CN100378622C - Interface device capable of automatically judging peripheral equipment and electronic device with function - Google Patents

Abstract

An interface device, is suitable for judging the peripheral equipment kind automatically, the said interface device can also be set in an electronic device, the interface device includes a socket and a control unit, when the plug of the peripheral equipment is plugged into the said socket, the control unit detects the voltage difference of the specific two end points on the socket, judge whether the peripheral equipment needs to supply power by this, if the peripheral equipment needs to supply power, begin to provide the voltage source to the peripheral equipment, then the electronic device obtains the ID name of the peripheral equipment through the link, in order to carry out the corresponding order; if the peripheral device does not need to be powered, the control unit also detects a resistance-capacitance value inside the peripheral device, compares the RC value with a database corresponding to the type of the peripheral device, and further performs command operation corresponding to the peripheral device.

Description

An interface device that can automatically determine peripheral equipment and an electronic device with this function

technical field

The present invention relates to an interface device, and in particular to an interface device for automatically judging the type of peripheral equipment. The interface device can also be set on a portable electronic device, and the peripheral equipment that can be connected to the portable electronic device is typed. judge.

Background technique

As the technology of electronic devices is changing with each passing day, many peripheral devices matching with electronic devices are also continuously increasing in different models through research and development.

At present, the interface ports used by different types of peripheral devices and their respective manufacturers mostly use special connectors (Connect) as the main interface ports, such as eight-port or twelve-port connectors, which are used for data transmission and other connections to external peripherals. For applications with special functions such as video and high-quality music transmission, the disadvantage of special connectors is that there are many pins, so the connectors are relatively bulky, and anti-static protection must be provided for each exposed output pin, which will cause The overall manufacturing cost increases.

Portable electronic devices, such as mobile phones, are usually equipped with a simple headphone socket as a hands-free handset function. However, in order to provide peripheral devices with plugs, mobile phone manufacturers support a full range of peripheral devices, such as cameras, digital Players and the like are often provided with connection holes compatible with special connectors. In this way, the overall manufacturing cost of the mobile phone will be further improved, and the size of the mobile phone will be reduced.

Contents of the invention

In view of this, the purpose of the present invention is to provide an interface device for automatically judging the type of peripheral equipment. The interface device can use a plug as the interface port between the peripheral equipment and the mobile phone, so as to achieve the advantages of small size, low manufacturing cost and support for multiple accessories. Many advantages.

Another object of the present invention is to use the interface device for automatically judging the type of peripheral equipment, which can be set on a portable electronic device, thereby enabling the portable electronic device to have the function of automatically judging the type of peripheral equipment and generating an instruction to respond to the type of peripheral equipment operate.

Based on the stated purpose, the present invention provides an interface device, which can be arranged in an electronic device and can be used to connect a peripheral device equipped with a plug. The interface device includes a socket, a voltage source and a control unit, wherein the socket has A detecting terminal, a transmitting terminal, a receiving terminal, a power supply terminal and a grounding terminal. When the plug of the peripheral equipment is inserted into the socket, the detecting terminal of the socket will send a notification signal to the control unit. The voltage source is used to provide peripheral device power. After the control unit receives the notification signal, it can know that the peripheral device is ready, and then the control unit measures the voltage difference between the transmitting terminal and the power supply terminal on the socket, thereby judging whether the peripheral device needs power supply, and if the peripheral device needs When supplying power, the control unit couples the power terminal of the socket to a voltage source, thereby providing power to peripheral devices.

The interface device of the present invention can also be set on a portable communication device, wherein the portable communication device includes a communication unit to perform related communication functions, and the interface device is used to connect a peripheral device equipped with a plug, and can automatically Detect the type and model of the connected peripheral device.

Description of drawings

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail with accompanying drawings.

Wherein, the same or similar parts in the drawings are represented by the same symbols.

