driving module 144 and the data driving module 143.

The DAC 141 converts the battery state indication information (which may be full screen data including the battery state indication information), which is a digital signal state, into an analog signal and transmits the converted signal to the data driving module 143.

The data driving module 143 sequentially applies the battery state display information converted into an analog signal on the x-axis line of the LCD matrix, and the gate driving module 144 is a transparent display electrode (TFT-array) on the y-axis line. Gate voltage is applied.

Through this operation, as shown in FIG. 5, the battery state display information may be displayed on the LCD window.

Although the present invention has been described above with reference to the embodiments, these are only examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains may have an abnormality within the scope not departing from the essential characteristics of the present invention. It will be appreciated that various modifications and applications are not illustrated. For example, each component specifically shown in the embodiment of the present invention can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

According to the battery state signal detection type communication system according to the present invention, the battery state monitoring function can be implemented through an external circuit without having to separately provide another chip product, thereby reducing the production cost of the communication module product.

In addition, according to the present invention, since external circuits can be implemented using terminals that are not used among the terminals of the conventional chip products, the external circuits can be implemented without complexity, the number of parts can be reduced, and hardware resources can be efficiently There is an advantage to use.

Claims (9)

A power supply unit for supplying power by mounting a battery; A processor having a clock signal output terminal and a data input terminal and interpreting battery state information; And An interface circuit receiving a clock signal from the clock signal output terminal, converting a power signal transmitted from the battery into a digital signal in synchronization with the clock signal, and transferring the converted digital signal to the data input terminal; Battery status signal detection type communication system. The method of claim 1, wherein the interface circuit Battery status signal detection type communication system, characterized in that for transmitting and receiving data through the I2C communication with the clock signal output terminal and the data input terminal of the processor. The method of claim 2, wherein the interface circuit A battery status signal detection type communication system, characterized in that communication with the processor via a 100 kHz I2C communication mode or 400 kHz I2C communication mode. The method of claim 1, When the digital signal is input, the processor interprets the battery state information and outputs the analyzed battery state information. And a display apparatus for receiving the analyzed battery state information and displaying the battery state information in a predetermined display format. The method of claim 1, wherein the interface circuit Battery status signal detection type communication system, characterized in that implemented by the A / D converter circuit. 6. The circuit of claim 5, wherein the A / D converter circuit Battery status signal detection type comprising a clock signal input terminal connected to the clock signal output terminal, a digital signal output terminal connected to the data input terminal, an analog signal input terminal connected to the power supply unit, and a power input terminal Communication system. The method of claim 6, wherein the analog signal input terminal The battery state signal detection type communication system, characterized in that the power distribution circuit is further provided so that the power signal of a predetermined voltage is connected to the power supply unit. The method of claim 6, wherein the power input terminal And a DC signal blocking device to prevent the digital signal from flowing back to the outside. The terminal of claim 6, wherein the clock signal input terminal or the digital signal output terminal A battery status signal detection type communication system having a pull on resistance.

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