TWI738556B - Detecting and disaplying system for universal serial bus port - Google Patents

Abstract

A detecting and displaying system for universal serial bus is disclosed in the present invention. The detecting and displaying system includes a switch, a battery, a first detecting chip, a second detecting chip, a first displaying device, a second displaying device, a third displaying device, and a fourth displaying device. The switch is utilized to switch in a first condition, a second condition, and a third condition. The first detecting chip, the first displaying device, and the second displaying device are utilized to detect and display a voltage and a current of a universal serial bus 2.0 port or a universal serial bus 3.0 port. The second detecting chip, the third displaying device, and the fourth displaying device are utilized to detect and display a voltage and a current of the battery. In the third condition, the fourth displaying device is also utilized to display a short circuit current.

Description

USB port detection and display system

The present invention relates to a system, in particular to a USB port detection and display system.

With the advancement of technology and the development of computer systems, Universal Serial Bus (USB, hereinafter referred to as USB) has been widely used in electronic products such as computers and mobile devices. The USB version has gradually developed from the original USB1.0 to USB4. At this stage, USB2.0 and USB3.0 are still the most common.

Generally speaking, USB2.0 port and USB3.0 port need to go through some tests during manufacturing to test whether the USB2.0 port and USB3.0 port can work normally, whether the USB2.0 function is normal, short-circuit current, protection Whether the function is normal, etc. However, in the previous technology, when testing the USB2.0 port and USB3.0 port, it may be necessary to connect an external mouse or other device with USB, and determine whether the mouse or the device is operating normally To judge the test results, the test process is more cumbersome, and the test results cannot be obtained intuitively. Therefore, there is room for improvement in the prior art.

In view of the fact that in the prior art, the process of testing the USB2.0 port and the USB3.0 port is relatively cumbersome, the test results cannot be obtained intuitively, and various problems derived therefrom. One of the main objectives of the present invention is to provide a USB port detection and display system to solve at least one of the problems in the prior art.

In order to solve the problems of the prior art, the necessary technical means adopted by the present invention is to provide a USB port detection and display system, which is electrically connected to a USB2.0 port and a USB3.0 port, and includes a switch, a built-in battery, A first test chip, a second test chip, a first display, a second display, a third display, and a fourth display.

The switch is used to be operated to switch between a first state, a second state and a third state. The built-in battery has a built-in power, and when the switch is switched to the second state, the built-in power is supplied to the USB3.0 port. The first detection chip is electrically connected to the switch, the built-in battery, the USB2.0 port and the USB3.0 port, for when the switch is switched to the first state, the built-in power and an electrical connection to the USB2.0 port Power is supplied by one of the external power supplied by the external power supply of the USB3.0 port, and the external power is detected. The second detection chip is electrically connected to the switch and the built-in battery for powering by one of the above-mentioned built-in power and external power, and detects the built-in power. The first display is electrically connected to the first detection chip, and displays an external current value of an external electric energy flowing through the first detection chip. The second display is electrically connected to the first detection chip and displays an external voltage value of one of the external electric energy. The third display is electrically connected to the second detection chip, and displays a built-in voltage value of one of the built-in electric energy. The fourth display is electrically connected to the second detection chip, and displays the value of the built-in electric current flowing through one of the second detection chips.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the USB port detection and display system, and further includes a first circuit electrically connected to the switch, the built-in battery and the USB3.0 port , Is turned on in the first state, and is used to determine the power supply of one of the above-mentioned built-in electric energy and external electric energy by using the voltage value.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the USB port detection and display system further include a first voltage-stabilizing chip, which is electrically connected to the first circuit and the built-in battery 1. The first test chip and the second test chip are used to stabilize one of the above-mentioned built-in power and external power and supply it to the first test chip and the second test chip.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the USB port detection and display system, and further includes a second circuit electrically connected to the switch, the built-in battery and the USB3.0 port , It is turned on in the second state, and the built-in power is supplied to the USB3.0 port.

