CN202385070U - Double-purpose communication card - Google Patents
Double-purpose communication card Download PDFInfo
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- CN202385070U CN202385070U CN2011205468753U CN201120546875U CN202385070U CN 202385070 U CN202385070 U CN 202385070U CN 2011205468753 U CN2011205468753 U CN 2011205468753U CN 201120546875 U CN201120546875 U CN 201120546875U CN 202385070 U CN202385070 U CN 202385070U
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- interface
- mcu
- controller
- communication card
- purpose communication
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Abstract
The utility model discloses a double-purpose communication card, which comprises an MCU (microprogrammed control unit), a CAN (controller area network) controller, a CAN transceiver, a CAN interface, an RS232 interface and a USB (universal serial bus) interface, wherein the CAN controller, the CAN transceiver and the CAN interface are sequentially connected, the CAN controller is connected with the MCU, the double-purpose communication card also comprises a dial switch and a dual four-channel analog switch, the dial switch is connected with the MCU, the input end of the dual four-channel analog switch is connected with the MCU, and the output ends of the dual four-channel analog switch are respectively connected with the RS232 interface and the USB interface. The double-purpose communication card can choose the RS232 interface or the USB interface according to need.
Description
Technical field:
The utility model relates to the computer network facility field, specifically is a kind of dual-purpose communication card.
Background technology:
Existing communication card has only a kind of function usually, or connects the RS232 interface, or connects USB interface, and sometimes need use the RS232 interface in actual use, sometimes need use USB interface again, so just needs to be equipped with two kinds of communication cards.Therefore in use inconvenient.
The utility model content:
The utility model technical problem to be solved is, a kind of dual-purpose communication card is provided, and this dual-purpose communication card can be selected RS232 interface or USB interface as required.
The technical solution of the utility model is, a kind of dual-purpose communication card is provided, and comprises MCU, CAN controller, CAN transceiver, CAN interface, RS232 interface and USB interface; Wherein, CAN controller, CAN transceiver, CAN interface connect successively, and the CAN controller is connected with MCU; Also comprise toggle switch and two four path analoging switch; Toggle switch is connected with MCU, and the input of two four path analoging switch is connected with MCU, and output is connected with RS232 interface and USB interface respectively.
Adopt after the above structure compared with prior art, the utlity model has following advantage:.Through toggle switch block selecting position, MCU is provided with two four path analoging switch through the state that reads toggle switch then, still is the purpose of USB interface thereby reach selection RS232 interface.
As preferably, described MCU is a single-chip microcomputer.
As preferably, described toggle switch is two retaining toggle switchs.Confirm gear through this toggle switch.
Further, also connect high speed photo coupling between described CAN controller and the CAN transceiver, the CAN transceiver also connects the isolated from power chip.Through in CAN communication, increasing high speed photo coupling and isolated from power chip, purer power supply can be provided, other parts of minimizing system improve the reliability of CAN telecommunication circuit work to the interference of CAN communication.
Description of drawings:
Fig. 1 is the theory diagram of the utility model.
Fig. 2 is the circuit theory diagrams of analog switch CD4502.
Embodiment:
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
As shown in Figure 1, a kind of dual-purpose communication card comprises MCU (micro-control unit), CAN controller, CAN transceiver, CAN interface, RS232 interface and USB interface; Wherein, CAN controller, CAN transceiver, CAN interface connect successively, and the CAN controller is connected with MCU; Also comprise toggle switch and two four path analoging switch; Toggle switch is connected with MCU, and the input of two four path analoging switch is connected with MCU, and output is connected with RS232 interface and USB interface respectively.Described toggle switch in the present embodiment is two retaining toggle switchs; Two four path analoging switch are CD4052; MCU is single-chip microcomputer PIC16F74; Single-chip microcomputer comes A, the B address wire (A, B are connected to the I/O mouth of single-chip microcomputer PIC16F74) of the two four path analoging switch CD4052 of software setting through the state that reads two retaining toggle switchs, thereby reaches the purpose of selecting RS232 or USB.As shown in Figure 2, when A=0, B=0, O/IX=X0, O/IY=Y0, RX_MCU is connected with RX_232, and TX_MCU is connected with TX_232; When A=1, B=0, O/IX=X1, O/IY=Y1, RX_MCU is connected with RX_USB, and TX_MCU is connected with TX_USB.That is to say, when A=0, B=0, select the RS232 interface, when A=1, B=0, select USB interface.
For purer power supply is provided; Other parts of minimizing system improve the reliability of CAN telecommunication circuit work to the interference of CAN communication, also connect high speed photo coupling between described CAN controller and the CAN transceiver; The CAN transceiver also connects the isolated from power chip, in order to independent current source to be provided.The high speed photo coupling of present embodiment is 6N137.
Below only be described, but can not be interpreted as it is restriction claim with regard to the utility model preferred embodiment.Every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done includes within the scope of patent protection of the utility model.
Claims (4)
1. a dual-purpose communication card comprises MCU, CAN controller, CAN transceiver, CAN interface, RS232 interface and USB interface, wherein; CAN controller, CAN transceiver, CAN interface connect successively; The CAN controller is connected with MCU, it is characterized in that: also comprise toggle switch and two four path analoging switch, toggle switch is connected with MCU; The input of two four path analoging switch is connected with MCU, and output is connected with RS232 interface and USB interface respectively.
2. dual-purpose communication card according to claim 1 is characterized in that: described MCU is a single-chip microcomputer.
3. dual-purpose communication card according to claim 1 is characterized in that: described toggle switch is two retaining toggle switchs.
4. dual-purpose communication card according to claim 1 is characterized in that: also connect high speed photo coupling between described CAN controller and the CAN transceiver, the CAN transceiver also connects the isolated from power chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205468753U CN202385070U (en) | 2011-12-23 | 2011-12-23 | Double-purpose communication card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205468753U CN202385070U (en) | 2011-12-23 | 2011-12-23 | Double-purpose communication card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202385070U true CN202385070U (en) | 2012-08-15 |
Family
ID=46633540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205468753U Expired - Lifetime CN202385070U (en) | 2011-12-23 | 2011-12-23 | Double-purpose communication card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202385070U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3065114A1 (en) * | 2015-03-03 | 2016-09-07 | TROX GmbH | Smoke alarm system |
-
2011
- 2011-12-23 CN CN2011205468753U patent/CN202385070U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3065114A1 (en) * | 2015-03-03 | 2016-09-07 | TROX GmbH | Smoke alarm system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |