JPH07153247A - Car audio system, main unit and optional unit - Google Patents

Abstract

(57) [Summary] [Structure] An optional unit in which connector parts 9 and 10 are provided in a unit to which a connector part 9 of a main unit 3a having a CD-ROM player 23 and a connector part 10 of a power unit 3b are connected. Is F
M / AM tuner unit 15a, CD unit 1
6, the navigation unit 17, and the TV tuner unit 15b are sequentially connected, and the main unit 3a
FM / AM tuner unit 1 by the internal CPU
5a, CD unit 16, navigation unit 1
7. The program stored in the memory in the TV tuner unit 15b is controlled. [Effect] The option unit can be easily added and replaced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle audio equipment system, a main unit and an option unit suitable for connecting a plurality of on-vehicle audio equipments.

[0002]

2. Description of the Related Art Conventionally, in a car audio system, a so-called compact disc (CD) player,
One that is designed to connect a plurality of audio devices such as a cassette tape recorder to a main operating device (hereinafter, referred to as a head unit) and selectively operate a desired audio device from these audio devices. is there.

At present, as the head unit, there is a radio cassette deck player with a CD changer control function. This radio cassette deck player with a CD changer control function is a hardware consisting of an FM / AM tuner, a cassette deck, a clock, a sound quality adjusting section, a sound volume adjusting section, a display section, an operating section, and a power source section, and a micro controller for controlling these sections. A basic configuration consisting of computers,
A microcomputer and software for controlling the CD changer and an interface for communication with the CD changer connected to the radio cassette deck player with the CD changer control function are added.

[0004]

By the way, in the head unit having the above-mentioned configuration, when a function is added to the CD changer itself connected to the outside, or the head unit controls an audio device other than the CD changer. When connecting a control device (hereinafter, referred to as a unit), such as a TV (television) tuner, for example, it is necessary to add a communication function corresponding to each function or the control device of the audio equipment to the head unit. That is, the in-vehicle audio device system depends on the function of the head unit already mounted in the vehicle, and cannot control the function or the audio device other than the already provided function or the audio device as it is.

Further, in the head unit as described above, the power supply line, the antenna line for the FM / AM tuner, and the connection cables for connecting each additional unit are complicated, and the audio device is complicated. It becomes complicated when the system is mounted and repaired. In particular, at the time of designing and manufacturing a vehicle in an automobile manufacturing company, there is a problem in that a place for mounting a genuine audio equipment system and the complexity of wiring of the audio equipment system are complicated.

In view of the above-mentioned circumstances, the present invention provides an on-vehicle audio equipment system, a main unit and an option unit whose functions can be easily changed and added.

[0007]

In a vehicle audio equipment system according to the present invention, a plurality of option units including an audio equipment unit are connected to a main unit and controlled by the main unit, so that any optional unit is selected. Is an in-vehicle audio equipment system for operating an input control unit for controlling input data, an image display control unit for controlling output of images, and a program stored in a memory in the plurality of option units. A CPU device including a program executing unit for executing, an input device for inputting data controlled by the input control unit by a key operation, and a display device for displaying data and images controlled by the image display control unit. ON / OFF control is performed by the main unit provided and the CPU device,
A plurality of option units including a power unit that supplies power to a power supply line, hardware unique to the unit, and a memory that stores a program that controls the operation of the hardware, the main unit, the power unit, and the plurality of option units. With optional unit,
The problem described above is solved by providing a data signal, an address signal, a control signal, an audio signal, and a connection bus used when transmitting and receiving a power supply.

The program execution unit of the CPU device is characterized by comprising a main CPU having a large memory space and high speed, and a sub CPU for controlling input / output and power supply.

The power unit comprises a power supply section for supplying power to the power supply line of the connection bus and a power amplifier section for amplifying and outputting an audio signal.

The facing surfaces of the housings of the plurality of option units have the same size, and one and the other of the facing surfaces have one and the other of the pair of connectors which are fitted to each other. It is characterized in that it is provided at each position.