Based on the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is that the second circuit in the USB port detection and display system includes a resistor, and one of the resistors has a resistance value of 0.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the USB port detection and display system, which further includes a third circuit electrically connected to the switch, the built-in battery and the USB3.0 port , Turn on in the third state and short-circuit the USB3.0 port.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the third circuit in the USB port detection and display system include an optical coupling element, which is in the third state and has built-in When electric energy flows through, it is turned on, so that the USB3.0 port is short-circuited, and a short-circuit current value when the USB3.0 port is short-circuited is detected by the second detection chip.

On the basis of the above-mentioned necessary technical means, an accessory technical means derived from the present invention is to enable the USB port to detect and display the third circuit in the display system, which further includes a first light-emitting element, which is electrically connected to the optical coupling element and The switch is used to generate a first light beam when the built-in electric energy flows through in the third state.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make a USB port detection and display system, which further includes a microcontroller, a memory chip, an N-type metal oxide semiconductor field effect transistor and A second light emitting element. The microcontroller is electrically connected to the switch, the USB2.0 port and the USB3.0 port, and is used to determine whether one of the USB2.0 ports, the USB2.0 function, is normal when the switch is in a working state and the switch is switched to the first state. And when it is judged that the USB2.0 function is normal, an effective voltage is output. The memory chip is electrically connected to the microcontroller, and is used to store an operating program required for the microcontroller to be in a working state. The N-type metal oxide semiconductor field effect transistor is electrically connected to the microcontroller to be turned on when receiving an effective voltage. The second light-emitting element is electrically connected to the N-type metal oxide semiconductor field effect transistor for receiving an effective voltage and generating a second light beam when the N-type metal oxide semiconductor field effect transistor is turned on by an effective voltage.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the USB port detection and display system further include a second voltage stabilizing chip, which is electrically connected to the USB3.0 port and micro-controller The device and the memory chip are used to stabilize the external power and supply it to the microcontroller and the memory chip.

In summary, the USB port detection and display system provided by the present invention utilizes a switch, built-in battery, first detection chip, second detection chip, first display, second display, third display, and fourth display to switch between In the first state, the second state and the third state of the switch, the first display, the second display, the third display and the fourth display are respectively used to display the voltage and current values. Compared with the prior art, the test results can be obtained more intuitively , It also saves the tedious steps of using a mouse or other USB devices to test. The present invention can also use the built-in battery as an active USB in the second state. In addition, the present invention further uses the first light-emitting element and the second light-emitting element as an auxiliary judgment factor for the short circuit test and the USB2.0 function test.

The specific embodiments of the present invention will be described in more detail below in conjunction with the schematic diagrams. According to the following description and the scope of patent application, the advantages and features of the present invention will be more clear. It should be noted that the drawings all adopt a very simplified form and all use imprecise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

Please refer to the first to fifth figures, where the first figure is a block diagram of the USB port detection and display system provided by the preferred embodiment of the present invention; the second A and second B figures show the preferred embodiment of the present invention Part of the circuit diagram of the USB port detection and display system provided by the embodiment; the third diagram shows another part of the circuit diagram of the USB port detection and display system provided by the preferred embodiment of the present invention; Another part of the circuit diagram of the USB port detection and display system is provided; and the fifth figure shows another part of the circuit diagram of the USB port detection and display system provided by the preferred embodiment of the present invention. As shown in the figure, a USB port detection display system 1 is electrically connected to a USB3.0 port 3 and a USB2.0 port 4.

The USB port detection and display system 1 includes a switch 11, a built-in battery 12, a first detection chip 13, a second detection chip 14, a first display 15, a second display 16, a third display 17, A fourth display 18, a first circuit 19, a first voltage regulator chip 20, a second circuit 21, and a third circuit 22. The USB3.0 port 3 is electrically connected to the first circuit 19, the second circuit 21 and the third circuit 22. The USB 2.0 port 4 is electrically connected to the first detection chip 13.

