CN201216005Y - USB device having ID identification and user terminal - Google Patents
USB device having ID identification and user terminal Download PDFInfo
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- CN201216005Y CN201216005Y CNU2008200597489U CN200820059748U CN201216005Y CN 201216005 Y CN201216005 Y CN 201216005Y CN U2008200597489 U CNU2008200597489 U CN U2008200597489U CN 200820059748 U CN200820059748 U CN 200820059748U CN 201216005 Y CN201216005 Y CN 201216005Y
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Abstract
The utility model relates to a USB device with an ID mark, which comprises a USB function module and a USB interface which is connected with the USB function module, wherein the USB device further comprises a frequency signal module, the USB interface further comprises an ID pin, and a scheduled frequency signal which is produced by the frequency signal module is sent via the ID pin to be used as an ID mark signal of the USB device. Different USB devices are judged and distinguished through using frequency or a voltage duty factor in the frequency. Because the frequency signal is a digital signal, the USB device can effectively resist jamming, and guarantees the reliability of the signal transmission. Simultaneously, the selection range of the frequency signals is wider (generally is about 0-50MHz), and guarantees the cognizable number of the USB devices. Further, the utility model provides a user terminal which can distinguish the ID mark according to the frequency signal.
Description
Technical field
The utility model relates to a kind of ID identification technology of the USB device that is connected with portable terminal device, relates in particular to the USB device of (Identification, the identification code) sign that has ID, and relevant user terminals.
Background technology
USB (universal serial bus) (USB) because of its plug and play, support that hot plug, transmission speed are fast, can connect advantage such as many USB device by expansion, on personal computer (PC), be used widely.When PC connects a plurality of different USB device, can come the different USB device of identification by driver.
Recently, USB interface is popularized on mobile phone gradually.Along with the function of mobile phone is constantly abundant, the USB device that connects on the mobile phone is also more and more.Mobile phone can adopt the pattern that adopts among the above-mentioned PC to the differentiating method of different USB device, and this generally is to be applicable in the smart mobile phone.For non intelligent mobile phone, distinguish different USB device by ID.At present, the judgement of USB ID realizes by voltage.This has just produced two problems:
1. if judge with digital signal, just have only low-voltage ' 0 ', high voltage ' 1 ' two states, the quantity of make judging has only two kinds and can't satisfy a plurality of USB device and judge.
2. if judge with analog signal, just need carry out the conversion of ADC, increased cost.And the transmission reliability of analog signal is poor.
Therefore, expect to have a kind of sign and identification technique that can be applicable to the USB device of mobile phone, distinguish plural USB device.
The utility model content
Technical problem to be solved in the utility model provides a kind of USB device of the ID of having sign, and it can produce recognizable USB id signal, and the id signal difference that different USB device produces is so that by identification.
The utility model is to solve the problems of the technologies described above the USB device that the technical scheme that adopts provides a kind of ID of having sign, comprise a USB functional module and a USB interface that is connected with this USB functional module, this USB device also comprises a frequency signal module, and this USB interface also comprises an ID pin, this frequency signal module produces a predetermined frequency signal and sends via this ID pin, with the ID id signal as this USB device.
In above-mentioned USB device, this frequency signal module comprises a frequency generating circuit, and this frequency generating circuit produces this frequency signal with the frequency of setting.
In above-mentioned USB device, this frequency signal module also can comprise the duty cycle adjustment circuit, connects this frequency generating circuit, in order to set the voltage duty cycle of this frequency signal.
In above-mentioned USB device, this frequency generating circuit can be triangle wave generating circuit, and this duty cycle adjustment circuit can be comparison circuit.
In above-mentioned USB device, the frequency range of this frequency signal is between 0～50MHz.
The utility model also provides a kind of user terminal, is suitable for connecting at least one above-mentioned USB device by USB interface, and this user terminal comprises a signal recognition unit, in order to discern the ID of corresponding USB device according to above-mentioned predetermined frequency signal.