Further, a large capacity external storage device is provided in the main unit.

The main unit according to the present invention includes an input device for inputting data by key operation, an input control unit for controlling input data from the input device, an image display control unit for controlling output of an image, It is characterized by comprising a display device for displaying data and images controlled by the image display control unit, and a CPU device including a program execution unit for executing a program stored in a memory in a plurality of option units.

The option unit according to the present invention has hardware peculiar to the unit, the facing surfaces of the housing have the same size, and one and the other surfaces of the facing surfaces are fitted to each other. One and the other of a pair of mating connectors are respectively provided at the same position, and are an option unit having a memory storing a program, which is connected to the power unit or another option unit connected to the power unit by the connector, It is characterized in that the program is executed under the control of the unit to control the operation of the hardware unique to the unit.

[0014]

According to the present invention, a plurality of option units provided on the surfaces facing the connectors are arbitrarily connected to the main unit, and the programs stored in the memories respectively provided in the connected option units. Is controlled by the main CPU in the main unit to operate the hardware unique to each option unit.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of an on-vehicle audio equipment system according to the present invention when mounted.

In the vehicle 1 shown in FIG. 1, a display / operation unit (head unit) 2 including a monitor as a display unit and a keyboard as an operation unit 2, a front speaker 20, and a rear speaker 2 are provided.
1, an FM / AM antenna 11, a main unit for controlling each of these units, a power unit, and an assembly 3 of a plurality of option units are mounted to configure an audio device system.

FIG. 2 is a schematic block diagram of an on-vehicle audio equipment system according to the present invention. The head unit 2 including the monitor and keyboard shown in FIG.
Main board and CD-R provided with a CPU device having a PU, sub CPU, graphics drawing / display circuit, etc.
The main unit 3a composed of the OM player, the connecting portion 2
It is connected via 2. The power unit 3b includes a power supply unit, a DSP preamplifier unit, and a power amplifier unit. The power supply section of the power unit 3b supplies a stable power supply to the on-vehicle audio equipment system of the present invention, and the DSP preamplifier section performs functions such as sound quality / volume adjustment, surround sound, and parametric equalizer.
The front speaker 20 and the rear speaker 21 are connected to the power unit 3b via a connecting portion 22.

Further, FIG. 2 shows an FM / AM tuner unit 15a, a CD unit 16, a navigation unit 17, and a TV (television) tuner unit 15b as optional units. However, this TV tuner unit 15b is the above FM / AM
The tuner unit 15a may be included in the tuner unit 15a.

In the main unit 3a and the power unit 3b, the surface of the main unit 3a facing the power unit 3b (top surface) and the surface of the power unit 3b facing the main unit 3a (bottom surface) have the same size. Also, the connector portion 9 provided on the surface (upper surface) of the main unit 3a facing the power unit 3b and the connector portion 10 provided on the surface (bottom surface) of the power unit 3b facing the main unit 3a.
And are in the same position. Therefore, the main unit 3a
By fitting the connector portion 9 of the main unit 3a and the connector portion 10 of the power unit 3b,
And the power unit 3b are connected to each other.

Further, in each of the option units, a connector portion 9 similar to the connector portion 9 provided in the main unit 3a is provided on one of the side surfaces in contact with another unit, and the power unit 3b is provided. The connector portion 10 similar to the connector portion 10 provided in the above is provided on the other surface of the side surfaces in contact with other units, respectively. Here, the side surface of the assembly in which the main unit 3a and the power unit 3b are connected has the same size as the side surface of the option unit, and the connector portion 9 provided on the side surface of the power unit 3b and the option unit are provided. Connector part 9 and connector part 1
It is in the same position as 0. Therefore, the power unit 3
The power unit 3b and one option unit are connected to each other by fitting the connector part 9 of b and the connector part 10 provided on the other surface of the option unit. Further, a plurality of option units can be connected by fitting the connector unit 9 of the option unit connected to the power unit 3b and the connector unit 10 of another option unit.

The power unit 3b and the FM, which is an optional unit, are sequentially connected by the above connecting method.
/ AM tuner unit 15a, CD unit 16,
Navigation unit 17, TV tuner unit 1
A control signal from the main unit 3a is sent to 5b via the system bus 19 and is controlled.

Next, FIG. 3 shows a specific configuration of the vehicle-mounted audio equipment system according to the present invention. The main unit 3a and the power unit 3b shown in FIG. 3 are connected to each other, and the power unit 3b further includes an FM / AM / T which is an optional unit for controlling the unique hardware.
V tuner tuner unit 15, navigation unit 17, CD (compact disc) unit 1
6 are connected in order. In addition, the main unit 3
A rear monitor 8 and a handle operating section 7 can be connected to a.

The FM / AM tuner unit 15 is connected to the FM / AM antenna 11, and the navigation unit 17 for performing the navigation is G
A CD that is connected to a PS (Global Positioning System) antenna 13 and controls the CD changer.
The CD changer 12 is connected to the unit 16. Furthermore, an optional unit having another function can be connected after the CD unit 16. still,
Each of the above option units has a specified thickness,
This thickness may be an integral multiple of the specified thickness, or may be a desired free thickness.

Next, FIG. 4 shows a concrete block diagram of the on-vehicle audio equipment system according to the present invention. This on-vehicle audio equipment system has a CD-ROM in the main unit 3a.
The player 23 is provided.

A CRT or LCD is used for the main monitor 37, which is a display section in the head unit 2. Further, the head unit 2 has a keyboard 3 as an operation button.
6 and a rotary encoder for audio volume.

The main unit 3a is the core of the vehicle audio system according to the present invention. The main CPU 30 in the main unit 3a is a program execution unit, and includes a main ROM (read only memory) 33 in the main unit 3a and ROMs 44, 53, 5 built in the power unit 3b and each option unit.
6, 61 to access each of the programs to execute each program, and the main unit 3a, the power unit 3b, the tuner unit 15, which is an optional unit, and the CD unit 1
6. It controls the navigation unit 17, and a high-speed one is desirable.

The sub CPU 31 is an input control unit for controlling input data, and is an accessory switch (AC) of the vehicle.
C) power supply monitoring such as checking of battery (BAT) voltage, ON / OFF control of the power supply unit 41 in the power unit 3b for the on-vehicle audio equipment system of the present invention, activation (RESET) of the main CPU 30, and input means. Data is fetched by operating a keyboard 36 in a certain head unit 2, interrupt control for the main CPU 30 and control of a CD-ROM player 23 are performed. The sub CPU 31 is a single-chip microcomputer, and one system I / O (input / output) of the main CPU 30.
Is memory mapped as.

Further, the main ROM 9 is initialized (initialized) by the vehicle audio system of the present invention, data is fetched from the keyboard 36, display control of graphics drawing, video switching control, and from the CD-ROM player 23. The program stored in the ROMs 53, 56 and 61 in the tuner unit 15, the CD unit 16 and the navigation unit 17 which are so-called system function groups for fetching the data of the device, the electronic map function, and the optional units are executed. The program for mode transition control for is stored.

RAM (random access memory) 10
Stores the information data of the connected option unit that is entered when the vehicle audio system according to the present invention is initialized. The main unit 3a, the tuner unit 15, which is the option unit, and the CD unit 1 are stored.
6. It is the only RAM used as a work area for the navigation unit 17.

The graphics engine circuit 34 is a main monitor 37 in the head unit 2 which is a display means.
This is for performing high-speed drawing when performing all displays such as a display during operation to, a display of an electronic map, and a display during navigation.

The sub monitor 8 is for a passenger seat or a rear seat, and has a display unit 38 and an external input terminal (AUX IN).
Have 39. The sub monitor 8 has no operation button and displays the same image as the main monitor 37.