The switch 11 is electrically connected to the first circuit 19, the second circuit 21, and the third circuit 22 for being operated to switch between a first state, a second state, and a third state, and respectively turn on the first state, a second state, and a third state. A circuit 19, a second circuit 21 and a third circuit 22. The switch 11 is SW1 in the second diagram A (circuit diagram).

The built-in battery 12 has a built-in power and is electrically connected to the first circuit 19, the second circuit 21 and the third circuit 22. Practically speaking, the built-in battery 12 is the Battery in Figure 2A, and the voltage value of the built-in electric energy is 5 volts (Volt).

The first voltage regulator chip 20 is electrically connected to the first circuit 19, the built-in battery 12, the first test chip 13 and the second test chip 14. Practically speaking, the first voltage stabilizer chip 20 is the IC2 in the second diagram A, and the ASM1117 voltage stabilizer chip can be used.

The first display 15 (LED1 in the third figure) and the second display 16 (LED2 in the third figure) are electrically connected to the first detection chip 13. The third display 17 (LED3 in the third figure) and the fourth display 18 (LED4 in the third figure) are electrically connected to the second detection chip 14. Practically speaking, the first inspection wafer 13 is U2 in the second figure B, and the second inspection wafer 14 is U3 in the second figure B. Both of them can use SOP-20 inspection wafers.

When the switch 11 is switched to the first state, that is, the SW1 in the second diagram A is electrically connected to the pin 1 and the pin 2, and the first circuit 19 is turned on. The first circuit 19 includes a diode 191, which is D1 in the second diagram A. At this time, an external power supply is electrically connected to the USB3.0 port 3 and provides an external power. The first circuit 19 uses the voltage value to determine the built-in power and the external power. When the external voltage of the external power cannot be supplied to the first detection chip 13 and the second detection chip 14 to operate, the built-in power of the built-in battery 12 (internal The built-in voltage value is 5V) will be stabilized by the first voltage regulator chip 20 and supplied to the first test chip 13 and the second test chip 14; when the external voltage value of the external power is sufficient to supply the first test chip 13 and the second test chip When the chip 14 is operating, external power is regulated by the first voltage regulator chip 20 and supplied to the first test chip 13 and the second test chip 14. In this embodiment, the voltage stabilized by the first stabilized chip 20 is approximately 3.3 volts.

At this time, the first detection chip 13 detects the external voltage value of the external power and an external current value of the external power flowing through the first detection chip 13. According to Fig. 2A, when external power is supplied from the USB3.0 port 3, the external voltage value detected by the first detection chip 13 is essentially the USB port voltage value of the USB3.0 port 3. In addition, when the external power supply is electrically connected to the USB2.0 port 4, the external power is supplied from the USB2.0 port 4. The external voltage value detected by the first detection chip 13 is essentially the USB of the USB2.0 port 4. Port voltage value. The first display 15 will display the external current value, and the second display 16 will display the external voltage value. Therefore, through the first display 15 and the second display 16, the external voltage value (USB port voltage value) and the external current value can be intuitively known.

The second detection chip 14 is used to detect the built-in voltage value of the built-in power and a built-in current value of the built-in power flowing through the second detection chip 14. To put it simply, the second inspection chip 14 is mainly used to inspect the built-in battery 12. The third display 17 is used to display the built-in voltage value, and the fourth display 18 is used to display the built-in current value. Therefore, with the third display 17 and the fourth display 18, the current voltage status of the built-in battery 12 and the current status flowing through the second detection chip 14 can be intuitively known.

In this embodiment, the first display 15 and the second display 16 are seven-segment displays, and are respectively electrically connected to the pins of the first detection chip 13 (the third figure and the second figure B). The connection mode is common knowledge in the technical field, and the diagram is only for illustration. For a brief example, the three pins counted from the right of LED2 (second display 16) in the third figure will be sequentially and electrically connected to P2.3 of U2 (first detection chip 13) in the second B figure. , P2.4 and P2.0 pins. In the same way, the third display 17, the fourth display 18 and the second detection chip 14 are also the same, so they will not be repeated here.

