CN207504849U - Communication control circuit system - Google Patents
Communication control circuit system Download PDFInfo
- Publication number
- CN207504849U CN207504849U CN201721303773.2U CN201721303773U CN207504849U CN 207504849 U CN207504849 U CN 207504849U CN 201721303773 U CN201721303773 U CN 201721303773U CN 207504849 U CN207504849 U CN 207504849U
- Authority
- CN
- China
- Prior art keywords
- communication
- electrically connected
- communication bus
- resistor
- pull
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 title claims abstract description 157
- 239000004065 semiconductor Substances 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model discloses a kind of communication control circuit system, including the first communication device, the first protection circuit unit, level conversion control circuit unit, the second communication device, the second protection circuit unit, the first communication bus and the second communication bus；The receiving terminal of the first communication bus and the transmitting terminal of the second communication bus is electrically connected in first communication device both ends, and the transmitting terminal of the first communication bus and the receiving terminal of the second communication bus is electrically connected in the second communication device both ends.The utility model between the first communication bus and the second communication bus by setting level conversion control unit, it is using the conducting state of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor that the output terminal of the first communication device is consistent with the output terminal level state of the second communication device, so as to fulfill the first communication device and the normal communication of the second communication device.
Description
Technical field
The utility model is related to consumer electronics field, more particularly, to a kind of communication control circuit system.
Background technology
Existing certain order circuits could be communicated mutually on the basis of being generally built upon same level, if communication
The both ends level in circuit is different, and the circuit units at high level end are needed after increasing many decompressions, regulator circuit processing, return communication
The both ends level on road is equal, could be communicated so that circuit complexity and the cost is relatively high.
Utility model content
Based on this, it is necessary to for above-mentioned background technology there are the problem of, a kind of communication control circuit system is provided, is passed through
Metal-oxide-semiconductor control circuit realizes two-way level converting, is normally communicated so as to fulfill between order circuit both ends.
To achieve the above object, the utility model discloses a kind of communication control circuit system, including the first communication dress
It puts, first protects circuit unit, level conversion control circuit unit, the second communication device, the second protection circuit unit, first to lead to
Bus and the second communication bus are interrogated, the first protection circuit unit both ends are electrically connected in the reception of the first communication bus
End and the transmitting terminal of the first communication bus, the second protection circuit unit both ends are electrically connected in the second communication bus
The transmitting terminal of receiving terminal and the second communication bus；Connecing for the first communication bus is electrically connected in the first communication device both ends
The transmission of the first communication bus is electrically connected in the transmitting terminal of receiving end and the second communication bus, the second communication device both ends
End and the receiving terminal of the second communication bus；The level conversion control circuit unit includes the first pull-up resistor, the second pull-up electricity
Resistance, third pull-up resistor, the 4th pull-up resistor, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, the source electrode of first metal-oxide-semiconductor are electrically connected
The receiving terminal of first communication bus, the transmitting terminal of drain electrode the first communication bus of electric connection of first metal-oxide-semiconductor, described second
The source electrode of metal-oxide-semiconductor is electrically connected the transmitting terminal of the second communication bus, and the drain electrode of second metal-oxide-semiconductor is electrically connected the first communication always
The receiving terminal of line, described first pull-up resistor one end are electrically connected the transmitting terminal of the second communication bus, second pull-up resistor
One end is electrically connected the receiving terminal of the first communication bus, the first pull-up resistor other end, the second pull-up resistor other end, the
The first reference voltage has been electrically connected in the grid of the grid of one metal-oxide-semiconductor and the second metal-oxide-semiconductor；Described third pull-up resistor one end
The transmitting terminal of the first communication bus is electrically connected, described 4th pull-up resistor one end is electrically connected the reception of the second communication bus
End, the second reference voltage has been electrically connected in the third pull-up resistor other end and the 4th pull-up resistor other end.
The voltage value of second reference voltage is greater than or equal to the electricity of the first reference voltage in one of the embodiments,
Pressure value.
The first protection circuit unit and the second protection circuit unit are two pole of transient state in one of the embodiments,
Pipe.
Described first communication device one end connecing by first resistor and the first communication bus in one of the embodiments,
Receiving end is electrically connected, and first communication device is electrically connected by the transmitting terminal of second resistance and the first communication bus, described
Second communication device one end is electrically connected by the transmitting terminal of 3rd resistor and the first communication bus, and second communication device is another
One end is electrically connected by the receiving terminal of the 4th resistance and the second communication bus.
The voltage value selected as 3V of first reference voltage in one of the embodiments, the electricity of the second reference voltage
Pressure value selected as 5V.
In one of the embodiments, the voltage value of first reference voltage be 2.5V, 3.3V or 3.6V, described second
The voltage value of reference voltage matches for 5V, 9V or 12V.
In conclusion the utility model communication control circuit system by the first communication bus and the second communication bus it
Between level conversion control unit is set, using the conducting state of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor by the output of the first communication device
End is consistent with the output terminal level state of the second communication device, so as to fulfill the normal of the first communication device and the second communication device
Communication.
Description of the drawings
Fig. 1 is a kind of schematic block circuit diagram of embodiment of the utility model communication control circuit system；
Fig. 2 is the circuit diagram of the utility model communication control circuit system.
Specific embodiment
As depicted in figs. 1 and 2, the utility model communication control circuit system is protected including the first communication device 100, first
Circuit unit 200, level conversion control circuit unit 300, the second communication device 400, second protection circuit unit 500, first
600 and second communication bus 700 of communication bus, it is wink that the first protection circuit unit 200 and second, which protects circuit unit 500,
State diode effectively protects the precision components in the first communication device 100 and the second communication device 400, from various waves
Gush the damage of pulse；First protection circuit unit, 200 both ends are electrically connected in the receiving terminal of the first communication bus 600
And first communication bus 600 transmitting terminal, the second protection circuit unit 500 both ends are electrically connected total in the second communication
The transmitting terminal of the receiving terminal of line 700 and the second communication bus 700.
The receiving terminal RX1 and second that the first communication bus 600 is electrically connected in first communication device, 100 both ends is logical
The transmitting terminal TX2 of bus 700 is interrogated, the transmission of the first communication bus 600 is electrically connected in 400 both ends of the second communication device
The receiving terminal RX2 of TX1 and the second communication bus 700 is held, specifically, described first communication device, 100 one end passes through first resistor
The receiving terminal RX1 of R1 and the first communication bus 600 is electrically connected, and first communication device 100 passes through second resistance R2 and the
The transmitting terminal TX1 of one communication bus 600 is electrically connected, and described second communication device, 400 one end passes through 3rd resistor R3 and first
The transmitting terminal TX1 of communication bus 600 is electrically connected, and 400 other end of the second communication device passes through the 4th resistance R4 and second
The receiving terminal RX2 of communication bus 700 is electrically connected.
The level conversion control circuit unit 300 is including in the first pull-up resistor Rg1, the second pull-up resistor Rg2, third
Pull-up resistor Rg3, the 4th pull-up resistor Rg4, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2, the source electrode of the first metal-oxide-semiconductor Q1 are electrical
The drain electrode for connecting the receiving terminal RX1, the first metal-oxide-semiconductor Q1 of the first communication bus 600 is electrically connected the first communication bus 600
The source electrode of transmitting terminal TX1, the second metal-oxide-semiconductor Q2 are electrically connected the transmitting terminal TX2, the 2nd MOS of the second communication bus 700
The drain electrode of pipe Q2 is electrically connected the receiving terminal RX1 of the first communication bus 600, and described first pull-up resistor Rg1 one end is electrically connected
The transmitting terminal TX2 of second communication bus 700, described second pull-up resistor Rg2 one end is electrically connected connecing for the first communication bus 600
Receiving end RX1, the first pull-up resistor Rg1 other ends, the second pull-up resistor Rg2 other ends, the grid of the first metal-oxide-semiconductor Q1 and
The first reference voltage V CC1 has been electrically connected in the grid of two metal-oxide-semiconductor Q2；Described third pull-up resistor Rg3 one end is electrically connected
The transmitting terminal TX1 of first communication bus 600, described 4th pull-up resistor Rg4 one end is electrically connected connecing for the second communication bus 700
The second base has been electrically connected in receiving end RX2, the third pull-up resistor Rg3 other ends and the 4th pull-up resistor Rg4 other ends
Quasi- voltage VCC2, wherein the voltage value of the second reference voltage V CC2 necessarily is greater than or the voltage equal to the first reference voltage V CC1
Value.
