CN107665177B - USB switching device based on USB Type-C framework - Google Patents

USB switching device based on USB Type-C framework Download PDF

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Publication number
CN107665177B
CN107665177B CN201710342388.7A CN201710342388A CN107665177B CN 107665177 B CN107665177 B CN 107665177B CN 201710342388 A CN201710342388 A CN 201710342388A CN 107665177 B CN107665177 B CN 107665177B
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China
Prior art keywords
module
usb type
signal
voltage
identification
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CN201710342388.7A
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CN107665177A (en
Inventor
杨江云
戴玉瑶
张立伟
牛情礼
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Luxshare Precision Industry Chuzhou Ltd
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Luxshare Precision Industry Chuzhou Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/382—Information transfer, e.g. on bus using universal interface adapter
    • G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/38—Universal adapter
    • G06F2213/3852—Converter between protocols

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The present invention relates to a kind of USB switching devices based on USB Type-C framework, it includes USB Type-C module, signal conversion module, level identification module, Lightning module and power regulator module, the USB Type-C module is produced for USB Type-C end signal of transferring, and complete the signal configuration of positive and negative insertion identification, the signal conversion module is completed by differential path configuration chip, the level identification module gives SEL pin configuration logic level, complete the positive and negative insertion identification of Lightning interface, the power regulator module, which carries filter capacitor by 1.8V voltage stabilizing chip, to be completed+5V voltage being converted to+1.8V DC power supply, for giving differential path configuration chip power supply.

Description

USB switching device based on USB Type-C framework
Technical field
The present invention relates to based on USB Type-C framework USB switching device more particularly to USB Tpye-C turn Lightning device.
Background technique
On the basis of original USB3.0, transmission structure advanced optimizes USB transmission scheme at present, USB3.1 association occurs View specification, on the basis of USB3.1 framework, has developed Type-C type USB framework, since USB transport protocol is downward in 2013 It is compatible, USB Type-C framework compatible USB2.0, USB3.0, and also signaling rate is faster, and performance is more powerful, and volume is more It is small, therefore the unified other kinds of interface of USB of Type-C framework becomes trend.
Lightning interface is the usb type based on USB2.0 framework, before the appearance of USB Type-C interface, With its unique positive and negative plugging function of support, by consumers, with the appearance of USB Type-C interface, Lightning is connect The shortcomings that mouth, gradually exposes, therefore is trend by USB Type-C interface substitution, but still there are many Lightning interfaces in market USB transmission line and equipment need between Type-C and lightning interface switching technique to carry out transition.
Summary of the invention
The purpose of the present invention is to provide a kind of USB switching devices based on USB Type-C framework, are not sacrifice Can and function under the premise of, complete USB Type-C and Lightning interface between switching, be USB Type-C with Signal converting technology between Lightning completes the transition of USB Type-C interface substitution Lightning structure.
To realize foregoing purpose, the present invention adopts the following technical scheme: a kind of USB switching based on USB Type-C framework Device comprising USB Type-C module, signal conversion module, level identification module, Lightning module and power supply pressure stabilizing mould Block,
The USB Type-C module is produced for USB Type-C end signal of transferring, and completes positive and negative insertion identification Signal configuration, the USB Type-C module include a connector, a resistance, a capacitor, the power supply of USB Type-C Signal transfers out from connector, as+5V power supply, for the power supply of equipment and completion charging function after being filtered by shunt capacitance Can, circuit is constituted with the GND of connector, resistance one end connects the signal pins on connector, and other end connection+5V power supply is complete It is configured at the identification of positive and negative insertion, completes the positive and negative insertions function of USB Type-C, drawn and use from DN the and DP pin of connector In the data-signal and DP of the USB2.0 of transmission；
The signal conversion module is completed by differential path configuration chip；
The Lightning module include two pairs of differential data signals, a positive and negative insertion identification signal ACC_ID, and Power supply signal Vbus and GND, when the insertion of front, the ACC_ID of male seat is by LD1 entering signal conversion module, front insertion For that can recognize ACC_ID, corresponding SEL pin high level, reverse side insertion is then exactly the opposite, due to LD0 pin floating, Identification is less than ACC_ID, corresponding SEL pin low level；
The level identification module gives SEL pin configuration logic level, and the positive and negative insertion for completing Lightning interface is known Not, level identification module includes a single channel comparator, and a filter capacitor, the function of comparator chip is as follows:
A: when ACC_ID is able to detect that, the voltage of IN+ is greater than IN-, and permanent IN- ground connection is 0V, and OUT exports 5V electricity Pressure, SEL pin are high level；
B: when can't detect ACC_ID, the voltage of IN+ is equal to IN-, because both not exporting, OUT at this time 0V is exported, then SEL pin is low level；
The power regulator module by 1.8V voltage stabilizing chip carry filter capacitor complete+5V voltage being converted to+1.8V it is straight Galvanic electricity source, for giving differential path configuration chip power supply, power regulator module includes a voltage stabilizing chip and two capacitors, pressure stabilizing The pin VIN access+5V voltage of chip, VOUT1 export 1.8V DC voltage, GND pin ground connection, and one of capacitor is input Power filtering capacitor, a termination+5V, one end ground connection, another capacitor be output voltage filter capacitor, connection with this one of them Capacitor.
The present invention is based on the USB switching device of USB Type-C framework, it is under the premise of not sacrificing performance and function, it is complete At the switching between USB Type-C and Lightning interface, signal is converted between USB Type-C and Lightning, complete At the transition of USB Type-C interface substitution Lightning structure.
Detailed description of the invention
Fig. 1 is the circuit diagram that each module of the invention connects.
Fig. 2 is the circuit diagram of USB Type-C module of the present invention.
Fig. 3 is the circuit diagram of signal conversion module of the present invention.
Fig. 4 is the circuit diagram of the chip of conversion module of the present invention.
Fig. 5 is the circuit diagram of power regulator module of the present invention.
Fig. 6 is the circuit diagram of level identification module of the present invention.
Fig. 7 is the circuit diagram of Lightning module of the present invention.
Specific embodiment
It please refers to shown in Fig. 1-Fig. 6, the present invention provides a kind of USB switching device based on USB Type-C framework, packet Include USB Type-C module, signal conversion module, level identification module, Lightning module and power regulator module.
It please refers to shown in Fig. 2, USB Type-C module is produced for USB Type-C end signal of transferring, and is completed positive and negative The signal configuration of insertion identification comprising USB Type-C connector a J1, resistance a R1, a capacitor C4；By USB The power supply signal Vbus of Type-C transfers out from USB Type-C connector J1, as+5V power supply, is filtered by shunt capacitance C4 For the power supply of equipment and completion charge function after wave, circuit is constituted with the GND of USB Type-C connector J1；Resistance R1 connection Other end connection+the 5V of signal pins CC1 above USB Type-C connector J1, resistance R1, complete the knowledge of positive and negative insertion It does not configure, completes the positive and negative insertions function of USB Type-C, be used for from the extraction of the DN and DP pin of USB Type-C connector J1 The data-signal DN and DP of the USB2.0 of transmission.
It please refers to shown in Fig. 3 and Fig. 4, signal conversion module is complete by differential path configuration chip (model PI2USB3121) At chip functions circuit diagram is as shown in Figure 4.
This chip A0+ and A0- is correspondingly connected with the differential signal DN and DP of device J1；B0+ and B0- corresponds to the difference of Lightning Sub-signal L0N and L0P；C0+ and C0- corresponds to the differential signal L1N and L1P of Lightning；VDD pin is that the power supply of chip is drawn Foot meets the VOUT pin of power module of voltage regulation, i.e. 1.8V；SEL pin connects the SEL pin of level identification module；The work of chip Process is as follows:
Function SEL pin (switch)
A to B L
A to C H
A0+ and A0- and the channel B0+ and B0- are opened when SEL pin is low level, that is to say, that DN and DP and LON and Signal transmission is completed in L0P conducting, on the contrary then corresponding with C-channel.
It please refers to shown in Fig. 5, power regulator module, which carries filter capacitor by 1.8V voltage stabilizing chip, to be completed to convert+5V voltage For+1.8V DC power supply, power for giving differential path to configure chip；Power regulator module includes a voltage stabilizing chip AMS1117-1.8V and two capacitor C1, C2；The pin VIN access+5V voltage of voltage stabilizing chip, VOUT1 export 1.8V direct current Pressure, GND pin ground connection；One of capacitor C1 is input power filter capacitor, a termination+5V, one end ground connection；Another capacitor C2 is output voltage filter capacitor, and connection is the same as one of capacitor C1.
It please refers to shown in Fig. 6, level identification module circuit is completed primarily to SEL pin configuration logic level The positive and negative insertion of Lightning interface identifies that circuit includes a single channel comparator (model TLV3201), a filtering Capacitor C3；The function of comparator chip is as follows:
A: when ACC_ID is able to detect that, the voltage of IN+ is greater than IN-；Permanent IN- ground connection is 0V；OUT exports 5V electricity Pressure, SEL pin are high level H.
B: when can't detect ACC_ID, the voltage of IN+ is equal to IN-；Because both not exporting, OUT at this time 0V is exported, then SEL pin is low level L.
It please referring to shown in Fig. 7, Lightning module is the signal pins configuration of Lightning base, by Lightning connector J2 composition, including two pairs of differential data signals, a positive and negative insertion identification signal ACC_ID, with And power supply signal Vbus(+5V) and GND；When the insertion of front, the ACC_ID of male seat by LD1 entering signal conversion module, I.e. front is inserted as that ACC_ID, corresponding SEL pin high level can be recognized；Reverse side insertion is then exactly the opposite, due to LD0 pin Vacantly, therefore identification is less than ACC_ID, corresponding SEL pin low level.
Although for illustrative purposes, the preferred embodiment of the present invention is had been disclosed, but the ordinary skill people of this field Member will realize without departing from the scope and spirit of the invention as disclosed by the appended claims, various to change Into, increase and replace be possible.

Claims (1)

1. a kind of USB switching device based on USB Type-C framework comprising USB Type-C module, signal conversion module, Level identification module, Lightning module and power regulator module,
The USB Type-C module is produced for USB Type-C end signal of transferring, and completes the signal of positive and negative insertion identification Configuration, the USB Type-C module include a connector, a resistance, a capacitor, the power supply signal of USB Type-C It transfers out from connector, as+5V power supply, the power supply of equipment is used for after filtering by shunt capacitance and completes charge function, Circuit is constituted with the GND of connector, resistance one end connects the signal pins on connector, and other end connection+5V power supply is completed just The identification configuration that anti-plug enters, completes the positive and negative insertions function of USB Type-C, draws from DN the and DP pin of connector for passing The data-signal and DP of defeated USB2.0；
The signal conversion module is completed by differential path configuration chip；
The Lightning module includes two pairs of differential data signals, a positive and negative insertion identification signal ACC_ID, and power supply Signal Vbus and GND, when the insertion of front, for the ACC_ID of male seat by LD1 entering signal conversion module, front is inserted as energy ACC_ID is recognized, corresponding SEL pin high level, reverse side insertion is then exactly the opposite, due to LD0 pin floating, identification Less than ACC_ID, corresponding SEL pin low level；
The level identification module gives SEL pin configuration logic level, completes the positive and negative insertion identification of Lightning interface, electricity Flat identification module includes a single channel comparator, and a filter capacitor, the function of comparator chip is as follows:
A: when ACC_ID is able to detect that, the voltage of IN+ is greater than IN-, and permanent IN- ground connection is 0V, and OUT exports 5V voltage, SEL pin is high level；
B: when can't detect ACC_ID, the voltage of IN+ is equal to IN-, because both not exporting, OUT is exported at this time 0V, then SEL pin is low level；
The power regulator module, which carries filter capacitor by 1.8V voltage stabilizing chip, to be completed+5V voltage being converted to+1.8V direct current Source, for giving differential path configuration chip power supply, power regulator module includes a voltage stabilizing chip and two capacitors, voltage stabilizing chip Pin VIN access+5V voltage, VOUT1 export 1.8V DC voltage, GND pin ground connection, one of capacitor be input power Filter capacitor, a termination+5V, one end ground connection, another capacitor are output voltage filter capacitor, and connection is the same as one of electricity Hold.
CN201710342388.7A 2017-11-23 2017-11-23 USB switching device based on USB Type-C framework Active CN107665177B (en)

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CN109239575B (en) * 2018-08-01 2020-12-29 上海移远通信技术股份有限公司 Detection device, detection method and automatic detection system
CN113868175B (en) * 2021-12-06 2022-03-08 苏州浪潮智能科技有限公司 Type-C interface control circuit and Type-C interface
CN114238192B (en) * 2022-02-21 2022-06-03 广州思林杰科技股份有限公司 Control circuit and control method for positive and negative short circuit of TYPEC

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CN205176841U (en) * 2015-12-07 2016-04-20 乐视致新电子科技（天津）有限公司 USB -Type -C interface converter
CN105630724A (en) * 2016-01-27 2016-06-01 深圳慧能泰半导体科技有限公司 USB Type-C system control circuit
CN206292781U (en) * 2016-07-29 2017-06-30 深圳市和昶科技有限公司 A kind of Type C interface adapter
CN206558836U (en) * 2016-11-24 2017-10-13 立讯精密工业（滁州）有限公司 USB connector component

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US10089251B2 (en) * 2016-02-19 2018-10-02 Dell Products L.P. Multi-modal active cable for performing a mode identification operation

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CN205176841U (en) * 2015-12-07 2016-04-20 乐视致新电子科技（天津）有限公司 USB -Type -C interface converter
CN105630724A (en) * 2016-01-27 2016-06-01 深圳慧能泰半导体科技有限公司 USB Type-C system control circuit
CN206292781U (en) * 2016-07-29 2017-06-30 深圳市和昶科技有限公司 A kind of Type C interface adapter
CN206558836U (en) * 2016-11-24 2017-10-13 立讯精密工业（滁州）有限公司 USB connector component

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