CN101266536B - Detection device - Google Patents

Abstract

A detection device is arranged on a mainboard and used for detecting the connection between an external device and a socket. The detection device comprises: a control chip, a pull-up element, a socket and a detection chip. The detection device is provided with a plurality of electric leads which are divided into a first part, a second part and a third part, wherein the first part is connected to the control chip and used for receiving and transmitting data, the second part is connected to a first voltage, and the pull-up element is connected between the third part and a second voltage. The detection chip has an input pin connected to the third portion. Wherein the third portion is maintained at the second voltage when the external device is not connected to the socket and is not maintained at the second voltage when the external device is connected to the socket. The invention can detect the insertion of the external storage device into the SATA interface socket in real time by selecting any one of three grounding electric leads defined by the existing SATA interface, and does not use BIOS to detect the insertion of the external storage device.

Description

Detection device

technical field

The invention relates to a detection device, and in particular to a detection device capable of detecting a serial advanced technology attachment (serial advanced technology attachment, referred to as SATA) interface socket connected to an external device.

Background technique

Early storage media, such as hard disks or optical drives, used the Advanced Technology Attachment (ATA) interface to exchange data with the host. The data of the ATA interface was transmitted in parallel, so it was called Called the PATA interface. Recently, the Serial Advanced Technology Attachment (SATA) interface has gradually taken the PATA interface as the main interface between the storage medium and the host.

Please refer to FIG. 1A , which is a perspective view of a SATA interface connector (connector). The SATA interface connector includes a SATA interface plug (plug) 120 and a SATA interface socket (jack) 100 . Wherein, there are two openings in the SATA interface socket (jack) 100, and a SATA interface plug (plug) 120 can be inserted into any opening.

Furthermore, there are seven electrical wires in the opening of the SATA interface jack 100 . According to the specification of the SATA interface socket (jack) 100, the first, fourth, and seventh electrical wires in the opening are longer and are defined as grounding electrical wires; moreover, the second and third electrical wires between the first and fourth electrical wires are defined as The transmission wire (Tx); the fifth and sixth wires between the fourth and seventh wires are defined as receiving wires (Rx). The SATA interface plug 120 also has seven electrical wires that can contact the seven electrical wires in the opening of the SATA interface socket (jack) 100 to form an electrical connection.

Furthermore, the cable 122 of the SATA interface plug 120 contains two electromagnetic shielding metals (electromagnetic shielding metal) 124, 126, and these two electromagnetic shielding metals 124, 126 are connected to the first, fourth, The seven electrical conductors are connected, that is, the two electromagnetic shielding metals 124, 126 are connected to the ground electrical conductor. Furthermore, the two electromagnetic shielding metals 124, 126 respectively include two transmission wires (Tx) and two reception wires (Rx), so that the transmission wires (Tx) and the reception wires (Rx) are not affected by the electromagnetic field. interference, and can increase the speed of data transmission and reception.

Please refer to FIG. 1B , which is a connection diagram of the SATA interface socket on the motherboard and the control chip. FIG. 1C shows the circuit connection diagram between the control chip, the SATA interface connector and the storage device. Wherein, the control chip 130, such as the south bridge chip, has two transmitting terminal pins (Tx) and two receiving terminal pins (Rx) respectively connected to the second, third, fifth and sixth electrical wires of the SATA interface socket 100 . Furthermore, the first, fourth and seventh electrical wires of the SATA interface socket 100 are directly connected to the ground layer on the motherboard.

Moreover, when the power supply (Vcc) of the computer system is transmitted to the storage device 140 via the power connection line, as long as the SATA interface plug 120 connected to the storage device 140 is inserted into the SATA interface socket 100, the storage device 140 and the control chip 130 are connected. Connection.

It can be known from the above that the SATA interface specification only defines four signal lines (two transmission lines (Tx) and two reception lines (Rx)) and three ground lines, and there are no redundant lines available. Therefore, when the user inserts the storage device 140 into the SATA interface socket 100 on the motherboard 150 , the computer system cannot immediately detect that the storage device 140 is installed into the computer system. That is to say, even if the storage device 140 has been inserted into the SATA interface socket 100 , since the SATA interface specification does not provide an additional detection pin, the computer system cannot know in real time that the storage device 140 has been installed on the computer system.

Therefore, in order to know whether the storage device 140 is inserted into the known computer system, it is generally detected by using the basic input output system (BIOS for short) in the computer system. That is to say, when the computer system is turned on and the BIOS is activated, the BIOS must first initialize the control chip 130 . After the control chip 130 is successfully initialized, the control chip 130 will send an inquiry command through the SATA interface. When the inquiry command has a response (response), it means that the storage device 140 is connected to the SATA interface. On the contrary, if the control chip 130 still does not receive a reply after a predetermined time, it means that the storage device is not inserted into the SATA interface.

It can be known from the above that the computer system must spend a long time to detect whether the storage device 140 is inserted into the SATA interface. Furthermore, the above-mentioned detection method is limited to the process of starting the computer system. After the computer system is turned on, if a storage device 140 is inserted into the SATA interface socket 100, the computer system cannot know it, and it must be detected after the computer system is turned on again.

Contents of the invention

The present invention proposes a detection device, which is located on a main board and detects the connection with an external device, including: a control chip; a pull-up element; a socket with a plurality of electric wires, which are divided into a first part and a second part. part and a third part, the first part is connected to the control chip for receiving and transmitting data, the second part is connected to a first voltage, and a pull-up element is connected between the third part and a second voltage; and, a The detection chip has an input pin connected to the third part; wherein when the external device is not connected to the socket, the third part is maintained at the second voltage, and when the external device is connected to the socket, the third part is not maintained at the second voltage .

The present invention proposes a detection device, which is located on a main board and detects the connection with an external device, including: a control chip; a pull-up element; a socket with a plurality of electric wires, which are divided into a first part and a second part. part and a third part, the first part is connected to the control chip for receiving and transmitting data, the second part is connected to a first voltage, and a pull-up element is connected between the third part and a second voltage; an electronic switch , connected between the third part and the first voltage; and, a detection chip with an input pin connected to the third part; wherein when the external device is not connected to the socket, the electronic switch makes the third part and The first voltage is not connected, and the third part is maintained at the second voltage. When the external device is connected to the socket, the electronic switch connects the third part to the first voltage, and the third part maintained at the first voltage.

The present invention selects one of the three grounding wires defined by the existing SATA interface, and can detect in real time that the external storage device is inserted into the SATA interface socket, without using the BIOS to detect the insertion of the external storage device.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the drawings are only for reference and illustration, and are not intended to limit the present invention.

Description of drawings

FIG. 1A is a perspective view of a SATA interface connector.

FIG. 1B is a connection diagram between the SATA interface socket and the control chip on the motherboard.

FIG. 1C is a circuit connection diagram between the control chip, the SATA interface connector and the storage device.

FIG. 2 shows a detection device and an external device with a detection function according to a second embodiment of the present invention.

FIG. 3 shows a detection device and an external device with a detection function according to a second embodiment of the present invention.

Detailed ways

Please refer to FIG. 2 , which shows a detection device with a detection function and an external device according to a first embodiment of the present invention. The detection device includes a control chip 230 , a pull-up element (such as a resistor R), a socket 200 and a detection chip 260 . In order to be able to detect that the storage device is inserted into the SATA interface socket 200 in real time, the present invention selects one of the three grounding wires defined by the SATA interface, for example, the first grounding wire. After that, the first grounding wire in the SATA interface socket 200 is connected to a power supply voltage (Vcc) through a pull up device (pull up device), such as a pull up resistor (pull up register, R), and the first A ground wire can be regarded as a detection pin (DET).

Furthermore, the connection relationship of other electrical wires on the SATA interface socket 200 does not change. That is to say, the control chip 230, for example, the two transmission terminal pins (Tx) and the two receiving terminal pins (Rx) on the south bridge chip are respectively connected to the second, third, fifth and sixth terminals of the SATA interface socket 200. wire. Furthermore, the fourth and seventh electrical wires of the SATA interface socket 100 are directly connected to the ground layer on the motherboard.

According to the first embodiment of the present invention, an input and output pin (I/O pin) of a detection chip 260 can be used on the motherboard to be connected to the detection pin (DET), so that the detection chip 260 can (DET) to know whether the storage device 240 is inserted into the SATA interface socket 200. Furthermore, the detection chip 260 can be a super I/O device (Super I/O device) or a general purpose I/O device (general purpose I/P, GPIO) or a south bridge chip on the motherboard.

Obviously, when the storage device 240 is not inserted into the SATA interface socket 200, the detection pin (DET) of the SATA interface socket 200 will be pulled up (pull up) to a high level; otherwise, when the storage device 240 is inserted into the SATA interface socket 200 At this time, since the first grounding wire of the SATA interface plug 220 is connected to the ground voltage, the detection pin (DET) of the SATA interface socket 200 will be pulled down (pull down) to a low level. The detection chip 260 can determine that the storage device 240 has been inserted into the SATA interface socket 200 according to the low level of the detection pin (DET), and notify the computer system.

It can be seen from the above description that when the storage device 240 is inserted into the SATA interface socket 200 , since the SATA interface plug 220 and the first grounding wire of the SATA interface socket 200 are connected to the ground voltage, it conforms to the definition of the SATA interface. Although the SATA interface socket 200 does not meet the definition of the SATA interface when the storage device 240 is not inserted into the SATA interface socket 200 , there is no problem because there is no storage device connected thereto.

