KR20030085669A - PCMCIA/IEEE1394 Relay apparatus of Set-top Box for satellite telecommunication - Google Patents

Abstract

PURPOSE: A PCMCIA/IEEE 1394 interface of a set top box for receiving satellite broadcast is provided to transmit broadcasting data at higher rate and to reduce data loss due to transmission of broadcasting data of a TS signal. CONSTITUTION: A PCMCIA/IEEE 1394 interface(100) of a set top box for receiving satellite broadcast includes a PCMCIA port(120), an IEEE 1394 interface(160), and a switch(140). The PCMCIA port is connected to a PCMCIA slot linked with a main board of the set top box and receives broadcasting data of a TS signal converted by the set top box through the PCMCIA slot. The IEEE1394 interface is connected to an IEEE 1394 port(10) linked with an external device and transmits the broadcasting data of the TS signal inputted to the PCMCIA port to the external device through the IEEE 1394 port. The switch transmits the broadcasting data of the TS signal inputted to the PCMCIA port to the IEEE 1394 interface through a transmission line on the basis of a control command inputted to the PCMCIA port.

Description

PCMCIA / IEEE1394 Relay apparatus of Set-top Box for satellite telecommunication}

The present invention relates to a PCMCIA / IEEE1394 relay device of a set-top box for receiving a satellite broadcast, and more particularly, for receiving a satellite broadcast for interconnecting a set-top box for receiving a satellite broadcast with a PCMCIA slot and an external device connected to the IEEE1394 port. A PCMCIA / IEEE1394 relay device for a set top box.

In general, a set-top box (STB) is a kind of broadcasting modem for converting a broadcast signal received so that a digital broadcast can be viewed on a TV in a general home. At present, the developed set-top box includes a set-top box for terrestrial broadcasting, a set-top box for receiving satellite broadcasting, and a set-top box for receiving cable broadcasting. Among them, a set-top box for receiving a satellite broadcast is a device that converts the satellite broadcast signal received from a program provider (PP) and transmitted through a satellite to be viewed through an external display device. That is, the set-top box for receiving a satellite broadcast performs demodulation, channel decoding, and error correction for retransmitting a high frequency (RF) broadcast signal received at a reception antenna to an external display device, and converts the broadcast signal to MPEG-TS (SMPTE). 310M) and transmits the data to an external display device.

Receiving antennas for receiving satellite broadcast signals are mainly used parabolic antenna and mobile satellite antenna. The set-top box for satellite broadcasting currently available has three products. First, it is equipped with CAS (Conditional Access System), which restricts reception to receive paid broadcasting provided by a specific broadcasting company, secondly, FTA (Free-To-Air) that can receive free broadcasting, and thirdly, CAS card. It is the CI (Common Interface), an open system that can watch specific paid broadcasting.

Meanwhile, the set-top box for receiving a satellite broadcast stores the broadcast data externally to transmit the broadcast data to an external storage medium for storing the received broadcast data on an external storage medium and to display the broadcast data stored on the external storage medium on an external display device. Has an interface for receiving from the medium. In order to transmit broadcast data in the form of MPEG and digital audio / video to an external display device such as an external storage medium, an interface of a set-top box for receiving a satellite broadcast may be used to transmit and receive broadcast data (TS) and control signals. Ten transmission lines are required. In general, a PCMCIA (Personal Computer Memory Card International Association) type of interface is used.

Meanwhile, the data transmission bus between the set-top box for receiving satellite broadcasting and the external device provided with the PCMCIA slot uses a high-performance serial bus that implements a high-speed bus. This high performance serial bus is an IEEE 1394 digital serial bus, which is defined as a node, a module, and a unit. Here, the node is an addressable entity, and reset and recognition may be performed independently. A module consists of one or more nodes. A node is a logical addressing concept, whereas a module is a physical package. In addition, a node is a logical entity with a unique address, which can be independently reset with an ID ROM and a series of standardized control registers. The address space provided by a node may be mapped to one or more units. A unit is a logical object, such as a disk controller, that corresponds to its own I / O driver software. On the other hand, the PC is connected to the IEEE P1394 type A / V device by using an add-on card of the PCI (Programmable Communication Interface) method.

