KR100476070B1 - Apparatus for interfacing between game terminal and computer - Google Patents

Abstract

The present invention relates to an interface device of a game terminal capable of communicating with a host computer, wherein the interface device of the game terminal has a polarity between an internal operating potential and a second polarity having a first polarity higher than the operating power and a second polarity having a negative potential. a half-duplex operation at at least two potentials including a bipolar communication potential, and a communication potential of the first polarity in an inactive state among signal lines used as a control signal / data signal line of the host computer. A first communication power supply including a first capacitor connected to a first signal line having a + VEE, and a communication potential of the second polarity in an inactive state among the signal lines used as a control signal / data signal line of the host computer; A second communication power supply including a second capacitor connected to a second signal line having a VEE, and the first communication power supply And an amplifying stage for biasing the second communication power supply, wherein the amplifying stage amplifies the level of the data transmission signal from the game terminal and transmits the level to the host computer through the third signal line. By including a data receiving unit for attenuating the level of the data transmission signal transmitted from the host computer to be transmitted to the game terminal, there is no need for a separate power conversion module, and has a useful effect of connecting the game terminal to the computer with minimal cost.

Description

Apparatus for interfacing between game terminal and computer}

The present invention relates to an interface device, and more particularly, to an interface device used in a game terminal to enable a game terminal to connect with an external computer for communication.

Conventional game terminals that can be performed offline can be freely enjoyed by children anytime and anywhere, which is sufficient to attract children's interest. Recently, new games are being developed as online games available for children are developed. Online games have come up with many ideas for exciting games, including various items and map information, which is a wide range of game background information.

In recent years, attempts have been made to improve the utility of game terminals by reflecting the results of games obtained by connecting the game terminal that can be executed offline to the computer and executing it offline, for example, scores, rankings, and items in online games. It is becoming.

Conventionally, the communication interface that can be simply implemented for communication between a game terminal and a computer can be various communication means such as an RS-232c port, a USB port, and an infrared port (IR).

However, when the game terminal is connected to the computer using the interface, the operating cost of the terminal, i.e., a power conversion chip that converts 3.3V or 5V into 12V, must be used for communication with the host computer. There is a problem that rises.

Accordingly, an object of the present invention is to provide an external interface device of a game terminal capable of connecting a game terminal to a computer at a minimum cost without requiring a separate power conversion module as proposed to solve the above problems.

According to an aspect of the present invention for achieving the above object, the present invention is an external interface device of a game terminal capable of communicating with a host computer,

The external interface device of the game terminal:

Operates in a half-duplex manner at at least two potentials including a bipolar communication potential between an internal operating potential and a first polarity higher than this operating power source and a second polarity having a negative potential,

A first communication power supply including a first capacitor connected to a first signal line having a communication potential (+ VEE) of the first polarity in an inactive state among signal lines used as a control signal / data signal line of the host computer;

A second communication power supply including a second capacitor connected to a second signal line having a communication potential (-VEE) of the second polarity in an inactive state among signal lines used as a control signal / data signal line of the host computer;

And an amplifying stage configured to bias the first communication power supply and the second communication power supply, and amplifying a level of a data transmission signal from the game terminal and transmitting the amplified level to a host computer through a third signal line. Wow;

A data receiver which attenuates the level of the data transmission signal from the host computer transmitted through the fourth signal line and transmits the level to the game terminal;

Characterized in that it comprises a.

According to this aspect, the game terminal can connect the game terminal to the host computer at a simple and minimal cost without requiring a separate power conversion module.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

1 is a block diagram of an external interface device of a game terminal according to a preferred embodiment of the present invention, Figure 2 is a circuit diagram of an external interface device of a game terminal according to a preferred embodiment of the present invention.

Although the present embodiment is based on the RS-232 communication protocol, the present invention is not limited thereto and may be generally applied to a communication protocol employing a communication potential different from that of an internal operating power source.

As shown, in the preferred embodiment of the present invention, the external interface device of the game terminal of the RS-232 serial port of the host computer signal line (RXD) for receiving the output signal of the game terminal is connected to the second pin, Ready to send data from the host computer to the game terminal. The signal line (RTS) is connected to pin 7, the output signal line (TXD) from the host computer is connected to pin 3, and the ground (GND) signal line is connected to pin 5. do.