In this embodiment, the USB port detection and display system 1 further includes a microcontroller 23, a memory chip 24, and an N-type Metal-Oxide-Semiconductor Field-Effect Transistor. , Hereinafter referred to as NMOS) 25, a second light-emitting element 26, a second voltage stabilizing chip 27, a reset circuit 28, and an external Oscillator circuit 29.

The second voltage stabilizing chip 27 is electrically connected to the USB 3.0 port 3 for voltage stabilization of external power and then supplying the voltage to the microcontroller 23 and the memory chip 24. The second voltage stabilizing chip 27 is the IC3 in the fourth figure, and the ASM1117 voltage stabilizing chip can be used.

The microcontroller 23 is electrically connected to the memory chip 24, the NMOS 25, the reset circuit 28 and the external crystal oscillator circuit 29, and is used to detect the status of the USB 2.0 port 4 when it is in a working state and the switch 11 is switched to the first state. 1. Whether the USB2.0 function is normal. In more detail, the microcontroller 23 will execute an operating program stored in the memory chip 24 and determine whether the signal terminals (D+ and D-) in the USB 2.0 port 4 are normal. When the microcontroller 23 determines that the signal terminal in the USB 2.0 port 4 is normal, it will output an effective voltage. The effective voltage turns on the NMOS 25 and flows through the second light-emitting element 26. Therefore, the second light-emitting element 26 generates a second light beam. When the inspector sees the second light beam, it can be known that the USB2.0 function of the USB2.0 port 4 is normal.

Practically speaking, the microcontroller 23 is U1 in the fourth figure, and the EM78P447AP microcontroller can be used. The microcontroller 23 outputs an effective voltage from one of the pins, as shown in the second P6.7 pin numbered from the bottom left of U1 in the third figure. The reset circuit 28 is electrically connected to the RESET pin as shown in the third figure. The external crystal oscillator circuit 29 is electrically connected to the OSCI pin and the OSCO pin in the fourth figure. NMOS25 is Q1 in the fifth figure. The second light emitting element 26 is D5 in the fifth figure, which is a blue light emitting diode (Light Emitting Diode; LED).

When the switch 11 is switched to the second state, that is, SW1 in the second diagram A is electrically connected to the pin 2 and the pin 3, and the second circuit 21 is turned on. The second circuit 21 includes a resistor 211 with a resistance value of 0. Therefore, the built-in power of the built-in battery 12 is supplied to the USB 3.0 port 3 through the second circuit 21. At this time, the USB port detection display system 1 can be used as an active USB and used in some tests. It should be noted that the voltage values displayed by the second display 16 and the third display 17 at this time will be the same, and they are actually the built-in voltage values of the built-in electric energy. The resistor 211 is R12 in the second diagram A.

When the switch 11 is switched to the third state, that is, SW1 in the second diagram A is electrically connected to the pin 3 and the pin 4, and the third circuit 22 is turned on. The third circuit 22 includes an optical coupling element 221 and a first light-emitting element 222. The built-in electric energy of the built-in battery 12 will flow through and conduct the optical coupling element 221. As can be seen in Figure 2A, the VBUS of the USB3.0 port 3 will be grounded. Therefore, the USB3.0 port 3 will be short-circuited. It should be noted that, at this time, the second detection chip 14 detects a short-circuit current when the USB 3.0 port 3 is short-circuited, and the fourth display 18 displays the short-circuit current. The third display 17 still displays the built-in voltage value of the built-in electric energy, which can also be regarded as detecting the voltage condition of the built-in battery 12. Therefore, through the third display 17 and the fourth display 18, the short-circuit current value and the current voltage status of the built-in battery 12 can be intuitively known.