The PCMCIA, or the International Personal Computer Memory Card Association, is an industry organization organized in 1989 to promote standards for credit card sized memory and input / output devices for use in notebook computers. The PCMCIA 2.1 standard, published in 1993, allows any peripheral connected to a portable computer to be considered a standard attachment. The PCMCIA is a new system of the international memory card standard that expands the function by inserting it in the form of a card as an optimum peripheral device for a portable computer. PCMCIA is a modification of the expansion slots for desktop computers to be used on notebook computers. PCMCIA is a small notebook or card shape that makes use of the "portability" that is typical of notebook computers. It is easy to carry, easy to install, and retains the "scalability" of expansion slots. For example, if you use a modem for PCMCIA, you can use the modem simply by plugging the modem card into the PCMCIA slot. Currently, peripherals allowed by the PCMCIA standard include memory, hard disk drives (HDDs), fax modems, LAN cards, music cards, FDDIs, data modems, emulators, controllers, and wireless modems.

The PCMCIA standard has a 16-bit bus data line, 64 mega address lines, dozens of control lines, and a plurality of power lines. However, the broadcast data of the TS converted by the set-top box for receiving a satellite broadcast has a structure of data lines of an 8-bit bus and control lines corresponding to synchronization, validity, error, and clock. Accordingly, in order to use the PCMCIA standard as an interface of a set-top box for receiving a satellite broadcast, a PCMCIA / IEEE1394 relay device having a converter for converting TS data into PCMCIA standard broadcast data is required. In addition, the conventional PCMCIA / IEEE1394 relay device includes a converting function for converting broadcast data converted to PCMCIA standard into broadcast data of TS in an interface module mounted in the PCMCIA slot and transmitting broadcast data to an external device.

Such a conventional PCMCIA / IEEE1394 relay device has a problem in that a converting function for converting broadcast data into TS and PCMCIA standards must be provided. This is a problem that the production cost of the product increases when producing the PCMCIA / IEEE1394 relay device. In addition, the PCMCIA / IEEE1394 relay device has a problem that data loss with respect to the original signal occurs as the broadcast data is converted into TS and / or PCMCIA standards.

An object of the present invention for solving the above problems is a hassle for converting the form of data when transmitting and receiving broadcast data restored through a set-top box for receiving satellite broadcast and broadcast data transmitted from an external device through the IEEE1394 bus. It is to provide a PCMCIA / IEEE1394 relay device of a set top box for satellite broadcasting that can solve the problem.

Another object of the present invention is to convert the form of broadcast data into TS and / or PCMCIA standards when transmitting broadcast data restored through a set-top box for receiving satellite broadcast to an external device and receiving broadcast data transmitted from an external device. It is to provide a PCMCIA / IEEE1394 relay device of a set-top box for receiving satellite broadcasting, which can reduce the loss of data.

1 is a perspective view schematically showing a PCMCIA / IEEE1394 relay apparatus of a set-top box for satellite broadcasting reception according to the present invention;

2 is a front view showing in detail the pin structure of the PCMCIA port of FIG.

3 is a diagram showing in detail the types of signals transmitted through each pin of the PCMCIA port of FIG.

4 is a block diagram illustrating an example of a satellite broadcasting system to which FIG. 1 is applied.

Explanation of symbols on the main parts of the drawings

10: IEEE1394 port 100: PCMCIA / IEEE1394 relay device

120: PCMCIA port 140: switching unit

160: IEEE1394 interface 200: Set top box for satellite broadcasting

300: antenna 400: computer

500: TV 600: program providing system

700: satellite station 800: satellite

The object as described above is connected to the PCMCIA slot connected to the main board of the set-top box for receiving satellite broadcasting and connected to the PCMCIA port, an external device for receiving the broadcast data of the TS signal converted in the set-top box through the PCMCIA slot The IEEE1394 interface connects the IEEE1394 port and transmits the broadcasting data of TS signal input to the PCMCIA port to an external device through the IEEE1394 port, and the TSs connected to the PCMCIA port and interconnected according to the transmission line established at the PCMCIA port and the IEEE1394 interface. It is achieved by the PCMCIA / IEEE1394 repeater of the set-top box for satellite broadcast reception including a switching unit for transmitting the broadcast data of the signal to the IEEE1394 interface via a transmission line based on a control command input to the PCMCIA port.

Preferably, the PCMCIA port has an input pin for receiving broadcast data of a TS signal through a PCMCIA slot, and a broadcast pin having an output pin transmitted from an external device and outputting broadcast data of a TS signal received through an IEEE1394 interface to a PCMCIA slot. It includes a data transmission pin, a control transmission pin for transmitting a control command between the control unit provided in the microcomputer and the switching unit of the set-top box for receiving the satellite broadcast, and a power pin for receiving a predetermined power provided from the set-top box for receiving the satellite broadcast.

