CN209962117U - Singlechip serial bus multichannel control circuit - Google Patents
Singlechip serial bus multichannel control circuit Download PDFInfo
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- CN209962117U CN209962117U CN201921156606.9U CN201921156606U CN209962117U CN 209962117 U CN209962117 U CN 209962117U CN 201921156606 U CN201921156606 U CN 201921156606U CN 209962117 U CN209962117 U CN 209962117U
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Abstract
The utility model relates to a singlechip serial bus multichannel control circuit, including serial bus control circuit, multichannel USB changes URAT bridging and serial output circuit, multichannel USB output circuit and USB change ethernet control and output circuit, singlechip serial bus is connected with serial bus control circuit's input electricity, serial bus control circuit's output changes URAT bridging and serial output circuit, multichannel USB output circuit and USB with multichannel USB respectively and changes ethernet control and output circuit electricity and be connected. The utility model discloses a serial bus control circuit converts the USB bus signal of singlechip output into multichannel USB output signal, converts singlechip serial bus signal into serial bus signal output downstream communication controlled circuit through serial bus control circuit, carries out data transmission and control, has realized converting singlechip serial bus into multichannel serial signal, has characteristics such as high efficiency, low power dissipation, data transmission accuracy, but wide application in intelligence electron and communication equipment actual circuit.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a singlechip serial bus multichannel control circuit.
Background
With the increasing abundance of functions of intelligent equipment, a single chip microcomputer in the electronic intelligent equipment needs a plurality of data transmission and control circuits, and the original parallel transmission mode of a single chip microcomputer bus cannot meet the requirement. If according to original transmission mode, the function expansion of the single chip microcomputer in the existing electronic intelligent equipment can be limited by the interface of the single chip microcomputer and cannot be realized.
Disclosure of Invention
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, a singlechip serial bus multichannel control circuit is provided.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a multi-path control circuit of a serial bus of a single chip microcomputer comprises a serial bus control circuit, a multi-path USB-to-URAT bridge and serial output circuit, a multi-path USB output circuit and a USB-to-Ethernet control and output circuit, wherein the serial bus of the single chip microcomputer is electrically connected with the input end of the serial bus control circuit, and the output end of the serial bus control circuit is respectively and electrically connected with the multi-path USB-to-URAT bridge and serial output circuit, the multi-path USB output circuit and the USB-to-Ethernet control and output circuit.
The utility model has the advantages that: the utility model discloses a singlechip serial bus multichannel control circuit, through serial bus control circuit convert the USB bus signal of singlechip output into multichannel USB output signal, by USB change URAT bridging and serial output circuit convert two way UART serial data communication signal with USB output signal all the way to a plurality of downstream communication controlled circuit and carry out data transmission and control, simultaneously, USB output circuit directly exports the USB data signal of singlechip output to downstream equipment, USB change ethernet control and output circuit convert the USB data signal of singlechip output into ethernet data signal and export VPN bus external network equipment, realized converting singlechip serial bus into multichannel serial data signal, have high efficiency, low power consumption, data transmission characteristics such as accurate, technical indicator reaches state's intelligent electron and communication equipment multichannel serial hub communication technical requirement, and can be widely applied to actual circuits of intelligent electronic and communication equipment.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the serial bus control circuit adopts a hub control chip with the model number of FE 2.1.
Further: the USB-to-URAT bridging and serial output circuit adopts a USB-to-double UART bridge control chip with the model number of CP 2105.
Further: the USB output circuit comprises a diode D1, a diode D2, a diode D3, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a thermistor PTC1, a triode Q1, a MOS transistor Q2 and a USB terminal J2, wherein one signal output end of the serial bus control circuit is electrically connected with a pin No. 3 of the USB terminal J2 through the resistor R14, the other signal output end of the serial bus control circuit is electrically connected with a pin No. 2 of the USB terminal J2 through the resistor R15, the pin No. 3 of the USB terminal J2 is electrically connected with the cathode of the diode D1, the anode of the diode D1 is electrically connected with the pin No. 2 of the USB terminal J2, the anode of the diode D2 and the anode of the diode D3 are respectively grounded, the cathode of the diode D2 and the cathode of the diode D3 are respectively electrically connected with the pin No. 2 and the pin No. 3 of the USB terminal J2, pin 4 of the USB terminal is grounded, pin 1 of the USB terminal J2 is connected to an external power supply, pin 1 of the USB terminal J2 is electrically connected to the drain of the MOS transistor Q2 through the thermistor PTC1, the source of the MOS transistor Q2 is electrically connected to the external power supply, the gate of the MOS transistor Q2 is connected to the collector of the transistor Q1, the collector of the transistor Q1 is electrically connected to the external power supply through the resistor R18, the emitter of the transistor Q1 is grounded, the resistor R17 and the resistor R16 are sequentially connected in series between the base of the transistor Q1 and the external power supply, and the common terminal of the resistor R17 and the resistor R16 is electrically connected to the output terminal of the single chip microcomputer.
