CN2300946Y - Serial port expanded controller - Google Patents
Serial port expanded controller Download PDFInfo
- Publication number
- CN2300946Y CN2300946Y CN 97205742 CN97205742U CN2300946Y CN 2300946 Y CN2300946 Y CN 2300946Y CN 97205742 CN97205742 CN 97205742 CN 97205742 U CN97205742 U CN 97205742U CN 2300946 Y CN2300946 Y CN 2300946Y
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- circuit
- serial
- resistance
- control circuit
- multichannel
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Abstract
The utility model belongs to the technical field of an electronic control device, composed of a programmable series connection and parallel connection converting chip, a crystal oscillating circuit, an addresses frameshift and transforming circuit, a series multi-way output control circuit, a series multi-way input control circuit, a multi-way selecting control circuit, a series signal drive circuit, a series signal receiving circuit, and a receiving and sending indicating circuit, which are electrically connected. One host machine can carry out data processing with 6-12 subsidiary machines. The utility model can transmit data to the subsidiary machine at 1000 meters with 2400-9600 baud rate, and has the advantages of stable operation and reliable performance.
Description
The utility model relates to a kind of multichannel bidirectional control device, belongs to the electronic-controlled installation technical field.
Existing computing machine generally is provided with two serial ports in the lump, a spot of computing machine is provided with two and four serial ports, in the control of master-slave mode multimachine, it is very inconvenient to carry out exchanges data, after main frame connects slave, do not had other serial input equipment such as other serial line interfaces such as mouse, scanner etc. to connect, greatly reduced the function of main frame.
The purpose of this utility model is to overcome the deficiencies in the prior art, under the situation that does not influence the original interface of main frame, provides a kind of 6-12 of having serial port and external unit to carry out the serial port extending controller of exchanges data.
The purpose of this utility model is achieved through the following technical measures:
A kind of serial port extending controller is selected control circuit, serial signal driving circuit, serial signal receiving circuit, is received and send indicating circuit and form by string able to programme and conversion chip, crystal oscillating circuit, address frameshit and address translation circuit, serial multichannel output control circuit, serial multichannel input control circuit, multichannel; Crystal oscillating circuit, address frameshit select control circuit, reception transmission indicating circuit all to be connected with string able to programme and conversion chip with address translation circuit, serial multichannel output control circuit, serial multichannel input control circuit, multichannel, multichannel selects control circuit to be connected with address translation circuit, serial multichannel output control circuit and serial multichannel input control circuit with the address frameshit respectively, and the serial signal driving circuit is connected with serial multichannel input control circuit with serial multichannel output control circuit respectively with the serial signal receiving circuit; String able to programme and conversion chip UM8250B, crystal oscillating circuit is by the 1.8432MHz crystal oscillator, reverser 74LS04, resistance R 2, R3, capacitor C 1, C3, C4 forms, address frameshit and address translation circuit are by eight input nand gate 74LS30, two input four nor gate 74LS32, reverser 74LS04 and resistance R 4 are formed, serial multichannel input/output control circuit and multichannel select control circuit by eight d type flip flop 74LS273, three-eight code translator 74LS138, eight-three demoder 74LS151 form, serial signal driving circuit and serial signal receiving circuit are by line drive 74LS244, photoisolator TIL113 and resistance R 7-R22 form, and receive to send indicating circuit by 74LS244, pilot lamp and resistance R 5, R6 forms; R1 is string able to programme and conversion chip pull-up resistor.The foregoing circuit element is welded on the plate, and inserts the main frame expansion slot.
The also available 74LS14 chip of reverser 74LS04 in the crystal oscillating circuit replaces;
The also available 4N25 of photoisolator TIL113 in serial signal driving circuit and the serial signal receiving circuit, 4N35 chip replace;
Pilot lamp can be used the 5V light emitting diode;
During work, pass through mainframe program, the filter of serial emission baud is set, status word is set, select data channel, main frame begins to carry out exchanges data with a certain slave, and slave notice host data disposes, main frame carries out exchanges data with another slave again, can carry out data processing with 6-12 platform slave successively like this.
The utility model can be with the filter of the baud of 2400-9600 with data transmission to 1000 meter slave far away, and working stability, dependable performance.
Below be description of drawings:
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is a structured flowchart of the present utility model.
Wherein, 1. string able to programme and conversion chip, 2. multichannel is selected control circuit, 3. address frameshit and address translation circuit, 4. serial multichannel input control circuit, 5. serial multichannel output control circuit, 6. serial signal driving circuit, 7. the serial signal receiving circuit 8. receives and sends indicating circuit, 9. crystal oscillating circuit.