The input pin is a TS input pin for receiving broadcast data of a TS signal through a PCMCIA slot, an input clock pin for receiving a clock signal for input of broadcast data of a TS signal from a PCMCIA slot, and a broadcast signal of an input TS signal. An input error pin for receiving an error check signal, an input start pin for receiving information indicating the start of the reception of broadcast data of the TS signal, and an input valid pin for receiving information on the validity of the broadcast data of the input TS signal Has Here, there are eight TS input pins.

The output pin is a TS output pin for outputting the broadcasting data of the TS signal input from an external device to the set-top box for satellite broadcasting reception through the PCMCIA slot, and a clock for outputting the broadcasting data of the TS signal to the set-top box for satellite broadcasting reception. An output clock pin for outputting a signal, an output error pin for outputting an error check signal of the broadcast data of the TS signal output to the set-top box for receiving a satellite broadcast, and an output for outputting information indicating the start of the output of the broadcast data of the TS signal And a start pin, and an output valid pin for outputting information on whether broadcast data of the output TS signal is valid. Here, there are eight TS output pins.

The control transmission pin is a first control pin for transmitting a control command for input and output of the broadcast data of the TS signal between the control unit provided in the microcomputer and the switching unit of the set-top box for receiving a satellite broadcast, the first control pin for transmitting the control command necessary for the operation of the control unit A third control pin having a control pin, an address pin for transmitting address information of the module provided in the switching unit output from the microcomputer, and a module control pin for transmitting an operation command of the module corresponding to the address information; and a PCMCIA slot in the microcomputer. It has a card recognition pin for transmitting card recognition information that is information on the type of card connected to. Here, there are eight address pins and ten module control pins.

Preferably, the first control pin has a synchronization pin for transmitting a synchronization signal for transmitting a control command between the microcomputer and the control unit, and a control data pin for transmitting a control command between the microcomputer and the control unit. The second control pin may include: a register pin for transmitting a signal required to register a control signal for a module provided in the switching unit, a write command pin for transmitting a write command of a broadcast data of a TS signal, and a read of broadcast data of a TS signal. It has a read command pin for sending a command, a selection command pin for sending a selection command for the module, and a reset pin for resetting necessary settings between the microcomputer and the control unit.

On the other hand, the power pin, the power supply pin for receiving the heterogeneous DC power provided from the set-top box for receiving the satellite broadcasting and supplying it to the module provided in the switching unit, and grounding to the power provided from the set-top box for receiving the satellite broadcasting It has a plurality of ground pins. Here, one of the heterogeneous DC power supplies is 3.3 volts, and the other is 5 volts.

According to the present invention, according to the pin setting of the PCMCIA port set in accordance with the present embodiment, by transmitting and receiving the broadcast signal of the TS signal to and from the external device through the IEEE1394 interface without converting the broadcast data of the TS signal to the PCMCIA standard. It is not necessary to convert broadcast data to PCMCIA standard, and high speed broadcast data transmission is possible. In addition, by transmitting and receiving the broadcast data of the TS signal through the PCMCIA port without changing the form of the broadcast data of the TS signal, it is possible to reduce the data loss due to the transmission of the broadcast data of the TS signal.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a perspective view schematically showing a PCMCIA / IEEE1394 relay apparatus of a set-top box for satellite broadcasting reception according to the present invention. The PCMCIA / IEEE1394 relay device 100 of the figure is connected to a set-top box for receiving satellite broadcasts, and is connected to a PCMCIA port 120 for transmitting and receiving broadcast data to and from an IEEE1394 port 10 connected to an external device. An IEEE 1394 interface 160 and a switching unit 140 in which an element and a bus are formed to transmit and receive broadcast data between the PCMCIA port 120 and the IEEE 1394 interface 160.

The PCMCIA port 120 is mounted on a PCMCIA slot (not shown) connected to a main board (not shown) of the set-top box for receiving satellite broadcasting, and transmits broadcast data output from the main board to the switching unit 140. In addition, the PCMCIA port 120 transmits the broadcast data output from the switching unit 140 to the main board via the PCMCIA slot. The IEEE 1394 interface 160 is connected to an IEEE 1394 port 10 connected to an external device having a storage medium such as a personal computer to transmit broadcast data output from the switching unit 140 to the external device through the IEEE 1394 port 10. The switching unit 140 allows the broadcast data inputted to the PCMCIA port 120 to be output at high speed to the IEEE 1394 interface 160. On the other hand, the set-top box for satellite broadcasting reception is provided with a guide (not shown) to be mounted to the PCMCIA slot connected to the main board of the PCMCIA / IEEE1394 relay device 100.

