CN105375207A - USB cable - Google Patents
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- CN105375207A CN105375207A CN201510746826.7A CN201510746826A CN105375207A CN 105375207 A CN105375207 A CN 105375207A CN 201510746826 A CN201510746826 A CN 201510746826A CN 105375207 A CN105375207 A CN 105375207A
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Abstract
The invention relates to a USB cable. The USB cable is used for connecting a first male end and a second male end, through an internal circuit of the USB cable, CC detection on the second male end and configuration are realized, a switch control function of a VBUS power source channel is realized, problems of closing or damage to a downlink port are not only solved, but also user experience is greatly improved.
Description
Technical field
The present invention relates to USB technical field, refer in particular to and a kind ofly support that USBStandardA male is to the special USB cable of USBTYPEC male.
Background technology
Current USBTypeC cable supports D+, D-data communication of superfast Differential data communication, USB2.0, interface detects and shakes hands and the function such as power delivery, therefore has transmission speed (the highest 10Gbps) and more intrepid electric power transfer (the highest 100W) faster.Because the feature that described TypeC two-sided inserting interface is maximum supports the two-sided insertion of USB interface, formally solve the global problem of " USB inserts inaccurate forever ", positive and negative is at will inserted, and therefore starts to be applied in electronic applications more and more widely.
As shown in Figure 1, current USBStandardA male 1 is just connected by cable 3 between two males simply to the cable of USBTypeC male 2.Particularly, as shown in Figure 2, power supply (VBUS) pin of power supply (VBUS) pin of described USBStandardA male 1, D-pin, D+ pin, ground connection (GND) pin and described USBTypeC male 2, Dn pin, Dp pin, ground connection (GND) pin connect one to one, and a resistance Rp is directly added between the VBUS pin and CC pin (A5 pin) of described USBTypeC male 2, the resistance value of described Rp is generally 56 kilohms, namely only declares default USB power capability.Discuss the cable inner circuit of USB2.0StandardA male to USBTypeC male above, in like manner for USB3.1StandardA male to USBTypeC male, except increase by two pairs of differential high-speed data receiving and transmitting signal lines and corresponding ground wire, catch up with that to state USB2.0StandardA male the same to USBTypeC male cable configurations, particularly, the StdA_SSRX+ pin of described USB3.1StandardA male 1, StdA_SSRX-pin, StdA_SSTX+ pin, the SSTXp1 pin of StdA_SSTX-pin and described USBTypeC male, SSTXn1 pin, SSRXp1 pin, SSRXn1 pin connects one to one.Described USBTypeC end has a Rp resistance to be connected across between VBUS pin and CC pin in addition, so that the C of this cable holds male to declare oneself to be USBTypeC downlink port DFP (DownstreamFacingPort) when the equipment connection with band C end female seat.
According to USBTypeC specification, as a rule, downlink port DFP can keep C to hold the power supply of the VBUS pin of male to be in off state before USBTypeC uplink port UFP (UpstreamFacingPort) being detected.And the A of existing cable holds VBUS power supply and C to hold VBUS power supply to be the pass-through state be often connected, directly cause the shutoff demand of the VBUS that cannot support early stage; In addition, cable is once design and production complete, and its Rp value is just fixed, cannot according to described USBStandardA male connect the real current capacity of power end and adjust Rp value and configure correct current capacity parameter to allow C hold connected UFP to know.So, if Rp indicates DFP to be 3A current capacity, and in fact power end only has such as 500mA current capacity, and at this moment, UFP draws electric current DFP source may be caused to turn off or damage according to DFP3A ability; Or cable simply declares the most conservative USB default power ability by Rp value 56 kilohms.
Summary of the invention
For this reason, technical problem to be solved by this invention be to overcome in prior art cannot support the shutoff demand of USBTypeC downlink port in early stage and USBTypeC downlink port may there is the problems such as source damage thus provide a kind of can control USBTypeC downlink port shutoff and avoid the USB cable that DFP source turns off or damages.
For solving the problems of the technologies described above, a kind of USB cable of the present invention, for connecting the first male end and the second male end, wherein said first male end comprises a VBUS pin, D-pin, D+ pin and the first ground pin, described second male end comprises the 2nd VBUS pin, Dn pin, Dp pin, CC pin and the second ground pin, and described D-pin is connected with described Dn pin, described D+ pin is connected with described Dp pin, described first ground pin is connected with described second ground pin, described USB cable inside comprises CC pin and detects configuration module and VBUS power switching module, a wherein said VBUS pin is connected with described 2nd VBUS pin by VBUS power switching module, a described VBUS pin detects configuration module by CC pin and is connected with CC pin, and described CC pin detection configuration module is connected with described VBUS power switching module.
In one embodiment of the invention, a described VBUS pin is connected with described first ground pin by the first male end current capacity detection module, and described first male end current capacity detection module detects configuration module with described CC pin is connected.
In one embodiment of the invention, described CC pin detection configuration module is connected with optional input module.
In one embodiment of the invention, a described VBUS pin also detects configuration module by control unit with described CC pin and is connected.
In one embodiment of the invention, described first male end current capacity detection module is also connected with described control unit.
In one embodiment of the invention, described control unit is connected with the second male end temperature detecting module, and described CC pin detection configuration module is connected with described second male end temperature detecting module.
In one embodiment of the invention, described D-pin and described D+ pin are connected with control unit respectively.
In one embodiment of the invention, described Dn pin and described Dp pin are connected with control unit respectively.
In one embodiment of the invention, described 2nd VBUS pin is connected with described second ground pin with light-emitting diode by resistance, and the positive pole of described light-emitting diode is connected with described resistance, the negative pole of described light-emitting diode is connected with described second ground pin.
In one embodiment of the invention, described CC pin detects in configuration module and is provided with variable resistor.
Technique scheme of the present invention has the following advantages compared to existing technology:
USB cable of the present invention; by the circuit realiration of cable inner the CC of C end detect and configuration, VBUS power channel switch control rule and corresponding C holds the instruction of VBUS power LED, C holds male and held by C that male inserts the overtemperature protection of the C type female seat of equipment, A holds the voltage specification of corresponding power and the equipment such as the detection of current capacity and mobile phone to carry out the functions such as certification by Dn/Dp or D-/D+ to cable, significant increase Consumer's Experience certainly will be adopted in a large number by market.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the outline drawing of existing USBStandardA male to USBTypeC male cable;
Fig. 2 is the interconnector figure of existing USBStandardA male to USBTypeC male cable;
Fig. 3 is the inside connection layout of USBStandardA male of the present invention to USBTypeC male cable.
Embodiment
Embodiment one:
As shown in Figure 3, a kind of USB cable, for connecting the first male end 10 and the second male end 20, wherein said first male end 10 comprises a VBUS pin, D-pin, D+ pin and the first ground pin, described second male end 20 comprises the 2nd VBUS pin, Dn pin, Dp pin, CC pin and the second ground pin, and described D-pin is connected with described Dn pin, described D+ pin is connected with described Dp pin, described first ground pin is connected with described second ground pin, described USB cable inside comprises CC pin and detects configuration module and VBUS power switching module, a wherein said VBUS pin is connected with described 2nd VBUS pin by VBUS power switching module, a described VBUS pin detects configuration module by CC pin and is connected with CC pin, and described CC pin detection configuration module is connected with described VBUS power switching module.
USB cable of the present invention, for connecting the first male end 10 and the second male end 20, wherein said first male end 10 comprises a VBUS pin, D-pin, D+ pin and the first ground pin, described second male end 20 comprises the 2nd VBUS pin, Dn pin, Dp pin, CC pin and the second ground pin, and described D-pin is connected with described Dn pin, described D+ pin is connected with described Dp pin, described first ground pin is connected with described second ground pin, described first ground pin and the equal ground connection of described second ground pin, described USB cable inside comprises CC pin and detects configuration module and VBUS power switching module, a wherein said VBUS pin is connected with described 2nd VBUS pin by VBUS power switching module, a described VBUS pin detects configuration module by CC pin and is connected with CC pin, and described CC pin detection configuration module is connected with described VBUS power switching module.When described first male end 10 is inserted into USB power source port, described CC pin detects configuration module and starts working, when described second male end 20 is inserted into uplink port UFP or support two role's port DRP (DualRolePort) of uplink port UFP function, downlink port DFP notifies the current capacity that this downlink port of uplink port UFP DFP is concrete, if the electric current of described downlink port DFP and USB power source port does not mate, then described CC pin detects configuration module and just can remain open state by control VBUS mains switch, thus prevent downlink port DFP from turning off or damage, now can be set by the described CC pin detection resistance value of configuration module inside of control or the current source of equivalence, make described first male end 10 connect the real current capacity of power end and detect the resistance of configuration module configure correct current capacity parameter so that the UFP allowing described second male end 20 connect knows by adjusting described CC pin, if the currents match of described downlink port DFP and USB power source port, through the reaction time after described downlink port DFP insertion uplink port UFP, after 100 milliseconds, described CC pin detects configuration module and just can close by control VBUS mains switch, makes a described VBUS pin be connected with described 2nd VBUS pin thus realize powering to uplink port UFP.
In the present embodiment, in order to know size of current when described first male end 10 is inserted into USB power source port, and detect voltage specification and the current capacity of USB power source, a described VBUS pin is connected with described first ground pin by the first male end current capacity detection module, forms loop thus just can obtain electric current and the voltage of described first male end 10 by a described VBUS pin, the first male end current capacity detection module and described first ground pin; Described first male end current capacity detection module detects configuration module with described CC pin and is connected, and described CC pin detection configuration module is connected with described CC pin, thus realize utilizing described downlink port DFP to notify the current capacity that this downlink port of uplink port UFP DFP is concrete.
In order to make the currents match of described downlink port DFP and USB power source port, described CC pin detects configuration module and is connected with optional input module, and being provided with variable resistor Rp in described CC pin detection configuration module, the circuit that described CC pin detects configuration module can set the described CC pin detection Rp resistance value of configuration module inside or the current source of equivalence according to the level state of its 1-2 " optional input " pin.
In addition, in order to make the currents match of described downlink port DFP and USB power source port, be out of shape as one, a described VBUS pin detects configuration module by control unit with described CC pin and is connected, described control unit module mainly through the first male end current capacity detection module determine in advance described first male end 10 connect the current capacity of power supply, and described control unit module also can control CC pin detection configuration module, inputted by the controlling of described control unit, the CC pin detection Rp resistance value of configuration module inside or the current source of equivalence are set.Particularly, described first male end current capacity detection module detects configuration module by control unit module with described CC pin and is connected, the current feedback that described first male end 10 obtains by described first male end current capacity detection module, to described control unit, realizes setting the described CC pin detection Rp resistance value of configuration module inside or the current source of equivalence by the controlling input of described control unit.Wherein, described first male end current capacity detection module utilized the various combination of its internal load impedance to load in short-term the VBUS that the first male end 10 is directly come before described VBUS mains switch closes, can test under the help of the then current sensor of described control unit module in the first male end current capacity detection module the now corresponding electric current of VBUS passage and in addition test input to the VBUS voltage of described control unit module come together to judge described first male end 10 connect the electric current of power supply and the limit of power of voltage.
In the present embodiment, in order to prevent power supply or ground contact impedance is bigger than normal or power line has an extra leakage of current to ground wire time, described second male end 20 may produce high heat and even cause cable and equipment interface to burn, need the temperature detecting described second male end 20, particularly, described control unit is connected with the second male end temperature detecting module, and described CC pin detection configuration module is connected with described second male end temperature detecting module, the temperature of detection is sent to described control unit by described second male end temperature detecting module, the temperature detection result of described control unit to described second male end temperature detecting module responds, the state that configuration module controls described VBUS power switching module is detected by described CC pin, once temperature is too high, cut off described VBUS mains switch, realize the overtemperature protection to described second male end 20.
In order to judge that whether cable is the cable of its original-pack high-performance big current ability, by equipment such as mobile phones, certification is carried out to cable, described D-pin and described D+ pin are connected with control unit respectively, carry out authentication communication thus judge whether described cable is client cables by described control unit to described D-pin and described D+ pin; As one distortion, described control unit also can carry out authentication communication to described Dn pin and described Dp pin, and particularly, described Dn pin and described Dp pin are connected with control unit respectively, thus judge whether described cable is client cables.It should be noted that: described control unit module needs detection between the D-/D+ of the Dn/Dp or described second male end 20 that do not affect described first male end 10 and data communication, with Dn/Dp or D-/+carry out authentication communication to realize being identified of cable itself.
In order to judge whether described 2nd VBUS pin has electricity, described 2nd VBUS pin is connected with described second ground pin with light-emitting diode by resistance, and the positive pole of described light-emitting diode is connected with described resistance, the negative pole of described light-emitting diode is connected with described second ground pin, if described 2nd VBUS pin has electricity, then LED instruction can be bright, otherwise do not work.
CC pin described in the present embodiment detects the solution being integrated into or multiple chips after configuration module, VBUS power switching module, the second male end temperature detecting module, control unit module, the first male end current capacity detection module and the 2nd VBUS have all or part function of the LED of electricity instruction etc. to reconfigure.
First male end of the present invention is USBStandardA male, described second male end is USBTypeC male, and described USB cable can be applied on the wall with USBStandardA interface female seat on the power supply management to the electronic equipment with USBTypeC interface female seat (uplink port UFP) such as charger, onboard charger, portable power source, PC.
To sum up, technical scheme of the present invention has the following advantages:
1. USB cable of the present invention, when described first male end is inserted into USB power source port, described CC pin detects configuration module and starts working, when described second male end is inserted into uplink port UFP, downlink port DFP notifies the current capacity that this downlink port of uplink port UFP DFP is concrete, if the electric current of described downlink port DFP and USB power source port does not mate, then described CC pin detects configuration module and just can remain open state by control VBUS mains switch, thus prevent downlink port DFP from turning off or damage, now can be set by the described CC pin detection resistance value of configuration module inside of control or the current source of equivalence, make described first male end connect the real current capacity of power end and configure correct current capacity parameter so that the UFP allowing described second male end connect knows by adjustment Rp value, if the currents match of described downlink port DFP and USB power source port, through the reaction time after described downlink port DFP insertion uplink port UFP, described CC pin detects configuration module and just can close by control VBUS mains switch, makes a described VBUS pin be connected with described 2nd VBUS pin thus realize powering to uplink port UFP.
2. USB cable of the present invention, in order to prevent power supply or ground contact impedance is bigger than normal or power line has an extra leakage of current to ground wire time, described second male end may produce high heat and even cause cable and equipment interface to burn, described control unit is connected with the second male end temperature detecting module, and described CC pin detection configuration module is connected with described second male end temperature detecting module, the temperature of detection is sent to described control unit by described second male end temperature detecting module, the temperature detection result of described control unit to described second male end temperature detecting module responds, the state that configuration module controls described VBUS power switching module is detected by described CC pin, once temperature is too high, cut off described VBUS mains switch, realize the overtemperature protection to described second male end.
3. USB cable of the present invention, in order to judge that whether cable is the cable of its original-pack high-performance big current ability, by equipment such as mobile phones, certification is carried out to cable, described D-pin, described D+ pin, described Dn pin and described Dp pin are all connected with control unit, carry out authentication communication or carry out authentication communication to described Dn pin and described Dp pin thus judge whether described cable is client cables by described control unit to described D-pin and described D+ pin.
Obviously, above-described embodiment is only for clearly example being described, the restriction not to execution mode.For those of ordinary skill in the field, other multi-form change or variation can also be made on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among the protection range of the invention.
Claims (10)
1. a USB cable, for connecting the first male end and the second male end, wherein said first male end comprises a VBUS pin, D-pin, D+ pin and the first ground pin, described second male end comprises the 2nd VBUS pin, Dn pin, Dp pin, CC pin and the second ground pin, and described D-pin is connected with described Dn pin, described D+ pin is connected with described Dp pin, described first ground pin is connected with described second ground pin, it is characterized in that: described USB cable inside comprises CC pin and detects configuration module and VBUS power switching module, a wherein said VBUS pin is connected with described 2nd VBUS pin by VBUS power switching module, a described VBUS pin detects configuration module by CC pin and is connected with CC pin, and described CC pin detection configuration module is connected with described VBUS power switching module.
2. USB cable according to claim 1, it is characterized in that: a described VBUS pin is connected with described first ground pin by the first male end current capacity detection module, and described first male end current capacity detection module detects configuration module with described CC pin is connected.
3. USB cable according to claim 2, is characterized in that: described CC pin detects configuration module and is connected with optional input module.
4. USB cable according to claim 2, is characterized in that: a described VBUS pin also detects configuration module by control unit with described CC pin and is connected.
5. USB cable according to claim 4, is characterized in that: described first male end current capacity detection module is also connected with described control unit.
6. USB cable according to claim 4, is characterized in that: described control unit is connected with the second male end temperature detecting module, and described CC pin detection configuration module is connected with described second male end temperature detecting module.
7. USB cable according to claim 4, is characterized in that: described D-pin and described D+ pin are connected with control unit respectively.
8. USB cable according to claim 4, is characterized in that: described Dn pin and described Dp pin are connected with control unit respectively.
9. USB cable according to claim 1, it is characterized in that: described 2nd VBUS pin is connected with described second ground pin with light-emitting diode by resistance, and the positive pole of described light-emitting diode is connected with described resistance, the negative pole of described light-emitting diode is connected with described second ground pin.
10. USB cable according to claim 1, is characterized in that: described CC pin detects in configuration module and is provided with variable resistor.
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| CN201510746826.7A CN105375207B (en) | 2015-11-05 | 2015-11-05 | A kind of USB cable |
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| CN105375207B CN105375207B (en) | 2018-02-06 |
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| CN110416849A (en) * | 2019-07-25 | 2019-11-05 | 东莞市玖木通实业有限公司 | A kind of data line with temperature overheat protector function |
| CN110416849B (en) * | 2019-07-25 | 2021-11-02 | 广东玖木通实业有限公司 | Data line with temperature overtemperature protection function |
| TWI754477B (en) * | 2020-12-01 | 2022-02-01 | 創惟科技股份有限公司 | Usb signal transmission device, usb cable and operation method thereof |
| CN114579497A (en) * | 2020-12-01 | 2022-06-03 | 创惟科技股份有限公司 | USB signal transmission device, USB cable and operation method thereof |
| US11714771B2 (en) | 2020-12-01 | 2023-08-01 | Genesys Logic, Inc. | USB signal transmission device, operation method thereof, and USB cable |
| CN114579497B (en) * | 2020-12-01 | 2024-03-15 | 创惟科技股份有限公司 | USB signal transmission device, USB cable and operation method thereof |
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| CN105375207B (en) | 2018-02-06 |
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