Fig. 1 is a schematic view showing all accessories of the interface device of the present invention;

Fig. 2 is a schematic diagram showing that the 3-port plug of the present invention is inserted into the socket;

Fig. 3 is a schematic diagram showing that the 4-port plug of the present invention is inserted into the socket;

Fig. 4 is a schematic diagram showing the potential of the measurement transmitting end (TX) of the present invention;

Fig. 5 is to represent the equivalent resistance-capacitance circuit diagram in the peripheral equipment of the present invention;

Fig. 6 is a diagram showing comparison and judgment of various fittings of the present invention and voltage difference;

Fig. 7 is a schematic diagram showing a portable communication device of the present invention.

Symbol Description

1～socket, 2～control unit, 3～voltage source, 4～first switch, 5～second switch, 6～storage unit, 7～3 port plug, 8～4 port plug, 9～diode, 10～pre- Setting voltage, 11～preset resistance, 12～equivalent capacitance in peripheral equipment, 13～equivalent resistance in peripheral equipment, 14～portable communication device, 15～communication unit, 16～interface device, 20～response circuit, TX～ Transmitter, RX~receiver, SW~detection, GND~ground, PWR~power

Detailed ways

The present invention provides an interface device 16 for automatically determining the type of peripheral equipment. As shown in Figure 1, the interface device 16 includes a socket 1, a voltage source 3 and a control unit 2, wherein the socket 1 has a detection terminal SW, a The transmitting terminal TX, a receiving terminal RX and a power supply terminal PWR, when the plug of the peripheral device is inserted into the socket 1 , the detecting terminal SW of the socket 1 will send a notification signal to the control unit 2 . The voltage source 3 is used to provide power for peripheral devices. After the control unit 2 receives the notification signal, it can know that the plug has been inserted into the socket 1 and the peripheral equipment is ready, and then the control unit 2 according to the voltage difference between the transmission terminal TX and the power supply terminal PWR on the socket 1, In this way, it is determined whether the peripheral equipment needs power supply. If the peripheral equipment needs power supply, the control unit 2 couples the power terminal PWR of the socket 1 to the voltage source 3 to provide power for the peripheral equipment. The control unit 2 turns on the first switch 4 (a bipolar junction transistor BJT in this embodiment) by outputting a first signal (Low potential) so that the power supply terminal PWR is coupled to the voltage source 3, and the socket 1 It also includes a reference terminal GND, which is coupled to a reference ground. When the control unit 2 receives the notification signal, it sends a third signal (High potential) to make the second switch 5 (a bipolar junction in this embodiment) Type transistor BJT) is turned on, and then the potential of the power supply terminal PWR is grounded, so that the purpose of obtaining the voltage difference between the transmission terminal TX and the power supply terminal PWR can be achieved by measuring the potential of the transmission terminal TX. After the control unit 2 determines whether the peripheral equipment is powered, it outputs a third signal (Low potential) to turn off the second switch 5 .

Due to the wide variety of electronic peripheral devices, the common ones are hands-free earphones or digital cameras. If it is a hands-free earphone head, it is a 3-port plug 7 as shown in Figure 2, or a digital camera interface connector as shown in Figure 2. 3 or 4-port plug 8, when inserted into the socket 1, both can make the detection terminal SW and the reference terminal GND conduction, and then output a ground potential through the detection terminal SW as a notification signal to the control unit 2, If the earphone of the hands-free handset does not need power supply, the control unit 2 will measure the equivalent resistance-capacitance (RC) value in the peripheral equipment (as shown in Figure 5), and the control unit 2 selects three specific times to obtain the transmission terminal TX Potential, the RC value of its peripheral equipment can be calculated by V (TX terminal) = V (initial discharge voltage) e-t/RC formula. For example, there is no capacitance inside the transmission line, so the measured voltage is fixed. According to compare the RC value in the storage unit 6 corresponding to the data of the type and model of the peripheral device, and then know the type of the peripheral device, to carry out the corresponding command operation, such as switching to the hands-free handset mode, so that the hands-free handset works.