In this embodiment, the use of the IEEE 1394 bus for transmitting and receiving broadcast data between the set-top box for receiving a satellite broadcast and an external device is because high-speed transmission of broadcast data for digital broadcasting is possible. In general, IEEE1394 is used as an interface for connecting not only computer peripheral devices but also home appliances such as video cameras, audio products, televisions, and video cassette recorders (VCRs) to personal computers. Currently, IEEE1394 has three data transfer rates: 100MB, 200MB, and 400MB. In addition, IEEE1394 supports hot plug-ins that can be connected simultaneously when a personal computer is running. The data transmission of IEEE1394 provides two methods, synchronous transmission and asynchronous transmission. Since simultaneous transmission is a real time transmission, it is suitable as an interface for delivering multimedia information such as video or voice. Asynchronous transmission is a method of dividing and transmitting data, which can be used for data transmission between a personal computer and a peripheral device such as a hard disk or a printing press.

2 is a front view illustrating in detail the pin structure of the PCMCIA port 120 of FIG. As shown, the PCMCIA port 120 has the same structure as a general PCMCIA port, and the number of pins has a total of 68 pins. PCMCIA port 120 is an input pin for receiving the broadcast data of the TS signal from the PCMCIA slot, an output pin for outputting the broadcast data of the TS signal output from the switching unit 140 to the PCMCIA slot, receiving power through the PCMCIA slot It is divided into a power pin and a control pin for transmitting and receiving a control signal with a microcomputer (not shown) of a set-top box for receiving a satellite broadcast.

The input pins according to the present embodiment are pins 123a and 11 to 16 and 45 to 50 pins 123b. Output pins are pins 3-8 and 37-42. The power pins include pins 1 and 35 (121a), pins 9 and 43 (121b), pins 17 and 18, and pins 51 and 52 (121c), pins 26 and 60 (121d), and 34 and 68 pins 121e. The control pins are pins 10 and 44 (127a), pins 19 and 25 and pins 53 and 59 (127b), pins 27 and 33 and 61 and 67 (127c), and pin 36 ( 127d).

Accordingly, according to the pin specification of the PCMCIA port 120 according to the present embodiment, the broadcast data of the TS signal is transmitted to an external device through the IEEE 1394 interface 160 without converting the broadcast signal of the TS signal to the PCMCIA standard. This eliminates the need for conversion and enables faster broadcast data transmission.

3 is a diagram illustrating the types of signals transmitted through each pin of the PCMCIA port 120 of FIG. 2. Description of the drawings will be described based on FIG. 2. Pin 123a of the input pin receives a clock (CLOCK) for the input of the broadcast data of the TS signal from the PCMCIA slot. Pins 11 to 14 and 45 to 48 receive broadcast data of the TS signal. Pin 15 receives an error check signal for broadcast data of an input TS signal. Pin 16 receives a signal indicating whether the TS signal is valid for broadcast data. Pin 49 receives an input start signal indicating the start of the input of the broadcast data of the TS signal. Do not use pin 50.

On the other hand, pins 3 to 6 and pins 37 to 40 of the output pins output the broadcast data of the TS signal input from the external device through the IEEE 1394 interface 160 to the PCMCIA slot. Pin 7 outputs an error check signal for broadcast data of the output TS signal. No. 8 outputs information on whether the broadcast data of the TS signal is valid. Pin 41 outputs an output start signal indicating the start of the output of the broadcast data of the TS signal. Pin 42 outputs the clock (CLOCK) for the output of the broadcast data of the TS signal.

In addition, pins 1, 9, 26, 34, 35, 43, 60, and 68 of the power pins are ground pins. Pins 17 and 51 receive VCC power from the set-top box for satellite broadcasts via the PCMCIA slot. At this time, the input VCC power supply is 3.3 volts (V). Pins 18 and 52 receive VPP power from the set-top box for satellite broadcasting. At this time, the input VPP power is 5 volts.