Above-mentioned user terminal can comprise various types of compact applications terminals such as mobile phone and personal digital aid (PDA).
The utility model makes it compared with prior art owing to adopt above technical scheme, only sends a frequency signal by increasing on USB device, just can utilize frequency or utilize the voltage duty cycle in the frequency to judge the USB device that differentiation is different.Because frequency signal itself is exactly a digital signal, can be effectively anti-interference, guarantee the reliability of signal transmission.Simultaneously, the range of choice of frequency signal is very wide from (about general 0-50MHz), has guaranteed the quantity of cognizable USB device.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, wherein:
Fig. 1 is the system configuration structure chart according to an embodiment of the utility model.
Fig. 2 is the structured flowchart of frequency signal module shown in Figure 1.
Fig. 3 utilizes the frequency of frequency signal to come the example of identification USB device.
Fig. 4 is an example of utilizing the duty identification USB device recently of frequency signal.
Fig. 5 is the circuit diagram according to the frequency signal module of an embodiment of the utility model.
Embodiment
With reference to shown in Figure 1, it illustrates the mobile phone USB device 10 according to a kind of ID of having sign of the present utility model, this USB device 10 typically comprises a USB functional module 11 and a usb 12 that is connected with this USB functional module, as the structure that USB had of routine, it meets for example USB1.1 or USB2.0 agreement.
In the utility model, for realizing the ID sign, this USB device 10 also comprises a frequency signal module 13, and usb 12 also comprises an ID pin.Wherein, produce a predetermined frequency signal, send via this ID pin, with ID id signal as this USB device 10 by frequency signal module 13.This signal enters mobile phone, personal digital aid (PDA) USB application terminals 30 such as (PDA), by the signal recognition unit 31 in the terminal according to the different USB device of this ID id signal identification.
The frequency signal that frequency signal module 13 is sent can comprise frequency information and/or duty cycle information.For instance, different frequencies can be set,, two kinds of different USB device can be identified with these two kinds of frequencies of 100KHz and 200KHz as with reference to shown in Figure 3.In another embodiment, can utilize the voltage duty cycle in the frequency signal to identify different USB device.With reference to shown in Figure 4, frequency is identical, and two kinds of different USB device of the frequency signal of duty ratio 50% and duty ratio 25% sign.
Certainly, can identify how different USB device in conjunction with frequency and two kinds of identification means of duty ratio.For example, use 2 kinds of frequencies (as 100KHz and 200KHz) and 2 kinds of duty ratios (as 25% and 50%) just can identify four kinds of different USB device.The range of choice of frequency signal is very wide, and as an example, this scope can be from 0-50MHz.
Fig. 2 illustrates the structured flowchart of frequency signal module shown in Figure 1.Frequency signal module 13 comprises power supply circuits 21, frequency generating circuit 22 and duty cycle adjustment circuit 23.Fig. 5 illustrates the circuit diagram of frequency signal module.Please be simultaneously with reference to Fig. 2, shown in Figure 5, the effect of power supply circuits 21 is that VBUS is the 5V power supply of USB in the circuit to whole frequency signal module 13 power supplies.What exemplify among Fig. 5 is the system that is suitable for 3V I/O, has therefore used the LDO of 3V.Practical application can be adjusted according to the needs of the I/O of system voltage.
Duty cycle adjustment circuit 23 be used to the to adjust frequency duty ratio of signal, typical duty cycle adjustment circuit 23 comprises comparison circuit, realizes duty cycle adjustment by the reference voltage of setting comparison circuit.What exemplify among Fig. 5 is the circuit that utilizes comparator U3, the frequency waveform that Fig. 5 medium frequency generation circuit produces is from the 4th pin input of U3, resistance R 8 and resistance R 7 are adjusted and can be produced different reference voltages at the 3rd pin of U3, thereby can produce frequency signal with different duty.
