CN201319187Y - Multi-serial port automatic switching communication device - Google Patents
Multi-serial port automatic switching communication device Download PDFInfo
- Publication number
- CN201319187Y CN201319187Y CNU2008201806142U CN200820180614U CN201319187Y CN 201319187 Y CN201319187 Y CN 201319187Y CN U2008201806142 U CNU2008201806142 U CN U2008201806142U CN 200820180614 U CN200820180614 U CN 200820180614U CN 201319187 Y CN201319187 Y CN 201319187Y
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- communication device
- serial
- circuit
- serial port
- automatic switching
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Abstract
The utility model discloses a multi-serial port automatic switching communication device. A microprocessing unit is arranged on a single board and connected to a logic unit circuit through the bit output interface circuit thereof, and the logic unit circuit is connected with intelligent equipment through a controlled unit circuit. The multi-serial port automatic switching communication device has the advantages that the frequent plugging and drawing of a large quantity of serial devices can be eliminated, the automatic access and identification and communication of the serial devices can be realized, the structure is simple, and the cost is low.
Description
Technical field
The utility model relates to a kind of automatic switchover communication device, and especially a kind of is to combine with various smart machines, be provided to realize between many serial ports switching, and many serial ports of communication automatic switchover communication device.
Background technology
At present, a large amount of authentication devices all uses the key devices based on serial ports, such as USB flash drive.When needs extended serial port, generally realize by HUB, but but HUB Extended Capabilities Port number is limited on the market, and each port can be discerned by main frame, and main frame can not be selected the specific port of identification as required.For example, by USB HUB cascade system, expansion computing machine USB port, then in theory, expand to 127 ports at most only, main frame can identify all available ports, and in actual applications, needs the serial port of main frame to expansion, automatically select, and be linked into intelligence system, discerned by system, and Extended Capabilities Port quantity can surpass 127.
The utility model content
(1) technical matters that will solve
Technical problem to be solved in the utility model provides a kind of many serial ports automatic switchover communication device at the existing in prior technology defective, overcome existing equipment and can't support extensive serial device to insert, and can't guarantee the problem of the contradiction of unique incoming communication equipment.
(2) technical scheme
The technical scheme that its technical matters that solves the utility model adopts is: a microprocessing unit is provided on veneer, utilize the position output interface circuit of this microprocessing unit, behind Signal Booster spare, be connected to logic unit circuit, logic unit circuit provides the coding gate logic of a multidigit, its input is provided by the position output of microprocessor, and its output result will remove gating No. one relay as the control gating signal.One controlled end of relay is the two single data transmission signal lines of a certain serial device (for example USB flash memory disk), the controlled end of another of a plurality of relays adopts parallel-connection structure to be attached to a pair of serial input/output signal line jointly, this to signal wire with as and (for example USB) signal of smart machine (such as computing machine) data service serial line interface insert smart machine.
Meanwhile, have only the signal of unique serial device to be access in smart machine in order to control, the utility model provides a control port, smart machine (such as computing machine) can be read and write this control port so that the control to the utility model equipment to be provided with software, and selects the signal of the serial device (for example USB flash memory disk) of appointment to insert smart machine (such as computing machine).
(3) a kind of many serial ports automatic switchover communication device of the present utility model compared with prior art has following beneficial effect:
A kind of many serial ports automatic switchover of the utility model communication device, it is efficiently a kind of and accessories apparatus cheaply, this device is the extended serial port on a large scale, and can be according to the needs of upper level system, particular port is linked in the upper level system, and system discerns by upper level, thereby realizes the communication between upper level system and the serial device.Remove the frequent plug of a large amount of serial devices from, realize that the automatic selection of serial device inserts and identification, the row communication of going forward side by side, and simple in structure, with low cost.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Figure is the circuit block diagram of a kind of many serial ports automatic switchover of the utility model communication device.
Embodiment
Shown in figure, a kind of many serial ports automatic switchover communication device, a microprocessing unit is set on veneer, and this microprocessing unit is connected to logic unit circuit by the position output interface circuit of self, and described logic unit circuit connects smart machine by the controlled cell circuit.
Described controlled cell circuit is a relay; Described relay one controlled end is two single data transmission signal lines of a certain serial device, and the controlled end of another of a plurality of relays adopts parallel-connection structure to be attached to a pair of serial input/output signal line jointly.
The RXD TXD signal of microprocessing unit links to each other the path of communication between forming device and the host computer with the corresponding pin of serial ports socket.4 control signal wires of microprocessing unit controller output behind Signal Booster spare, are input to shift register, and shift register output control signal is controlled relay then.Relay and USB D+ the D-signal wire link to each other, by microprocessing unit control and bus D+ break-make between the D-signal wire.
Above-described only is preferred implementation of the present utility model.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these also should be considered as belonging to protection domain of the present utility model.
Claims (2)
1, a kind of many serial ports automatic switchover communication device, it is characterized in that: a microprocessing unit is set on veneer, this microprocessing unit is connected to logic unit circuit by the position output interface circuit of self, and described logic unit circuit connects smart machine by the controlled cell circuit.
2, a kind of many serial ports automatic switchover communication device according to claim 1, it is characterized in that: described controlled cell circuit is a relay; Described relay one controlled end is two single data transmission signal lines of a certain serial device, and the controlled end of another of a plurality of relays adopts parallel-connection structure to be attached to a pair of serial input/output signal line jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201806142U CN201319187Y (en) | 2008-12-04 | 2008-12-04 | Multi-serial port automatic switching communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201806142U CN201319187Y (en) | 2008-12-04 | 2008-12-04 | Multi-serial port automatic switching communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201319187Y true CN201319187Y (en) | 2009-09-30 |
Family
ID=41197949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201806142U Expired - Fee Related CN201319187Y (en) | 2008-12-04 | 2008-12-04 | Multi-serial port automatic switching communication device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201319187Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114063506A (en) * | 2021-11-12 | 2022-02-18 | 罗森伯格技术有限公司 | Device for switching communication modes |
-
2008
- 2008-12-04 CN CNU2008201806142U patent/CN201319187Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114063506A (en) * | 2021-11-12 | 2022-02-18 | 罗森伯格技术有限公司 | Device for switching communication modes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20101204 |