Pin 10 of the control pins transmits a clock for input / output of the broadcasting data of the TS signal between the microcomputer of the set-top box for receiving satellite broadcasting and the controller (not shown) of the PCMCIA / IEEE1394 relay device 100. Pin 44 transmits control data for control between the microcomputer of the set-top box for receiving satellite broadcasting and the control unit of the PCMCIA / IEEE1394 relay device 100. Pin 19 transmits a signal for registering a control signal for each module of the PCMCIA / IEEE1394 relay device 100. Pin 20 transmits a write command for the broadcasting data of the TS signal from the microcomputer of the set-top box for receiving the satellite broadcasting. Do not use pin 21. Pin 53 sends a read command to the broadcast data of the TS signal from the microcomputer of the set-top box for receiving the satellite broadcast. Pin 54 transmits the selection command of the module of the PCMCIA / IEEE1394 relay device 100 from the microcomputer of the set-top box for receiving satellite broadcasting. Pin 55 transmits a signal for resetting between the set-top box for receiving a satellite broadcast and the PCMCIA / IEEE1394 relay device 100. Pins 22 to 25 and pins 56 to 59 transmit control data between the microcomputer of the set-top box for receiving satellite broadcasting and the control unit of the PCMCIA / IEEE1394 relay device 100.

Pin 27 transmits the operation delay signal output from the microcomputer of the set-top box for receiving satellite broadcasting. Pin 61 transmits the interference signal output from micom of set top box for satellite broadcasting. Pins 28 to 32 and 62 to 66 transmit address information on the control command output from the microcomputer of the set-top box for satellite broadcasting reception. Do not use pin 33. Pins 67 and 36 transmit the PCMCIA / IEEE1394 repeater 100 to the recognition signal that can be recognized by the microcomputer of the set-top box for receiving satellite broadcasting.

4 is a block diagram illustrating an example of a satellite broadcasting system to which FIG. 1 is applied. The program providing system 600 such as a broadcasting station provides the satellite broadcasting station 700 with a broadcasting program capable of satellite broadcasting. The satellite transmitting station 700 transmits the broadcast program provided from the program providing system 600 to the satellite 800 through a transmitting antenna (not shown). The satellite 800 retransmits the broadcast program transmitted from the satellite transmitting station 700 to the ground.

Accordingly, the receiving antenna 300 receives a broadcast program of a high frequency transmitted from the satellite 800, and outputs the received broadcast program to the set-top box 200 for receiving a satellite broadcast. The set top box 200 for receiving a satellite broadcast converts the received broadcast program into broadcast data of a TS signal in an MPEG2 format. In addition, the set-top box 200 for receiving a satellite broadcast transmits the broadcast data of the TS signal to the computer 400 through the PCMCIA / IEEE1394 relay device 100 connected to the PCMCIA slot (not shown). At this time, the computer 400 stores the broadcast data of the TS signal received according to the input signal in a storage medium such as a hard disk and / or displays it on the screen. In addition, the PCMCIA / IEEE1394 relay device 100 transmits the broadcast data of the TS signal to the television 500. Preferably, the PCMCIA / IEEE 1394 relay device 100 converts the broadcast data of the TS signal into a form that can be displayed on the television 500 and outputs the same to the television 500.

According to the present invention, according to the pin setting of the PCMCIA port set in accordance with the present embodiment, by transmitting and receiving the broadcast signal of the TS signal to and from the external device through the IEEE1394 interface without converting the broadcast data of the TS signal to the PCMCIA standard. It is not necessary to convert broadcast data to PCMCIA standard, and high speed broadcast data transmission is possible. In addition, by transmitting and receiving the broadcast data of the TS signal through the PCMCIA port without changing the form of the broadcast data of the TS signal, it is possible to reduce the data loss due to the transmission of the broadcast data of the TS signal.

In the above described and illustrated with respect to the preferred embodiment of the present invention, the present invention is not limited to the specific preferred embodiment described above, without departing from the gist of the invention claimed in the claims in the art Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

Claims (14)