As shown in Figure 6, it is a data table pre-stored in the control unit 2. The control unit 2 judges by comparing the voltage difference between the transmission terminal TX and the power supply terminal PWR through the data table, and checks whether the voltage difference falls within Specific voltage range, used to know whether peripheral devices need power supply.

As shown in Figure 4, the control unit 2 includes a preset voltage source 10 and a resistor 11 to generate a divided voltage to the potential of the transmission terminal TX. The peripheral equipment needs to be powered by the socket 1, and a response circuit 20 is provided in the power supply peripheral equipment. , the two ends of the response circuit 20 are coupled to the two ends of TX and PWR after the plug is connected to the socket, so when the divided voltage of the voltage source is provided to the response circuit 20, the response circuit 20 generates a fixed According to the fixed voltage value, the control unit 2 can judge whether the peripheral device is powered and its type. In this embodiment, the response circuit 20 is a diode 9. After the two ends of the diode 9 are connected to the socket through the plug, the conduction potential of the diode 9 is measured to be about 0.6V, and the control unit 2 can judge the peripheral The equipment needs power supply, and the storage unit 6 can store a relative fixed value of the peripheral equipment, which can be used by the control unit 2 as one of the basis for judging the type of the peripheral equipment.

After the control unit 2 judges that the peripheral device needs power supply, it can request the ID name from the peripheral device through the transmitting terminal TX and the receiving terminal RX on the socket 1. In this embodiment, the transmission method used between the control unit 2 and the peripheral device It is an asynchronous transfer (UART) method.

If after a specific time, the control unit 2 has not yet received the ID of the peripheral device's response, then cut off the voltage source 3 of the peripheral device. In this embodiment, the control unit 2 outputs a signal (Low potential) to turn off the first The switch 4 further achieves the purpose of cutting off the voltage source 3 .

In this embodiment, a central processing unit (CPU) is used to function as the control unit 2 .

As shown in Figure 7, the portable communication device 14 (the present embodiment is a mobile phone) includes a communication unit 15 for performing relevant communication functions, and the interface device 16 for connecting a peripheral device equipped with a plug and The type or model of the connected peripheral device can be automatically detected. The technology of the interface device 16 has been disclosed above, and if it is applied to the portable communication device 14, then the portable communication device 14 has the function of automatically judging the type of peripheral equipment and performing corresponding command operations accordingly, such as inserting an MP3 accessory, through After the interface device 16 judges, it switches to the MP3 mode immediately and automatically plays the song and indicates the corresponding instruction operation of the song title, the length of time, and the like.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of the present invention is defined by the appended claims.

Claims (22)

1. an interface arrangement is arranged in the electronic installation, and in order to connect a peripherals, described peripherals is furnished with a plug, comprising:

One socket has a test side, a transmission end (Tx) and a power end at least; Wherein, when described plug inserts, send a notification signal by described test side;

One voltage source is in order to provide described peripheral equipment power;

One control module, receive described notification signal after, according to described transmission end and described power end first voltage difference between the two, judge whether described peripherals needs power supply;

Wherein, need power supply if judge described peripherals, then described control module makes described power end couple described voltage source, and described peripheral equipment power is provided.

2. interface arrangement as claimed in claim 1 wherein, comprises that also one first switch is arranged between described power end and the described voltage source, and described control module is judged when described peripherals need be powered, and then exports one first signal and makes described first switch conduction.

3. interface arrangement as claimed in claim 1, wherein, described socket also comprises a reference edge, described reference edge is coupled to one with reference to ground connection.

4. interface arrangement as claimed in claim 3, wherein, when described plug inserted, the test side of described socket was connected to described reference edge by described plug, to export an earthing potential as described notification signal.