In the present embodiment, the interface device of the game terminal can interface the communication between the game terminal and the host computer using four signal lines (GND, RXD, TXD, RTS). That is, when the host computer does not transmit data, the communication potential of the output signal line TXD on the host computer side is low (-12V), so that the communication potential supplied to the transmission ready signal line RTS is set to the first communication potential (+ 12V). Therefore, communication is possible by setting the communication potential supplied to the output signal line TXD on the host computer side as the second communication potential (-12V). In this case, when transmitting data from the game terminal to the host computer, the output signal line TXD of the host computer must supply the second communication potential, and thus the host computer cannot transmit data, thereby communicating in a half-duplex manner. In this case, since the data transmitted and received by the game terminal to and from the host computer is small and low speed, the half duplex method is not a problem.

In another embodiment of the present invention, the interface device of the game terminal may connect a signal line indicating the terminal preparation completion (DTR) to the game terminal from the host computer among the RS-232 serial ports of the host computer to pin 4 and the four signal lines ( It is possible to interface communication between a game terminal and a host computer using GND, RXD, TXD, and DTR. That is, it is possible to communicate in a half-duplex manner by using the terminal ready signal line DTR as the first communication potential (+ 12V) instead of the transmission ready signal line RTS.

As another embodiment of the present invention, the interface device of the game terminal can interface the communication between the game terminal and the host computer using five signal lines (GND, RXD, TXD, RTS, DTR). At this time, the communication between the game terminal and the host computer controls the one of the RTS and the DTR to the first communication potential (+ 12V) and the other to the second communication potential (-12V), thereby bypassing the communication potential in the game terminal. Full duplex communication is possible by using as a bias power source.

However, according to an advantageous aspect of the present invention, it is preferable that the interface device of the game terminal interface the communication between the game terminal and the host computer using four signal lines. As described above, since the interface device of the game terminal is implemented with 4 pins, the manufacturing cost is significantly reduced, and the general 4 pin (pin) jack (headphone jack) can be used as a connector.

As shown in Fig. 1 and Fig. 2, the external interface device 1 of the game terminal according to the present invention includes a data transmitter 10, a data receiver 20, a first communication power supply 30 and a second communication power. Supply part 40 is included.

The data transmitter 10 includes a plurality of resistors R1, R2, R3, R4, and R5 and first and second transistors Q1 and Q2 to transmit data from the game terminal to the host computer.

The first transistor Q1 is connected to the data transmission signal line of the game terminal by an emitter, the base is grounded through the resistor R3, and the collector is connected to the second polar potential -VEE through the resistor R5. . At this time, the internal operating power supply VCC of the game terminal is supplied through the resistor R1 to one side of the emitter of the first transistor Q1.

The base of the second transistor Q2 is connected to the collector of the first transistor Q1 through a resistor R4 and the emitter is connected to the second polar potential -VEE and the collector is connected to the resistor R2 through a resistor R2. 1 It is connected to the polarity potential (+ VEE).

The data transmitter 10 may bias the first communication power supply 30 and the second communication power supply 40 into a high output voltage capable of driving a host computer with a low output voltage from a game terminal. Amplify.

The data receiver 20 includes a plurality of resistors R6 and R7 and a third transistor Q3 to receive data from the host computer and transmit the data to the game terminal.

The resistor R7 is connected to the data output signal line of the host computer to drop the voltage of the data signal.

The third transistor has a base connected to the resistor R7, an emitter grounded, and a collector connected to a data receiving signal line of the game terminal. At this time, one side of the collector of the transistor Q3 is connected to the internal operating power supply through the resistor R6.

The first communication power supply 30 includes a capacitor C1 connected to a signal line having a first polar potential (+ VEE), that is, + 12V, in an inactive state among the interface signal lines with a host computer.

The second communication power supply 40 includes a second capacitor connected to a signal line having a second polar potential (-VEE), that is, -12 V in an inactive state among the interface lines with the host computer.

As described above, the present invention can minimize the manufacturing cost of the game terminal by manufacturing an interface circuit that can be connected to a computer using only a plurality of resistors and capacitors without a separate power conversion module.

Hereinafter, the operation of the interface device of the game terminal according to the present invention with reference to Figs.

The core of the operation of the interface device of the game terminal according to the present invention is to make the communication method half duplex. When data is transmitted from the game terminal to the host computer, the potential supplied to the receiving end signal line is used as the second polar potential (-VEE). To this end, the host computer side must maintain the signal line of the transmitting end (game machine receiving end) in such a state that the communication potential can be supplied.