The beneficial effects of the further scheme are as follows: the USB output circuit can directly output a plurality of paths of USB data signals output by the serial bus control circuit to downlink equipment through a USB terminal, the triode Q1 and the MOS tube Q2, the triode Q3 and the MOS tube Q4 respectively form a 2-path USB port power supply circuit, and whether the USB power supply works or not is controlled according to signals output by the single chip microcomputer.
Further: the USB-to-Ethernet control and output circuit comprises a USB-to-Ethernet control circuit and an Ethernet communication output circuit, the output end of the serial bus control circuit is electrically connected with the input end of the USB-to-Ethernet control circuit, the output end of the USB-to-Ethernet control circuit is electrically connected with the input end of the Ethernet communication output circuit, and the output end of the Ethernet communication output circuit is electrically connected with external network equipment.
The beneficial effects of the further scheme are as follows: the USB-to-Ethernet control and output circuit can convert the USB data signal output by the serial bus control circuit into an Ethernet data signal and output the Ethernet data signal to VPN external network equipment.
Further: the USB-to-Ethernet control circuit adopts an Ethernet controller chip with the model number of RTL8152B, and the Ethernet communication output circuit adopts an Ethernet isolation transformer.
Drawings
Fig. 1 is a block diagram of a multi-path control circuit of a serial bus of a single chip microcomputer according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a serial bus control circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a first USB to URAT bridge and serial output circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a second USB to URAT bridge and serial output circuit according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a third USB to URAT bridge and serial output circuit according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a fourth USB to URAT bridge and serial output circuit according to an embodiment of the present invention;
fig. 7 is a circuit diagram of a first USB output circuit according to an embodiment of the present invention;
fig. 8 is a circuit diagram of a second USB output circuit according to an embodiment of the present invention;
fig. 9 is a circuit diagram of a USB to ethernet control and output circuit according to an embodiment of the present invention.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a multi-channel control circuit for serial bus of a single chip microcomputer comprises a serial bus control circuit, a multi-channel USB-to-URAT bridge and serial output circuit, a multi-channel USB output circuit and a USB-to-ethernet control and output circuit, wherein the serial bus of the single chip microcomputer is electrically connected with the input end of the serial bus control circuit, and the output end of the serial bus control circuit is respectively electrically connected with the multi-channel USB-to-URAT bridge and serial output circuit, the multi-channel USB output circuit and the USB-to-ethernet control and output circuit.
The utility model discloses a singlechip serial bus multichannel control circuit, through serial bus control circuit convert the USB bus signal of singlechip output into multichannel USB output signal, by USB change URAT bridging and serial output circuit convert two way UART serial data communication signal with USB output signal all the way to a plurality of downstream communication controlled circuit and carry out data transmission and control, simultaneously, USB output circuit directly exports the USB data signal of singlechip output to downstream equipment, USB change ethernet control and output circuit convert the USB data signal of singlechip output into ethernet data signal and export VPN bus external network equipment, realized converting singlechip serial bus into multichannel serial signal, have high efficiency, low power consumption, data transmission characteristics such as accurate, technical indicator reaches state's intelligent electron and communication equipment multichannel serial hub communication technical requirement, and can be widely applied to actual circuits of intelligent electronic and communication equipment.
In one or more embodiments provided by the present invention, the serial bus control circuit adopts a hub control chip U1 with a model number FE 2.1. In practice, as shown in fig. 2, the hub control chip U1 is further provided with a peripheral circuit, wherein J1 is a serial communication interface of the single chip microcomputer. FE2.1 is a highly integrated, high quality, high performance, low power consumption, low overall cost, high speed seven port USB2.0 hub. Its function is to convert the USB bus signals DPU and DMU from the single chip computer into 7-channel USB output signals DP1, DM1, DP2, DM2, DP3, DM3, DP4, DM4, DP5, DM5, DP6, DM6, DP7 and DM 7. The USB output signals DP1 and DM1 are output to a first path of USB output single circuit, the USB output signals DP2 and DM2 are output to a second path of USB output single circuit, the USB output signals DP3 and DM3 are output to a USB-to-Ethernet control and output circuit, the USB output signals DP4 and DM4 are output to a first path of USB-to-URAT bridge and serial output circuit, the USB output signals DP5 and DM5 are output to a second path of USB-to-URAT bridge and serial output circuit, the USB output signals DP6 and DM6 are output to a third path of USB-to-URAT bridge and serial output circuit, and the DP7 and DM7 are output to a fourth path of USB-to-URAT bridge and serial output circuit.
In one or more embodiments provided by the utility model, USB changes URAT bridging and changes two UART bridge control chip with serial output circuit adoption model for the USB of CP2105, as shown in fig. 3 to 6, the circuit diagram that first way USB changes URAT bridging and serial output circuit, second way USB changes URAT bridging and serial output circuit, third way USB changes URAT bridging and serial output circuit and fourth way USB changes URAT bridging and serial output circuit is shown respectively in the figure, change two UART bridge control chip U2(U3, U4 or U5) and peripheral circuit including USB.
CP2105 is a highly integrated USB to dual UART bridge controller. The function of the universal serial bus control circuit is to convert 4 paths of USB signals DP4, DM4, DP5, DM5, DP6, DM6, DP7 and DM7 output by a serial bus control chip U1 into 8 paths of UART serial data communication signals TXD1, RXD1, TXD2, RXD2, TXD3, RXD3, TXD4, RXD4, TXD5, RXD5, TXD6, RXD6, TXD7, RXD7, TXD8 and RXD8 and then transmit the serial data signals to 8 controlled circuits.
As shown in fig. 7, in one or more embodiments of the present invention, the first path of the USB output circuit includes a diode D1, a diode D2, a diode D3, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a thermistor PTC1, a transistor Q1, a MOS transistor Q2, and a USB terminal J2, one path of the signal output terminal of the serial bus control circuit is electrically connected to the pin No. 3 of the USB terminal J2 through the resistor R14, the other path of the signal output terminal of the serial bus control circuit is electrically connected to the pin No. 2 of the USB terminal J2 through the resistor R15, the pin No. 3 of the USB terminal J2 is electrically connected to the cathode of the diode D1, the anode of the diode D1 is electrically connected to the pin No. 2 of the USB terminal J2, the anode of the diode D2 and the anode of the diode D3 are respectively grounded, the cathode of the diode D2 and the cathode of the diode D3 are electrically connected with the pin No. 2 and the pin No. 3 of the USB terminal J2 respectively, pin No. 4 of the USB terminal is grounded, pin No. 1 of the USB terminal J2 is connected with the output of an external power supply +5VS (the output of the external power supply + 5V), pin 1 of the USB terminal J2 is electrically connected to the drain of the MOS transistor Q2 through the thermistor PTC1, the source of the MOS transistor Q2 is grounded, the gate of the MOS transistor Q2 is connected with the collector of the transistor Q1, the collector of the transistor Q1 is electrically connected with the external power supply +5V through the resistor R18, the emitter of the triode Q1 is connected with the ground, the resistor R17 and the resistor R16 are connected in series between the base of the triode Q1 and the +3.3V external power supply in sequence, and the common end of the resistor R17 and the resistor R16 is electrically connected with the output end of the singlechip.
The USB output circuit can directly output a plurality of paths of USB data signals output by the serial bus control circuit to downlink equipment through a USB terminal, the triode Q1 and the MOS tube Q2, the triode Q3 and the MOS tube Q4 respectively form a 2-path USB port power supply circuit, and whether the USB power supply works or not is controlled according to signals output by the single chip microcomputer.
As shown in fig. 8, the specific structural circuit diagram of the second path of the USB output circuit is substantially the same as the specific structural circuit diagram of the first path of the USB output circuit, and is not described herein again.
The utility model discloses in, USB output circuit is two tunnel (has only been out of wherein in fig. 7 one way), and 2 way USB data signal DP1, DM1, DP2, DM2 with serial bus control chip U1 output directly export down equipment through USB terminal J2, J3. The triode Q1 and the MOSFET Q2, the triode Q3 and the MOSFET Q4 respectively form a 2-way USB port power supply circuit, and the USB power supply is controlled to work or not by the signals PC15 and PD6 output by the single chip microcomputer.
The utility model provides a in one or more embodiments, USB changes ethernet control and output circuit and includes that USB changes ethernet control circuit and ethernet communication output circuit, serial bus control circuit's output is connected with USB changes ethernet control circuit's input electricity, USB changes ethernet control circuit's output and ethernet communication output circuit's input electricity is connected, ethernet communication output circuit's output is connected with external network equipment electricity.
The USB-to-Ethernet control and output circuit can convert the USB data signal output by the serial bus control circuit into an Ethernet data signal and output the Ethernet data signal to VPN external network equipment.
Preferably, as shown in fig. 9, in one or more embodiments of the present invention, the USB to ethernet controller circuit is a USB to ethernet controller chip with model number RTL8152B, RTL8152B is an integrated 10/100M ethernet transceiver, and the ethernet communication output circuit is an ethernet isolation transformer T1 with model number AH1601C 1. The ethernet controller chip U6 and isolation transformer T1 and peripheral circuits are shown in fig. 5.
The USB data signals DP3 and DM3 output by the serial bus control chip U1 are converted into Ethernet data signals RXI P4, RX I M4, TXOP4 and TXOM4 by a USB-to-Ethernet control chip RTL8152B, and then output to the VPN external network equipment through a network isolation transformer T1.
The utility model discloses a singlechip serial bus multichannel control circuit has realized converting singlechip serial bus into multichannel serial transmission mode to control a plurality of downlink communication circuit and network equipment, and have characteristics such as high efficiency, low power dissipation, data transmission accuracy, technical indicator reaches the intelligent electron of national regulation and communication equipment multichannel serial bus concentrator communication technical requirement, and be applied to intelligent electron and communication equipment actual circuit.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. A multi-path control circuit of a serial bus of a single chip microcomputer is characterized by comprising a serial bus control circuit, a multi-path USB-to-URAT bridge and serial output circuit, a multi-path USB output circuit and a USB-to-Ethernet control and output circuit, wherein the serial bus of the single chip microcomputer is electrically connected with the input end of the serial bus control circuit, and the output end of the serial bus control circuit is respectively electrically connected with the multi-path USB-to-URAT bridge and serial output circuit, the multi-path USB output circuit and the USB-to-Ethernet control and output circuit.
2. The multi-path control circuit for the serial bus of the single chip microcomputer according to claim 1, wherein the serial bus control circuit adopts a hub control chip with a model number of FE 2.1.
3. The multi-path control circuit for the serial bus of the single chip microcomputer according to claim 1, wherein the USB-to-URAT bridge and the serial output circuit adopt a control chip of a USB-to-dual UART bridge with the model number of CP 2105.
4. The multi-path control circuit for the serial bus of the single chip microcomputer according to claim 1, wherein the USB output circuit comprises a diode D1, a diode D2, a diode D3, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a thermistor PTC1, a triode Q1, a MOS transistor Q2 and a USB terminal J2, one signal output end of the serial bus control circuit is electrically connected with the pin No. 3 of the USB terminal J2 through the resistor R14, the other signal output end of the serial bus control circuit is electrically connected with the pin No. 2 of the USB terminal J2 through the resistor R15, the pin No. 3 of the USB terminal J2 is electrically connected with the cathode of the diode D1, the anode of the diode D1 is electrically connected with the pin No. 2 of the USB terminal J2, the anode of the diode D2 and the anode of the diode D3 are respectively grounded, the negative electrode of the diode D2 and the negative electrode of the diode D3 are respectively and correspondingly electrically connected with pin No. 2 and pin No. 3 of the USB terminal J2, pin No. 4 of the USB terminal is grounded, pin No. 1 of the USB terminal J2 is connected with an external power supply, pin No. 1 of the USB terminal J2 is electrically connected with the drain electrode of the MOS tube Q2 through the thermistor PTC1, the source electrode of the MOS tube Q2 is electrically connected with the external power supply, the grid electrode of the MOS tube Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q1 is electrically connected with the external power supply through the resistor R18, the emitter electrode of the triode Q1 is grounded, the resistor R17 and the resistor R16 are sequentially connected in series between the base electrode of the triode Q1 and the external power supply, and the common end of the resistor R17 and the resistor R16 is electrically connected with the output end of the.
5. The single-chip microcomputer serial bus multi-path control circuit according to any one of claims 1 to 4, wherein the USB to Ethernet control and output circuit comprises a USB to Ethernet control circuit and an Ethernet communication output circuit, an output end of the serial bus control circuit is electrically connected with an input end of the USB to Ethernet control circuit, an output end of the USB to Ethernet control circuit is electrically connected with an input end of the Ethernet communication output circuit, and an output end of the Ethernet communication output circuit is electrically connected with an external network device.
6. The multi-path control circuit for the serial bus of the single chip microcomputer according to claim 5, wherein the USB-to-Ethernet control circuit is an Ethernet controller chip with a model number of RTL8152B, and the Ethernet communication output circuit is an Ethernet isolation transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921156606.9U CN209962117U (en) | 2019-07-22 | 2019-07-22 | Singlechip serial bus multichannel control circuit |
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| CN201921156606.9U CN209962117U (en) | 2019-07-22 | 2019-07-22 | Singlechip serial bus multichannel control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320844A (en) * | 2019-07-22 | 2019-10-11 | 武汉洲际电讯科技股份有限公司 | A kind of single-chip microcontroller universal serial bus multi-channel control circuit |
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2019
- 2019-07-22 CN CN201921156606.9U patent/CN209962117U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320844A (en) * | 2019-07-22 | 2019-10-11 | 武汉洲际电讯科技股份有限公司 | A kind of single-chip microcontroller universal serial bus multi-channel control circuit |
| CN110320844B (en) * | 2019-07-22 | 2024-05-10 | 武汉洲际电讯科技股份有限公司 | Multi-channel control circuit for serial bus of single chip microcomputer |
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