5. interface arrangement as claimed in claim 1, comprise that also a second switch is arranged on described power end and with reference between the ground connection, triggering according to described notification signal, described control module is exported a secondary signal and is made described second switch conducting, when described control module finish judge that described peripherals need be powered after, then export one the 3rd signal described second switch turn-offed.

6. interface arrangement as claimed in claim 1, wherein, if described control module is judged when described peripherals need not to power, then described control module is measured the first resistance-capacitance value of described peripherals inside by described transmission end and described power end, and judges the kind or the model of described peripherals according to this.

7. interface arrangement as claimed in claim 6 also comprises a storage unit, in order to first data of memory resistor-capacitance corresponding to the type of peripheral device model; By this, described control module can contrast described first data by the described first resistance-capacitance value and learn the kind or the model of described peripherals.

8. interface arrangement as claimed in claim 1 also comprises a storage unit, wherein in order to store the particular voltage range of described peripherals correspondence, if meet particular voltage range, judges then that described peripherals needs power supply when described first voltage difference.

9. interface arrangement as claimed in claim 8, wherein said transmission end (Tx) couples a fixed voltage.

10. interface arrangement as claimed in claim 9, described peripherals has an answering circuit, and when described plug inserted, described answering circuit was couple to described transmission end and described power end, and exports described first voltage difference.

11. interface arrangement as claimed in claim 10, described answering circuit comprise a diode.

12. interface arrangement as claimed in claim 1, wherein, described socket also comprises a receiving end, after described control module is coupled to described power end with described voltage source, also obtain the kind or the model of described peripherals, and start dependent instruction according to this corresponding to described peripherals by described transmission end and described receiving end.

13. interface arrangement as claimed in claim 12, wherein, if through behind the special time, described control module is not obtained the kind or the model of described peripherals as yet, and then excision is couple to the described voltage source of described power end.

14. a portable electron device can detect a kind of being furnished with the peripherals of plug that is connected automatically, comprising:

One socket has a test side, a transmission end (Tx), a receiving end (Rx) and a power end at least;

Wherein, when the plug of described peripherals inserts described socket, send a notification signal by described test side;

One voltage source is in order to provide described peripheral equipment power;

One control module, receive described notification signal after, according to described transmission end and described power end first voltage difference between the two, judge whether described peripherals needs power supply;

Wherein, need power supply if judge described peripherals, then described control module makes described power end couple described voltage source, and described peripheral equipment power is provided.

15. portable electron device as claimed in claim 14, wherein, comprise that also one first switch is arranged between described power end and the described voltage source, described control module is judged when described peripherals need be powered, and then exports one first signal and makes described first switch conduction.

16. portable electron device as claimed in claim 14 also comprises,

One communication unit;

Wherein when described peripherals was the earphone of a Handless, described communication unit was in order to carry out relevant communication function.

17. portable electron device as claimed in claim 14, comprise that also a second switch is arranged between described power end and the ground connection, triggering according to described notification signal, described control module is exported a secondary signal and is made described second switch conducting, after described control module judges whether described peripherals powers, then export one the 3rd signal described second switch is turn-offed.

18. portable electron device as claimed in claim 14, wherein, if described control module is judged when described peripherals need not to power, then described control module is measured the first resistance-capacitance value of described peripherals inside by described transmission end and described power end, and judges the kind or the model of described peripherals according to this.

19. portable electron device as claimed in claim 14, wherein said transmission end couples a fixed voltage.

20. portable electron device as claimed in claim 19, wherein, described peripherals has an answering circuit, and when described plug inserted, described answering circuit was couple to described transmission end and described power end, and exports described first voltage difference.

21. portable electron device as claimed in claim 20, described answering circuit comprise a diode.

22. portable electron device as claimed in claim 14, after wherein said control module is coupled to described power end with described voltage source, also obtain the kind or the model of described peripherals, and start dependent instruction according to this corresponding to described peripherals by described transmission end and described receiving end.

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