A PCMCIA port connected to a PCMCIA slot connected to a main board of a set-top box for receiving satellite broadcasting, and receiving broadcast data of a TS signal converted from the set-top box through the PCMCIA slot; An IEEE1394 interface connected to an IEEE1394 port connected to an external device and transmitting broadcast data of the TS signal input to the PCMCIA port to the external device through the IEEE1394 port; And The IEEE1394 interface through the transmission line based on a control command inputted to the PCMCIA port to broadcast data of the TS signal input to the PCMCIA port and connected to each other according to a transmission line provided at the PCMCIA port and the IEEE1394 interface. PCMCIA / IEEE1394 repeater of the set-top box for receiving a satellite broadcast, comprising: a switching unit for transmitting to. The method of claim 1, The PCMCIA port is An input pin that receives the broadcast data of the TS signal through the PCMCIA slot, and an output pin that is transmitted from the external device and outputs the broadcast data of the TS signal received through the IEEE1394 interface to the PCMCIA slot Broadcast data transmission pins; A control transmission pin for transmitting the control command between the microcomputer of the set-top box for receiving the satellite broadcast and a control unit provided in the switching unit; And PCMCIA / IEEE1394 repeater of the set-top box for satellite broadcasting, comprising: a power pin for receiving a predetermined power provided from the set-top box for receiving satellite broadcasting. The method of claim 2, The input pin is, A TS input pin for receiving the broadcast data of the TS signal through the PCMCIA slot; An input clock pin for receiving a clock signal for inputting the broadcast data of the TS signal from the PCMCIA slot; An input error pin for receiving an error check signal for the broadcast data of the input TS signal; An input start pin configured to receive information indicating a start of reception of the broadcast data of the TS signal; And PCMCIA / IEEE1394 relay apparatus for a set-top box for satellite broadcasting, comprising: an input valid pin for receiving information on whether the broadcast data of the TS signal input is valid. The method of claim 3, The TS input pins are PCMCIA / IEEE1394 repeater of the set-top box for receiving satellite broadcasting, characterized in that eight. The method of claim 2, The output pin, A TS output pin configured to output the broadcast data of the TS signal input from the external device to the set top box for receiving the satellite broadcast through the PCMCIA slot; An output clock pin for outputting a clock signal for outputting the broadcast data of the TS signal to the set-top box for receiving satellite broadcasting; An output error pin for outputting an error check signal of the broadcast data of the TS signal output to the set top box for receiving the satellite broadcast; An output start pin for outputting information indicating the start of the output of the broadcast data of the TS signal; And PCMCIA / IEEE1394 relay apparatus of a set-top box for receiving a satellite broadcast, characterized in that it comprises a; output valid pin for outputting information on whether or not the broadcast data of the TS signal is output. The method of claim 5, The TS output pin is a PCMCIA / IEEE1394 relay device of the set-top box for receiving satellite broadcasting, characterized in that the eight. The method of claim 2, The control transmission pin, A first control pin configured to transmit the control command necessary for input / output of the broadcast data of the TS signal between the microcomputer of the set top box for receiving the satellite broadcast and the controller provided in the switching unit; A second control pin for transmitting the control command necessary for the operation of the controller; And And a third control pin including an address pin for transmitting address information of the module provided in the switching unit output from the micom, and a module control pin for transmitting an operation command of the module corresponding to the address information. PCMCIA / IEEE1394 repeater of the set-top box for receiving satellite broadcasting. The method of claim 7, wherein The first control pin, A sync pin for transmitting a sync signal for transmitting the control command between the microcomputer and the controller; And And a control data pin for transmitting the control command between the microcomputer and the control unit. The method of claim 7, wherein The second control pin, A register pin configured to transmit a signal required to register a control signal for the module provided in the switching unit; A recording command pin for transmitting a recording command of broadcast data of the TS signal; A read command pin for transmitting a read command of broadcast data of the TS signal; A selection command pin for transmitting a selection command for the module; And And a reset pin for resetting required settings between the microcomputer and the control unit. The method of claim 7, wherein The address pin is a PCMCIA / IEEE1394 relay device of the set-top box for receiving satellite broadcasting, characterized in that eight. The method of claim 7, wherein The module control pin is a PCMCIA / IEEE1394 relay device of the set-top box for receiving satellite broadcasting, characterized in that the ten. The method of claim 7, wherein The control transmission pin is a PCMCIA / IEEE1394 relay of the set-top box for satellite broadcasting, characterized in that it further comprises a; card recognition pin for transmitting the card recognition information that is information on the type of card connected to the PCMCIA slot to the microcomputer Device. The method of claim 2, The power pin is, A power supply pin for receiving heterogeneous DC power provided from the set-top box for receiving satellite broadcasting and supplying the heterogeneous DC power to the corresponding module provided in the switching unit; And And a plurality of ground pins grounded to the power provided from the set-top box for receiving the satellite broadcast. The PCMCIA / IEEE1394 relay device of the set-top box for receiving the satellite broadcast. The method of claim 13, One of the heterogeneous DC power supply is 3.3 volts, the other is a 5 volt PCMCIA / IEEE1394 relay device of the set-top box for satellite broadcasting.