In this embodiment, the first light-emitting element 222 (that is, D4 in the second picture A) is located between the light coupling element 221 (that is, U4 in the second picture A) and the built-in battery 12. When flowing through the first light-emitting element 222, the first light-emitting element 222 generates a first light beam. Therefore, the inspector can know that the built-in electrical energy smoothly flows through the optical coupling element 221, which causes the USB 3.0 port 3 to be short-circuited. If the first light-emitting element 222 does not generate the first light beam, the fourth display 18 may not display the short-circuit current value at this time. Therefore, the first light beam generated by the first light-emitting element 222 can also be used as an auxiliary judgment basis for the detector. In this embodiment, the first light emitting element 222 is a red light emitting diode (LED). The function of the optical coupling element 221 is to isolate signals, and a PC817 optocoupler can be used.

It should be noted that in the second A, second B, fourth and fifth diagrams, the circuit diagrams cannot be drawn into one diagram, so they are divided. Among them, the circle A, the circle B, and the circle C , Circle D, circle a, circle b, circle c, circle d, and circle e are the connections between the patterns. In the actual circuit diagram, the circle a can be marked with VBUS, the circle b can be marked with VCCP3V3, and the circle c can be marked with P3V3, the circle d in the fourth figure can be marked as LED OUT, and the circle d in the fifth figure is It is LED IN. The circle e in the second figure A can be marked as a specific alphanumeric OUT and the circle e in the second figure B can be marked as a specific alphanumeric IN. This is common knowledge in the technical field, so it is not Give details.

In addition, the second A to the fifth diagram are one of the implementation circuit diagrams of the preferred embodiment of the present invention. The component symbols of the present invention have been additionally marked on the circuit diagrams (the second A to the fifth diagrams). Therefore, the circuit diagrams are both Some numbers and numbers, such as: the pins of each chip, the pins of the display, the pins of the switches, the input and output terminals of each chip, the common code of each circuit component, the model used by each component, etc., belong to this technology The common knowledge in the field will no longer be described, nor will it be sorted into the symbol description, so as to avoid confusion, hereby explain.

In summary, the USB port detection and display system provided by the present invention uses a switch to switch between the first state, the second state and the third state, and uses the first detection chip, the second detection chip, the first display, The second display, the third display, and the fourth display detect and display the voltage value and the current value. Compared with the prior art, the test result can be obtained more intuitively, and the cumbersome steps of using a mouse or other USB devices to test can be omitted. The present invention can also use the built-in battery as an active USB in the second state. In addition, the present invention further uses the first light-emitting element and the second light-emitting element as an auxiliary judgment factor for the short circuit test and the USB2.0 function test.

Through the detailed description of the above preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and equivalent arrangements within the scope of the patent for which the present invention is intended.

1: USB port detection and display system 11: Toggle switch 12: Built-in battery 13: The first inspection wafer 14: Second inspection wafer 15: The first display 16: second display 17: The third display 18: The fourth display 19: The first circuit 191: Diode 20: The first voltage regulator chip 21: The second circuit 211: Resistance 22: The third circuit 221: optical coupling element 222: The first light-emitting element 23: Microcontroller 24: Memory chip 25: N-type metal oxide semiconductor field effect transistor (NMOS) 26: second light-emitting element 27: The second voltage regulator chip 28: Reset circuit 29: External crystal oscillator circuit 3: USB3.0 port 4: USB2.0 port

The first figure is a block diagram showing the USB port detection and display system provided by the preferred embodiment of the present invention; The second diagram A and the second diagram B show partial circuit diagrams of the USB port detection and display system provided by the preferred embodiment of the present invention; The third figure shows another part of the circuit diagram of the USB port detection and display system provided by the preferred embodiment of the present invention; The fourth figure shows another part of the circuit diagram of the USB port detection and display system provided by the preferred embodiment of the present invention; and The fifth figure shows another part of the circuit diagram of the USB port detection and display system provided by the preferred embodiment of the present invention.