The utility model is described in further detail below in conjunction with drawings and Examples:
Embodiment: as shown in Figure 1, with string able to programme and conversion chip 1, crystal oscillating circuit 9, address frameshit and address translation circuit 3, serial multichannel output control circuit 5, serial multichannel input control circuit 4, multichannel is selected control circuit 2, serial signal driving circuit 6, serial signal receiving circuit 7, receiving transmission indicating circuit 8 is welded on the plate, string able to programme and conversion chip UM8250B, crystal oscillating circuit 1.8432MHz crystal oscillator, reverser 74LS04, address frameshit and address translation circuit are with eight input nand gate 74LS30, two input four nor gate 74LS32, reverser 74LS04, serial multichannel input/output control circuit and multichannel select control circuit with eight d type flip flop 74LS273, three-eight code translator 74LS138, eight-three demoder 74LS151, serial signal driving circuit and serial signal receiving circuit line drive 74LS244, photoisolator TIL113, receive and send indicating circuit 74LS244, pilot lamp 5V light emitting diode, resistance R 1 resistance is 10K Ω, the R2--R6 resistance is 1K Ω, resistance R 7-R18 resistance is 100 Ω, resistance R 19, the R22 resistance is 560K Ω, resistance R 20, the R21 resistance is 560 Ω, capacitor C 1, C3, the electric capacity of C4 is respectively 104Pf, 36Pf and 36Pf.
Claims (5)
1. one kind by string able to programme and conversion chip, crystal oscillating circuit, address frameshit and address translation circuit, serial multichannel output control circuit, serial multichannel input control circuit, multichannel is selected control circuit, the serial signal driving circuit, the serial signal receiving circuit, receive and send the serial port extending controller that indicating circuit is formed, it is characterized in that, crystal oscillating circuit, address frameshit and address translation circuit, serial multichannel output control circuit, serial multichannel input control circuit, multichannel is selected control circuit, receiving the transmission indicating circuit all is connected with string able to programme and conversion chip, multichannel select control circuit respectively with address frameshit and address translation circuit, serial multichannel output control circuit is connected with serial multichannel input control circuit, and the serial signal driving circuit is connected with serial multichannel input control circuit with serial multichannel output control circuit respectively with the serial signal receiving circuit; String able to programme and conversion chip UM8250B, crystal oscillating circuit is by the 1.8432MHz crystal oscillator, reverser 74LS04, resistance R 2, R3, capacitor C 1, C3, C4 forms, address frameshit and address translation circuit are by 8 input nand gate 74LS30, two input four nor gate 74LS32, reverser 74LS04 and resistance R 4 are formed, serial multichannel input/output control circuit and multichannel select control circuit by 8D trigger 74LS273, three-eight code translator 74LS138, eight-three demoder 74LS151 form, serial signal driving circuit and serial signal receiving circuit are by line drive 74LS244, photoisolator TIL113 and resistance R 7-R22 form, and receive to send indicating circuit by 74LS244, pilot lamp and resistance R 5, R6 forms.The foregoing circuit element is welded on the plate, and inserts the main frame expansion slot.
2. serial port extending controller according to claim 1 is characterized in that, the also available 74LS14 chip of the reverser 74LS04 in the crystal oscillating circuit replaces.
3. serial port extending controller according to claim 1 is characterized in that, also available 4N25 of the photoisolator TIL113 in serial signal driving circuit and the serial signal receiving circuit or 4N35 chip replace.
4. serial port extending controller according to claim 1, it is characterized in that, resistance R 2, R3 resistance are 4.7K Ω-10K Ω, resistance R 5, R6 resistance are 560 Ω-2K Ω, resistance R 7-R18 resistance is 50 Ω-200 Ω, resistance R 19, R22 resistance are 470K Ω-630K Ω, and resistance R 20, R21 resistance are 407 Ω-630 Ω, and the electric capacity of capacitor C 1, C3, C4 is respectively 104-474Pf, 10-100Pf and 10-100Pf.
5. serial port extending controller according to claim 1 is characterized in that pilot lamp can be selected the 5V light emitting diode for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97205742 CN2300946Y (en) | 1997-01-10 | 1997-01-10 | Serial port expanded controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97205742 CN2300946Y (en) | 1997-01-10 | 1997-01-10 | Serial port expanded controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2300946Y true CN2300946Y (en) | 1998-12-16 |
Family
ID=33925903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97205742 Expired - Fee Related CN2300946Y (en) | 1997-01-10 | 1997-01-10 | Serial port expanded controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2300946Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797978B (en) * | 2009-12-23 | 2014-04-16 | 中国航空工业集团公司第六三一研究所 | Brake integrated controller of unmanned plane |
| CN104572556A (en) * | 2014-12-31 | 2015-04-29 | 上海玮舟微电子科技有限公司 | Multistage serial port expansion circuit |
| CN105739384A (en) * | 2016-02-22 | 2016-07-06 | 武汉大学 | Distributed data acquisition device based on microprocessor |
| CN106773903A (en) * | 2016-11-22 | 2017-05-31 | 青岛大学 | A kind of signal circuit and terminal board |
-
1997
- 1997-01-10 CN CN 97205742 patent/CN2300946Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797978B (en) * | 2009-12-23 | 2014-04-16 | 中国航空工业集团公司第六三一研究所 | Brake integrated controller of unmanned plane |
| CN104572556A (en) * | 2014-12-31 | 2015-04-29 | 上海玮舟微电子科技有限公司 | Multistage serial port expansion circuit |
| CN104572556B (en) * | 2014-12-31 | 2018-07-06 | 上海玮舟微电子科技有限公司 | Multistage serial expanded circuit |
| CN105739384A (en) * | 2016-02-22 | 2016-07-06 | 武汉大学 | Distributed data acquisition device based on microprocessor |
| CN106773903A (en) * | 2016-11-22 | 2017-05-31 | 青岛大学 | A kind of signal circuit and terminal board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |