An interface circuit, a board card and an electronic device

Abstract

The utility model embodiment provides a kind of interface circuit, board card and electronic equipment, it is related to interface technical field, interface circuit includes selection module and at least one signal conversion module, in the case where selection module is connected with interface with controller, the first interface signal group received by interface can be transmitted to controller, the first interface signal group sent by controller can be output by interface, in the case where selection module is connected with interface with one signal conversion module, the first interface signal group received by interface is converted to second interface signal group by signal conversion module and is transmitted to controller, or the second interface signal group sent by controller is converted to first interface signal group and is output by interface, so that external device can be realized with electronic equipment by one interface Variety interface signal group interaction, satisfy the demand of electronic equipment to variety interface signal group, and the number of interface arranged on the surface of electronic equipment is reduced, so as to reduce the space resource occupied on the surface of electronic equipment.

Claims

1. An interface circuit, characterized in that, include: Select module (10) and at least one signal conversion module (20); The selection module (10) is connected to each of the signal conversion modules (20) respectively. The selection module (10) is used to connect to the interface (30) and the controller (40) of the electronic device respectively, and is configured to select one of the controller (40) and all the signal conversion modules (20) to communicate with the interface (30); The signal conversion module (20) is used to connect to the controller (40), and when the signal conversion module (20) is connected to the interface (30), it converts the first interface signal group received by the interface (30) into a second interface signal group suitable for the controller (40) and transmits it to the controller (40), or converts the second interface signal group sent by the controller (40) into the first interface signal group and outputs it through the interface (30); The controller (40) is also adapted to receive and transmit the first interface signal group.

2. The interface circuit of claim 1, wherein, The selection module (10) includes at least one control unit (11) and a selection unit (12); Each of the control units (11) is connected to the selection unit (12), and the control unit (11) is used to generate and output a selection signal in response to a selection command; The selection unit (12) is connected to each of the signal conversion modules (20) respectively. The selection unit (12) is used to connect to the interface (30) and the controller (40) respectively, and select one of the controller (40) and all the signal conversion modules (20) according to all the selection signals, and connect to the interface (30).

3. The interface circuit of claim 2, wherein, The selection unit (12) includes at least one control terminal, and the control unit (11) has a corresponding control terminal; the control unit (11) includes a first resistor (R1) and a switching device (S1); In the control unit (11), the first end of the first resistor (R1) is used to connect to an external power source, and the second end of the first resistor (R1) is connected to the first end of the switching device (S1) and the corresponding control end of the control unit (11). The second terminal of the switching device (S1) is grounded. The switching device (S1) is used to receive the selection command and to turn on or off according to the selection command. When the switching device (S1) is turned on, the selection signal is at a first level; when the switching device (S1) is turned off, the selection signal is at a second level.

4. The interface circuit of claim 2, wherein, The selection unit (12) includes at least one selection chip (121); the selection chip (121) has a corresponding control unit (11); The selection chip (121) is connected to each signal conversion module (20) and the control unit (11) corresponding to the selection chip (121). The selection chip (121) is used to connect to the interface (30) and the controller (40) respectively, and selects one of the controller (40) and all the signal conversion modules (20) according to the selection signal sent by the control unit (11) corresponding to the selection chip (121) to connect to the interface (30).

5. The interface circuit of claim 4, wherein, The interface (30) includes at least one first signal terminal (30a); the selection chip (121) includes at least one second signal terminal (12a), at least one third signal terminal (12b) and at least one fourth signal terminal (12c); the signal conversion module (20) includes at least one fifth signal terminal (20a); the controller (40) includes at least one sixth signal terminal (40b); The second signal terminal (12a) has a corresponding first signal terminal (30a); the third signal terminal (12b) has a corresponding fifth signal terminal (20a); and the fourth signal terminal (12c) has a corresponding sixth signal terminal (40b). In the selection chip (121), the second signal terminal (12a) is connected to the first signal terminal (30a) corresponding to the second signal terminal (12a), the third signal terminal (12b) is connected to the fifth signal terminal (20a) corresponding to the third signal terminal (12b), and the fourth signal terminal (12c) is connected to the sixth signal terminal (40b) corresponding to the fourth signal terminal (12c).

6. The interface circuit of claim 1, wherein, The interface (30) includes at least one first signal terminal (30a); the selection module (10) includes at least one first line (13), at least one second line (14) and at least one third line (15); the signal conversion module (20) includes at least one fifth signal terminal (20a); the controller (40) includes at least one sixth signal terminal (40b); The first line (13) has a corresponding first signal terminal (30a); the second line (14) has a corresponding fifth signal terminal (20a); the third line (15) has a corresponding sixth signal terminal (40b); the first line (13) has a corresponding second line (14), a corresponding third line (15) and a corresponding external second resistor (R2); The first end (13a) of the first line (13) is connected to the first signal terminal (30a) corresponding to the first line (13), and the second end (13b) of the first line (13) is used to connect to the first end of the second resistor (R2) corresponding to the first line (13); the first end (14a) of the second line (14) is connected to the fifth signal terminal (20a) corresponding to the second line (14); the first end (15a) of the third line (15) is connected to the sixth signal terminal (40b) corresponding to the third line (15); The selection module (10) is configured to select one of the second end (14b) of the second line (14) corresponding to the first line (13) and the second end (15b) of the third line (15) and connect it to the second end of the second resistor (R2) corresponding to the first line (13).

7. The interface circuit of any one of claims 1 to 6, wherein, The selection module (10) includes at least one seventh signal terminal; the signal conversion module (20) includes at least one fifth signal terminal (20a) and at least one eighth signal terminal (20b); the controller (40) includes at least one ninth signal terminal (40a); The fifth signal terminal (20a) has a corresponding seventh signal terminal, and the eighth signal terminal (20b) has a corresponding ninth signal terminal (40a); The fifth signal terminal (20a) is connected to the seventh signal terminal corresponding to the fifth signal terminal (20a), and the eighth signal terminal (20b) is connected to the ninth signal terminal (40a) corresponding to the eighth signal terminal (20b).

8. The interface circuit of any one of claims 1 to 6, wherein, The interface circuit also includes a power module (50); The power module (50) is used to connect to the interface (30) and the power port of the electronic device respectively, and to convert the first power supply signal received by the interface (30) into voltage and output it through the power port, or to convert the second power supply signal output by the electronic device through the power port into voltage and output it through the interface (30).

9. A board card characterized by, Includes the interface circuit as described in any one of claims 1 to 8.

10. An electronic device, characterized in that, It includes the interface circuitry as described in any one of claims 1 to 8, or the board as described in claim 9.

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