As shown in Fig. 2, the output of the data transmission signal TXD of the host computer is in the state of being separated by the second polar potential (-VEE) when the host computer is not transmitting the data signal to the game terminal.

First, an operation in the case where data is transmitted from the game terminal to the host computer will be described.

When data is output from the game terminal, when the high (3V) signal from the game terminal is applied to the emitter of the first transistor Q1, the first transistor Q1 is turned on and is turned on through the resistor R4. The signal of the high (3V) state is applied to the base of the two transistors Q2. Therefore, the second transistor Q2 is turned on so that the signal detected at the potential level of the collector, that is, at the receiving terminal RXD of the host computer, becomes low (-12V).

When the low (0V) signal from the game terminal is applied to the emitter of the first transistor Q1, the first transistor Q1 and the second transistor Q2 are turned off, and the resistance R2 causes the host computer to turn off. The signal detected at the receiving terminal RXD is high (12V).

A case where data is transmitted from the computer to the game terminal will be described.

When the data transmission signal TXD is output from the host computer, when the high 12V from the host computer is applied to the base of the third transistor Q3, the third transistor Q3 is turned on to receive the game terminal. The signal detected at the terminal RXD goes low (0V). When the output signal from the computer is low (0V), the third transistor Q3 is turned off and the signal detected by the resistor R6 at the receiving terminal RXD of the game terminal becomes high (3V).

The interface device of the game terminal according to the present invention having the above configuration enables the communication between the game terminal and the host computer by connecting the offline game terminal to the host computer.

 As described above, the interface device of the game terminal according to the present invention is useful to minimize the manufacturing cost of the game terminal because the power circuit is composed only of cheap electric elements that can maintain the host computer side power without using a power conversion chip. Has an effect.

In addition, the interface device between the game terminal and the computer according to the present invention is implemented by the 4-pin (Pin) to significantly reduce the manufacturing cost and also has the advantage that can use a general 4-pin (pin pin jack) (headphone jack) as a connector .

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, it should be interpreted by the claims described to include many such variations.

1 is a block diagram of an external interface device of a game terminal according to the present invention.

2 is a circuit diagram of an external interface device of a game terminal according to the present invention.

<Brief Description of Drawings>

1: Interface circuit

10: data transmission unit

20: data receiving unit

30: first communication power supply

40: second communication power supply

Claims (4)

An external interface device of a game terminal capable of communicating with a host computer, The external interface device of the game terminal: Operates in a half-duplex manner at at least two potentials including a bipolar communication potential between an internal operating potential and a first polarity higher than this operating power source and a second polarity having a negative potential, A first communication power supply including a first capacitor connected to a first signal line having a communication potential (+ VEE) of the first polarity in an inactive state among signal lines used as a control signal / data signal line of the host computer; A second communication power supply including a second capacitor connected to a second signal line having a communication potential (-VEE) of the second polarity in an inactive state among signal lines used as a control signal / data signal line of the host computer; And an amplifying stage configured to bias the first communication power supply and the second communication power supply, and amplifying a level of a data transmission signal from the game terminal and transmitting the amplified level to a host computer through a third signal line. Wow; A data receiver which attenuates the level of the data transmission signal from the host computer transmitted through the fourth signal line and transmits the level to the game terminal; External interface device of the game terminal comprising a. The method of claim 1, And the fourth signal line and the second signal line are the same signal line and are shared with the second communication power supply unit and the data receiving unit. The method of claim 1, wherein the data transmission unit: The emitter is connected to the data transmission signal line of the game terminal. The internal operating power of the game terminal is supplied through the resistor R1, the collector is connected to the second polarity through the resistor R5, and the base is grounded through the resistor R3. A first transistor turned on / off according to an output signal of the game terminal; An inverting amplifier connected to the base of the collector of the first transistor through a resistor R4; External interface device of the game terminal, characterized in that for amplifying the output voltage from the game terminal. 4. The apparatus of claim 1 or 3, wherein the data receiver comprises: A resistor (R7) connected to the data transmission signal line of the host computer to attenuate the output signal level from the host computer; An inverting amplifier having an output of the resistor R7 connected to a base; External interface device of the game terminal comprising a.