The video control unit 35 is an image display control unit for controlling the image output, and switches between the analog RGB video output from the graphics engine circuit 34 and the input from the external input terminal 39 in the sub monitor 8. It outputs analog RGB video signals and composite video signals, and superimposes them.

The CD-ROM player 23 has an electronic map display function, and a CD is used for drawing an electronic map required for navigation when the navigation system 7 is mounted.
Read data stored in ROM. The CD-ROM player 23 includes a plurality of CD-ROMs.
A changer type that can store all of them together is desirable.

The above-mentioned main unit 3a includes a power unit 3b, a tuner unit 15 as an optional unit, and a CD unit 1 by means of an 80-pin connector.
6, connected to the navigation unit 17. At this time, the system bus 19 includes the main unit 3a, the power unit 3b, and the optional units 15, 16 and 1
It is indispensable for connecting to 7 to configure the on-vehicle audio equipment system of the present invention, and is a feature of the on-vehicle audio equipment system of the present invention. The system bus 19 is roughly classified into a power supply line, a main CPU bus, an audio signal line, a video signal line, and other control lines.

Here, 8 used for the system bus 19
Table 1 shows the terminal arrangement of the 0-pin connector.

[0036]

[Table 1]

Terminals SW_5V of pins 1 to 4 in Table 1
Is used for ON / OFF control signal of 5V voltage. Terminals BAT_12V of the ninth pin to the twelfth pin are used for a 12V battery voltage. 18th pin terminal P_SW
Is used as an ON / OFF control signal for the system power supply output from the sub CPU 31 in the main unit 3a. This ON / OFF control signal is supplied to the power unit 3b.
It is output to the internal power supply unit 41.

The terminal ACC_5V of the 19th pin makes the accessory power source supplied from the vehicle, that is, the battery voltage when the vehicle ignition switch is at a position higher than ACC ON, to the logic level (0V / 5V) in the power unit 3b. The converted signal is used for the signal supplied to the sub CPU 31 in the main unit 3a. Sub CPU
By monitoring this signal, 31 controls ON / OFF control of the system power supply from the power supply unit 41 by the signal from the terminal P_SW. Specifically, this terminal ACC
When the signal from _5V indicates 0V, the system power supply from the power supply unit 41 is turned off, and the sub CPU 31 enters the memory backup state. Also, the terminal ACC_5
When the signal from V indicates 5V, the sub CPU 31 transitions from the memory backup state to the operating state, and turns on the signal from the terminal P_SW to turn on the system power supply from the power supply unit 41. Next, a RESET signal is output to initialize the main CPU 30 and the bus I / F section in each option unit.

The 20th pin terminal ILL_5V converts the illumination control signal supplied from the vehicle to the logic level (0V / 5V) inside the power unit 3b when the small lamp or the headlight is ON, and the head unit 2 , Used for signals supplied to the main unit 3a and each option unit. By monitoring this signal, the illumination brightness of the operation button on the head unit 2 can be switched between daytime and nighttime, and the input sensitivity of the tuner unit 15 can be switched. When the output from this terminal ILL_5V indicates 0V, the illumination control signal is turned off and 5V.
In case of, the illumination control signal is turned on.

The 21st pin terminal PRK_5V is converted to a logic level (0V / 5V) inside the power unit 3b by turning on / off the parking switch which indicates whether or not the side brake of the vehicle is being applied. 2, used for signals supplied to the main unit 3a and each option unit. By monitoring this signal, it is possible to recognize whether or not the vehicle is traveling, and it is possible to prevent complicated operations in the navigation system by the operation of the navigation unit 17 while the vehicle is traveling. When the terminal PRK_5V indicates 0V, the vehicle is stopped (side brake is applied), and when the terminal PRK_5V indicates 5V, the vehicle is running (side brake is not applied).

The terminal L_CH of the 23rd pin is the speaker 20.
The output from the left channel of the
CH is used for output from the right channel of the speaker 20. The 27th pin terminal VIDEO is used to output a composite video signal. The terminals DB_0 to DB_15 of the 36th to 51st pins are used for 16 data buses, and the terminals AB_1 to A of the 52nd to 74th pins are used.
B_23 is used for 23 address buses respectively. The terminals marked with * from the 75th pin to the 80th pin mean negative logic (ACTIVE LOW).

The power unit 3b, as described above,
An electronic volume for volume / balance / fader is provided, and includes a control unit 47 and a power supply unit 41 including a DSP preamplifier 43 and a power amplifier 42 which are composed of a parametric equalizer and a surround processor. The power supply unit 41 is a sub C in the main unit 3a.
ON / OFF control is performed by the PU 31. The control signal from the main unit 3a is sent via the bus I / F (interface) unit 46.

In the vehicle audio system shown in FIG. 4, the tuner unit 15, the CD unit 16 and the navigation unit 1 are optional units.
7 is connected. The tuner unit 15 is FM /
An AM tuner 51 and a TV tuner 52 are built in, and the FM / AM tuner 51 has an FM / AM antenna 11
However, the TV tuners 52 are connected to the TV antennas 14, respectively. Further, the CD unit 16 has a built-in CD changer I / F section 55 including a CD changer control communication interface section and an audio preamplifier section, and the CD changer 12 is connected to the CD changer I / F section 55. . It should be noted that instead of the CD unit 16, a unit using a further reduced high-density magnetic recording medium may be used. The navigation unit 17 has a built-in GPS circuit 60 that receives radio waves from satellites and calculates the current position for car navigation.

The tuner unit 15, the CD unit 16, and the navigation unit 17 have unit CPUs 55, 58, 63 and a ROM 5, respectively.
3, 56, 61 are built in. Unit CPU above
Reference numerals 55, 58, and 63 are unit microcomputers that control the hardware unique to the tuner unit 15, the CD unit 16, and the navigation unit 17 and interface with the main CPU 30 in the main unit 3a. The ROMs 53, 56, 61 store programs and data executed by the main CPU 30 in the main unit 3a for controlling the tuner unit 15, the CD unit 16, and the navigation unit 17.

The bus I / F of the tuner unit 15, the CD unit 16, and the navigation unit 17
The units 54, 57, and 62 are provided in the main CPU 30 via the system bus 19 and the ROMs 53 and 5 of each option unit
6, 61 and a system bus interface unit for accessing the unit CPUs 55, 58, 63,
The CPU BUS in the system bus is composed of an address decode and data input / output control logic circuit. The tuner unit 15, the CD unit 16, and the navigation unit 17 are respectively mapped in the address space of the main CPU 30, and each option unit is selected by the CPU BUS of the SimTem bus 19. That is, each option unit has a ROM (memory) and an I / O arranged in each address space within the address space of the main CPU 30.
Is a set of.

The system bus interface section of the bus I / F sections 54, 57 and 62 is common to each option unit, and each IC can be miniaturized by making it an IC. For example, when the number of option units is 8, an address map of the main CPU 30 is shown in FIG. 5, an address map of the RAM 32 is shown in FIG. 6, and an address map of the main ROM 33 is shown in FIG.

The FM / AM / TV tuner unit is the first option unit in the address map shown in FIG. 5, the DSP power amplifier unit is the second, the CD changer unit is the third, and the MD changer unit is the fourth. The fifth and the GPS and the navigation unit are respectively mapped, and it is possible to connect three optional units.

Next, the operating principle of the vehicle-mounted audio equipment system according to the present invention will be specifically described. Here, a single chip microcomputer having a backup function is used for the sub CPU 31 in the main unit 3a of FIG. 4 and the unit CPUs 55, 58, 63 in each option unit in order to retain the previous state.

First, in the main unit 3a in a state where the accessory switch (ACC_5V) of the vehicle audio system is turned on and the vehicle audio system is turned on by the system power button of the keyboard 36 in the head unit 2. The sub CPU 31 rises from the low power consumption (memory backup) mode (Wake up) and starts the operation.

The sub CPU 31 turns on the power switch (P_SW) to supply the system power. After the stabilization time has elapsed, the system is reset to initialize the main CPU 30, the system bus 19, the graphics engine circuit 34, etc.
Wait for READY or ACK signal from.

The sub CPU 31 is the main CPU 30.
After confirming the READY or ACK signal from, the power supply is monitored and the data is read from the keyboard 36 (key scan) periodically thereafter. If there is a change (update) in the data from the power supply and the keyboard 36,
An interrupt request is issued to the main CPU 30, and its status and key data are passed. Further, in response to a request from the main CPU 30, it also controls the driving of the CD-ROM player 23 and the fetching of data of a designated address.

The main CPU 30 is reset and started every time the vehicle audio system is turned on.
After initializing the RAM 32, the main ROM 33, and the graphics engine circuit 34, the connected option units, specifically, the tuner unit 15, the CD unit 16, and the navigation unit 17 are confirmed. This is called an initial link. As described above, the tuner unit 15, the CD unit 16, and the navigation unit 17 have ROs in which programs to be executed by the main CPU 30 are stored.
M53, 56, 61 are mounted, and the addresses of these ROMs 53, 56, 61 are memory-mapped as a system. Therefore, the main CP
The U30 is executed by obtaining the link information obtained from the head address of the ROM 53, 56, 61.

Here, for example, the data of the first word (2 bytes) of the ROM in the option unit is FFF.
If it is F (hexadecimal number), it means that the mapped address space, that is, the option unit does not exist. This is because the CPU BUS in the system bus 19 is pulled up in the main unit 3a, and FFFF is added to the head address of the ROM of each option unit.
It can be realized by writing data having a value other than (hexadecimal number) in advance.

If an optional unit is present, the program is stored in the ROM of the optional unit, and the program is executed from the start address (unit initialization program) to send and receive signals to and from the unit CPU. Previously the car audio system was turned off
Main unit 3 for displaying the status and title display
Information required by a and ROM of option unit
The start address of the program in the main unit 3a is entered in a predetermined work area of the option unit mapped in the RAM 32 in the main unit 3a. This operation is performed for all option units, and the initial link is completed.

After performing the above-mentioned initial link, the main CPU 30 executes the program (monitor program) in the main ROM 33. Next, in order to return the vehicle audio system to the state immediately before being turned off, the ROM of the selected option unit is based on the information entered by the initialization of each option unit.
Run the program in. If no option unit is selected, the title menu or the A / V select menu is displayed by the program in the main ROM 33, and the next selection is awaited.

Here, FIG. 8 shows the operating state of the vehicle-mounted audio equipment system when the FM radio is selected. F
The FM / AM tuner 51 for the M radio is provided in the tuner unit 15. At this time, the active units in the on-vehicle audio equipment system are the main unit 3a surrounded by the thick line, the power unit 3b,
And tuner unit 15 only. At this time, the main CPU 30 causes the ROM in the tuner unit 15 to
The program stored in 53 is being executed. This FM
The key data of the operation buttons and the screen display necessary for the operation of the / AM tuner 51 are all created by the program in the ROM 53 of the tuner unit 15 by the method of calling (calling) the system function stored in the main ROM 33. The functions of the tuner unit 15 are performed by the program stored in the ROM 53. Similarly, in other option units as well, in order to execute the function of each option unit, all the system functions stored in the main ROM 33 are called and the programs stored in the ROM in the option unit are executed. become. Specifically, since the numbers assigned to the respective operation buttons of the keyboard 36 on the head unit 2 are treated as key data, the meaning of the operation buttons in each option unit is completely free. Also, regarding screen display, it is possible to draw and display an arbitrary image using a plurality of graphics functions.

Switching of each option unit (mode switching) can be realized by always providing an A / V menu button on the operation screen of each option unit. When this A / V menu button is pressed, the processing of the program in the ROM of the option unit is once interrupted, and the processing shifts to the processing of the monitor program in the main ROM 33. Therefore, A / V
A menu is displayed to notify the tuner unit 15 of the end when the selected option unit (mode) is different from the previous option unit (mode), for example, the CD unit 16. With this,
By shifting to the execution of the program stored in the ROM 56 in the CD unit 16, the CD unit 16 becomes active. FIG. 9 shows an operating state of the vehicle-mounted audio equipment system of the present invention when the CD unit 16 is active. The main unit 3a, the power unit 3b, and the CD unit 16 surrounded by thick lines shown in FIG.
Is the active unit.

Similarly, FIG. 10 shows an operating state of the vehicle-mounted audio equipment system of the present invention when the navigation unit 17 is selected. The main unit 3a and the power unit 3b surrounded by thick lines shown in FIG.
The power supply unit 41 inside and the navigation unit 17 are active. The on-vehicle audio equipment system of the present invention uses audio from an FM / AM radio, a television, a CD changer or the like in the navigation mode by the function of the navigation unit 17 or in the electronic map mode by the function of the main unit 3a. It enables simultaneous output of (voice).

[0059]

As is apparent from the above description, in the on-vehicle audio equipment system according to the present invention, a plurality of option units including the audio equipment unit are connected to the main unit and controlled by the main unit. According to the present invention, an in-vehicle audio equipment system for operating any optional unit, wherein an input control unit for controlling input data, an image display control unit for controlling output of an image, and memories in the plurality of optional units are provided. A CPU for executing a program stored in the CPU, an input device for inputting data controlled by the input control unit by a key operation, and a data and an image controlled by the image display control unit. The main unit including a display device for displaying and the CPU device
A plurality of option units including a power unit that is N / OFF-controlled and supplies power to a power line, unit-specific hardware, and a memory that stores a program that controls the operation of the hardware; A connection bus used when transmitting and receiving a data signal, an address signal, a control signal, an audio signal, and a power source between the power unit and the plurality of option units is provided, and the program execution unit of the CPU device is , Main C with large memory space and high speed
The power unit includes a PU and a sub CPU that controls input / output and power, and the power unit includes a power supply unit that supplies power to the power supply line of the connection bus and a power amplifier unit that amplifies and outputs an audio signal. Since the main unit, the power unit, and the option unit are self-contained by providing the large-capacity external storage device in the main unit, there is a function or specification addition or change in the option unit. The main unit can be used as it is or when adding an optional unit having a new function to the main unit.

Also, the facing surfaces of the housings of the plurality of option units have the same size, and one and the other of the facing surfaces have the same one and the other of a pair of connectors fitted to each other. By providing each at the position,
Since the main unit, the power unit, and the option unit are connected by a connector, it is not necessary to use a connection cable that has been conventionally used for connection between audio devices. Therefore, it is possible to reduce the length and the number of connection cables in the entire in-vehicle audio equipment system, and to suppress complexity.

The main unit according to the present invention comprises an input device for inputting data by key operation, an input control unit for controlling input data from the input device, an image display control unit for controlling image output, and The present invention includes a display device that displays data and images controlled by the image display control unit, and a CPU device that includes a program execution unit that executes programs stored in the memories of a plurality of option units. Such an optional unit has hardware unique to the unit, the opposite faces of the housing have the same size, and one and the other faces of the opposite faces of a pair of connectors that are fitted to each other. One and the other are provided at the same position respectively, and are option units each having a memory in which a program is stored. Is connected to the other optional unit which is connected to the knit or the power unit, by controlling the operation of the unit-specific hardware to run the program under the control of the main unit,
Since the main unit and the option unit are integrated by the connector connection, the option unit can be easily added and replaced. Therefore, the option unit can be easily repaired. Further, when designing a vehicle in an automobile manufacturing company, it is possible to construct a vehicle-mounted audio device system in which the vehicle and the vehicle-mounted audio device system are further integrated.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an on-vehicle audio equipment system according to the present invention.