In practical work process, the frequency signal that frequency signal module 13 is exported is connected to through the ID of USB interface pin on the signal recognition unit 31 of user terminal 30, reads the frequency of this signal or the duty ratio of voltage by signal recognition unit 31.As required, signal recognition unit 31 can further comprise frequency identification unit and duty ratio identification unit, with the frequency and the duty ratio of difference reading frequency signal, is which kind of USB device thereby determine corresponding device.Signal recognition unit 31 is typically realized by the software programming of terminal handler by corresponding function, but this is not construed as limiting.In one embodiment, signal recognition unit 31 can be realized by specific hardware or firmware.
In the utility model, user terminal 30 can include but not limited to that mobile phone, PDA etc. use the compact applications terminal of USB interface.
Therefore, the utility model sends a frequency signal by increasing on USB device, utilizes frequency or utilizes the voltage duty cycle in the frequency to judge the USB device that differentiation is different.Because frequency signal itself is exactly a digital signal, can be effectively anti-interference, guarantee the reliability of signal transmission.Simultaneously, the range of choice of frequency signal is very wide from (about general 0-50MHz), has guaranteed the quantity of cognizable USB device.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection range of the present utility model is worked as with being as the criterion that claims were defined.
Claims (9)
1. one kind has the USB device that ID identifies, comprise a USB functional module and a USB interface that is connected with this USB functional module, it is characterized in that, this USB device also comprises a frequency signal module, and this USB interface also comprises an ID pin, this frequency signal module produces a predetermined frequency signal and sends via this ID pin, with the ID id signal as this USB device.
2. USB device as claimed in claim 1 is characterized in that, this frequency signal module comprises a frequency generating circuit, and this frequency generating circuit produces this frequency signal with the frequency of setting.
3. USB device as claimed in claim 2 is characterized in that, this frequency signal module also comprises the duty cycle adjustment circuit, connects this frequency generating circuit, in order to set the voltage duty cycle of this frequency signal.
4. USB device as claimed in claim 3 is characterized in that this frequency generating circuit is a triangle wave generating circuit, and this duty cycle adjustment circuit is a comparison circuit.
5. USB device as claimed in claim 1 is characterized in that, this frequency signal module comprises the duty cycle adjustment circuit, connects this frequency generating circuit, in order to set the voltage duty cycle of this frequency signal.
6. USB device as claimed in claim 5 is characterized in that this frequency generating circuit is a triangle wave generating circuit, and this duty cycle adjustment circuit is a comparison circuit.
7. USB device as claimed in claim 1 is characterized in that the frequency range of this frequency signal is between 0～50MHz.
8. a user terminal is suitable for connecting at least one USB device as claimed in claim 1 by USB interface, it is characterized in that described user terminal comprises a signal recognition unit, in order to discern the ID of corresponding USB device according to described predetermined frequency signal.
9. user terminal as claimed in claim 8 is characterized in that comprising mobile phone and personal digital aid (PDA).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200597489U CN201216005Y (en) | 2008-06-16 | 2008-06-16 | USB device having ID identification and user terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200597489U CN201216005Y (en) | 2008-06-16 | 2008-06-16 | USB device having ID identification and user terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201216005Y true CN201216005Y (en) | 2009-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200597489U Expired - Fee Related CN201216005Y (en) | 2008-06-16 | 2008-06-16 | USB device having ID identification and user terminal |
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| Country | Link |
|---|---|
| CN (1) | CN201216005Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI696921B (en) * | 2019-03-28 | 2020-06-21 | 威鋒電子股份有限公司 | Usb integrated circuit |
-
2008
- 2008-06-16 CN CNU2008200597489U patent/CN201216005Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI696921B (en) * | 2019-03-28 | 2020-06-21 | 威鋒電子股份有限公司 | Usb integrated circuit |
| US10901934B2 (en) | 2019-03-28 | 2021-01-26 | Via Labs, Inc. | USB integrated circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090401 Termination date: 20130616 |