Please refer to FIG. 3 , which shows a detection device with a detection function and an external device according to a second embodiment of the present invention. Compared with the first example, the second embodiment provides an electronic electronic switch (switch) 235 connected between the detection pin (DET) and the ground voltage, and a control terminal of the electronic electronic switch 235 is also connected to the detection pin bit (DET). The action principle of the electronic electronic switch 235 is similar to a switch, and the switch can act according to the level on the detection pin (DET). When the detection pin (DET) is low level, the electronic switch 235 is in a closed state (close state), and the detection pin (DET) is connected to the ground voltage; otherwise, when the detection pin (DET) is high level , the electronic switch 235 is in an open state (open state), and will not connect the detection pin (DET) to the ground voltage.

Obviously, when the storage device 240 is plugged into the SATA interface socket 200, the detection pin (DET) is at a low level, therefore, the current (I) generated by the voltage source (Vcc) through the pull-up resistor (R) is no longer The first grounding wire of the SATA interface socket 200 is transmitted to the storage device 240 , but is transmitted to the ground voltage through the electronic switch 235 . Therefore, the second embodiment of the present invention will not affect the data transmission and reception speeds of the SATA interface except that it conforms to the specification of the SATA interface.

In summary, although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined by the claims.

Claims (13)

1. a pick-up unit is positioned at motherboard, and detection is connected with external device (ED), it is characterized in that, comprising:

Control chip;

On draw element;

List type advances rank technology additional interface socket, have a plurality of electrical leads, be divided into first, second portion and third part, above-mentioned first is connected to above-mentioned control chip, in order to receive and Data transmission, above-mentioned second portion is connected to first voltage, and is connected between above-mentioned third part and second voltage and draws element on above-mentioned; And

Detection chip has the input pin position and is connected to above-mentioned third part;

Wherein above-mentioned first voltage is ground voltage, above-mentioned second voltage is supply voltage, when the said external device does not connect above-mentioned list type and advances rank technology additional interface socket, above-mentioned third part maintains above-mentioned second voltage, when the said external device connected above-mentioned list type and advances rank technology additional interface socket, above-mentioned third part did not maintain above-mentioned second voltage.

2. pick-up unit according to claim 1 is characterized in that, drawing element on wherein above-mentioned is pull-up resistor.

3. pick-up unit according to claim 1 is characterized in that, wherein above-mentioned first comprises the transmission electrical lead and receives electrical lead.

4. pick-up unit according to claim 1 is characterized in that, wherein above-mentioned control chip is a South Bridge chip.

5. pick-up unit according to claim 1 is characterized in that, wherein above-mentioned detection chip is super input-output unit, universal input-output unit or South Bridge chip.

6. pick-up unit according to claim 1 is characterized in that, wherein when the said external device connected above-mentioned list type and advances rank technology additional interface socket, above-mentioned third part became above-mentioned first voltage by above-mentioned second voltage.

7. device according to claim 1 is characterized in that, wherein the said external device is hard disk or CD-ROM drive.

8. a pick-up unit is positioned at motherboard, and detection is connected with external device (ED), it is characterized in that, comprising:

Control chip;

On draw element;

List type advances rank technology additional interface socket, have a plurality of electrical leads, be divided into first, second portion and third part, above-mentioned first is connected to above-mentioned control chip, in order to receive and Data transmission, above-mentioned second portion is connected to first voltage, and is connected between above-mentioned third part and second voltage and draws element on above-mentioned;

Electronic switch is connected between above-mentioned third part and above-mentioned first voltage; And

Detection chip has the input pin position and is connected to above-mentioned third part;

Wherein above-mentioned first voltage is ground voltage, above-mentioned second voltage is supply voltage, when the said external device does not connect above-mentioned list type and advances rank technology additional interface socket, above-mentioned electronic switch makes between above-mentioned third part and above-mentioned first voltage and is not connected, above-mentioned third part maintains above-mentioned second voltage, when the said external device connects above-mentioned list type and advances rank technology additional interface socket, above-mentioned electronic switch makes between above-mentioned third part and above-mentioned first voltage and is connected, and above-mentioned third part maintains above-mentioned first voltage.

9. pick-up unit according to claim 8 is characterized in that, drawing element on wherein above-mentioned is pull-up resistor.

10. pick-up unit according to claim 8 is characterized in that, wherein above-mentioned first comprises the transmission electrical lead and receives electrical lead.

11. pick-up unit according to claim 8 is characterized in that, wherein above-mentioned control chip is a South Bridge chip.

12. pick-up unit according to claim 8 is characterized in that, wherein above-mentioned detection chip is super input-output unit, universal input-output unit or South Bridge chip.

13. pick-up unit according to claim 8 is characterized in that, wherein the said external device is hard disk or CD-ROM drive.

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