1: USB port detection and display system

11: Toggle switch

12: Built-in battery

13: The first inspection wafer

14: Second inspection wafer

15: The first display

16: second display

17: The third display

18: The fourth display

19: The first circuit

20: The first voltage regulator chip

21: The second circuit

22: The third circuit

23: Microcontroller

24: Memory chip

25: N-type metal oxide semiconductor field effect transistor (NMOS)

26: second light-emitting element

27: The second voltage regulator chip

28: Reset circuit

29: External crystal oscillator circuit

3: USB3.0 port

4: USB2.0 port

Claims (9)

A USB port detection and display system is electrically connected to a USB2.0 port and a USB3.0 port, and includes: a switch for being operated in a first state, a second state, and a third state Switch between states; a built-in battery has a built-in power, and when the switch is switched to the second state, the built-in power is supplied to the USB3.0 port; a first detection chip, The switch is electrically connected to the switch, the built-in battery, the USB2.0 port and the USB3.0 port, so that when the switch is switched to the first state, the built-in power is electrically connected to One of the external power supplied by the USB2.0 port and the external power supply of the USB3.0 port is powered and detects the external power; a second detection chip is electrically connected to the switch and the internal The built-in battery is used to supply power by one of the above-mentioned built-in power and the external power and detect the built-in power; a first display is electrically connected to the first detection chip and displays the external power flow An external current value through the first detection chip; a second display, which is electrically connected to the first detection chip, and displays an external voltage value of the external power; a third display, which is electrically connected to the second Test the chip and display a built-in voltage value of the built-in power; a fourth display is electrically connected to the second test chip and displays a built-in current value of the built-in power flowing through the second test chip And a first circuit electrically connected to the switch, the built-in battery and the The USB3.0 port is turned on in the first state, and is used to determine the power supply of one of the built-in electric energy and the external electric energy by using the voltage value. The USB port detection and display system according to claim 1, further comprising a first voltage regulator chip, the first voltage regulator chip is electrically connected to the first circuit, the built-in battery, the first detection chip and the second Two test chips are used to stabilize one of the built-in power and the external power and supply them to the first test chip and the second test chip. The USB port detection and display system according to claim 1, further comprising a second circuit, the second circuit is electrically connected to the switch, the built-in battery and the USB3.0 port, and is turned on in the second state , And supply the built-in power to the USB3.0 port. The USB port detection and display system according to claim 3, wherein the second circuit includes a resistor, and a resistance value of the resistor is 0. The USB port detection and display system according to claim 1, further comprising a third circuit which is electrically connected to the switch, the built-in battery and the USB3.0 port, and is turned on in the third state , And short-circuit the USB3.0 port. The USB port detection and display system according to claim 5, wherein the third circuit includes an optical coupling element, and the optical coupling element is turned on when the built-in electric energy flows in the third state, so that the USB3 .0 port is short-circuited, and a short-circuit current value when the USB3.0 port is short-circuited is detected by the second detection chip. The USB port detection and display system according to claim 6, wherein the third circuit further includes a first light-emitting element, and the first light-emitting element is electrically connected to the optical coupling element and the switch, so that the third circuit In the state and when the built-in electric energy flows through, a first light beam is generated. The USB port detection and display system as described in claim 1, further comprising: a microcontroller, which is electrically connected to the switch, the USB2.0 port and the USB3.0 port, to be in a working state and the When the switch is switched to the first state, it is judged whether one of the USB2.0 ports USB2.0 function is normal, and when it is judged that the USB2.0 function is normal, an effective voltage is output; a memory chip is electrically connected to the The microcontroller is used to store an operating program required by the microcontroller in the working state; an N-type metal oxide semiconductor field effect transistor is electrically connected to the microcontroller for receiving the valid Is turned on when the voltage is applied; and a second light-emitting element is electrically connected to the N-type metal oxide semiconductor field effect transistor for operating in the N-type metal oxide semiconductor field When the effective transistor is turned on by the effective voltage, it receives the effective voltage and generates a second light beam. The USB port detection and display system according to claim 8, further comprising a second voltage regulator chip, the second voltage regulator chip is electrically connected to the USB3.0 port, the microcontroller and the memory chip for The external power is regulated and supplied to the microcontroller and the memory chip.

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