FIG. 2 is a schematic block diagram of an on-vehicle audio equipment system, a main unit, and an option unit according to the present invention.

FIG. 3 is a diagram showing a specific configuration of an in-vehicle audio equipment system, a main unit and an option unit according to the present invention.

FIG. 4 is a specific block diagram of an on-vehicle audio equipment system, a main unit and an option unit according to the present invention.

FIG. 5 is a diagram showing an address space of a main CPU in a main unit.

FIG. 6 is a diagram showing an address space of a RAM in the main unit.

FIG. 7 is a diagram showing an address space of a main ROM in the main unit.

FIG. 8 is a specific block diagram showing an operation state when a tuner unit is selected.

FIG. 9 is a specific block diagram showing an operating state when a CD unit is selected.

FIG. 10 is a specific block diagram showing an operation state when a navigation unit is selected.

[Explanation of symbols]

 1 ... Vehicle 2 ... Head unit 3a ... Main unit 3b ... Power unit 9, 10 ... Connector section 11 ... FM / AM antenna 12 ... CD changer 13 ・ ・ ・ ・ GPS antenna 14 ・ ・ ・ ・ ・ ・ TV antenna 15 ・ ・ ・ ・ Tuner unit 16 ・ ・ ・ ・ CD unit 17 ・ ・ ・ ・ ・ ・ Navigation unit 19 ・ ・ ・ ・ ・ ・ System bus 23 ・ ・ ・・ CD-ROM player

Claims (7)

[Claims] 1. An in-vehicle audio equipment system for operating an arbitrary option unit by connecting a plurality of option units including an audio equipment unit to a main unit and controlling the main unit by inputting the same. A CPU device including an input control unit for controlling data, an image display control unit for controlling output of an image, and a program execution unit for executing a program stored in a memory in the plurality of option units, and a key operation. A main unit including an input device for inputting data controlled by the input control unit, a display device for displaying data and images controlled by the image display control unit, and ON / OFF control by the CPU device, The power unit that supplies power to the power line and the unit-specific hardware A, a plurality of option units each including a memory storing a program for controlling the operation of the hardware, and a data signal, an address signal, and a control between the main unit, the power unit, and the plurality of option units. An in-vehicle audio equipment system, comprising: a connection bus used when transmitting and receiving a signal, an audio signal, and a power supply. 2. The program execution unit of the CPU device is
2. The vehicle-mounted audio equipment system according to claim 1, comprising a main CPU having a large memory space and high speed, and a sub CPU for controlling input / output and power supply. 3. The vehicle-mounted acoustic system according to claim 1, wherein the power unit includes a power supply unit that supplies power to a power supply line of the connection bus and a power amplifier unit that amplifies and outputs an audio signal. Equipment system. 4. The opposing surfaces of the plurality of option unit casings have the same size, and one and the other of the opposing surfaces have the same one and the other of the pair of connectors fitted to each other. The on-vehicle audio equipment system according to claim 1, wherein the audio equipment system is installed at each position. 5. The on-vehicle audio equipment system according to claim 1, wherein a large-capacity external storage device is provided in the main unit. 6. An input device for inputting data by key operation, an input control unit for controlling input data from the input device, an image display control unit for controlling image output, and a control by the image display control unit. A main unit, comprising: a display device for displaying data and images to be displayed; and a CPU device including a program execution unit for executing a program stored in a memory in a plurality of option units. 7. A pair of connectors, each of which has hardware unique to a unit, has opposing surfaces of a housing having the same size, and one and the other of the opposing surfaces are fitted to each other. One and the other are respectively provided at the same position, and are option units each having a memory for storing a program, which is connected to the power unit or another option unit connected to the power unit by the above connector, and is controlled by the main unit. An optional unit characterized by executing a program to control the operation of hardware unique to the above unit.