The voltage value selected as 3V of the first reference voltage V CC1 in one of the embodiments, the second reference voltage
The voltage value selected as 5V of VCC2.
The voltage value of the first reference voltage V CC1 can be replaced 2.5V, 3.3V, 3.6V etc. in one of the embodiments,
The voltage value of second reference voltage V CC2, which can match, replaces with 5V, 9V, 12V etc..
The concrete operating principle of the utility model is as follows, and the output terminal of the first communication device 100 passes through the first pull-up resistor
Rg1 is pulled to 3V, at this point, the source voltage values of the grid of the first metal-oxide-semiconductor Q1 and the first metal-oxide-semiconductor Q1 are 3V, first metal-oxide-semiconductor
Voltage difference Vgs between the grid and source electrode of Q1 is less than the threshold voltage of the first metal-oxide-semiconductor Q1, and the first metal-oxide-semiconductor Q1 is not turned on；This
When, the output terminal of the second communication device 400 is pulled upward to 5V, the output terminal of the first communication device 100 by third pull-up resistor Rg3
And second the output terminal of communication device 400 be high level state, so as to fulfill the first communication device 100 and the second communication device
400 normal communication.
In one of the embodiments, when the output terminal of the first communication device 100 exports low level signal, the first MOS
The source electrode of pipe Q1 also becomes low level, and the grid voltage of the first metal-oxide-semiconductor Q1 remains at 3V, the grid of the first metal-oxide-semiconductor Q1 at this time
Voltage difference Vgs between pole and source electrode is higher than the threshold voltage of the first metal-oxide-semiconductor Q1, the first metal-oxide-semiconductor Q1 conductings, the second communication device
400 output terminal is then due to the conducting of the first metal-oxide-semiconductor Q1 and the source level state consistency of the first metal-oxide-semiconductor Q1, i.e., the second communication
The output terminal of device 400 pulls down to low level state from high level state, so as to fulfill the first communication device 100 and the second communication
The normal communication of device 400.
In one of the embodiments, when the output terminal of the second communication device 400 exports low level signal, the first MOS
The drain electrode of pipe Q1 also becomes low level, at this point, the drain voltage value of the first metal-oxide-semiconductor Q1 can be pulled down until the first metal-oxide-semiconductor Q1
Grid and source electrode between voltage difference Vgs be higher than the first metal-oxide-semiconductor Q1 threshold voltage, the first metal-oxide-semiconductor Q1 conducting, first communication
The output terminal of control unit is then consistent with the drain electrode level state of the first metal-oxide-semiconductor Q1 due to the conducting of the first metal-oxide-semiconductor Q1, i.e., and first
The output terminal of communication device 100 pulls down to low level state from high level state, so as to fulfill the first communication device 100 and second
The normal communication of communication device 400.
It is communicated always in the first communication bus 600 and second in conclusion the utility model communication control circuit system passes through
Level conversion control unit is set between line 700, and the conducting state using the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 is led to first
The output terminal for interrogating device 100 is consistent with the output terminal level state of the second communication device 400, so as to fulfill the first communication device
100 and second communication device 400 normal communication.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (6)
1. a kind of communication control circuit system, it is characterised in that：Including the first communication device, the first protection circuit unit, level
Conversion control circuit unit, the second communication device, the second protection circuit unit, the first communication bus and the second communication bus, institute
The first protection circuit unit both ends are stated to be electrically connected in the transmission of the receiving terminal and the first communication bus of the first communication bus
Receiving terminal and the second communication bus in the second communication bus is electrically connected in end, the second protection circuit unit both ends
Transmitting terminal；The receiving terminal of the first communication bus and the hair of the second communication bus is electrically connected in the first communication device both ends
The reception of the transmitting terminal and the second communication bus of the first communication bus is electrically connected in sending end, the second communication device both ends
End；The level conversion control circuit unit is including on the first pull-up resistor, the second pull-up resistor, third pull-up resistor, the 4th
Pull-up resistor, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, the source electrode of first metal-oxide-semiconductor are electrically connected the receiving terminal of the first communication bus,
The drain electrode of first metal-oxide-semiconductor is electrically connected the transmitting terminal of the first communication bus, and the source electrode of second metal-oxide-semiconductor is electrically connected the
The transmitting terminal of two communication buses, draining for second metal-oxide-semiconductor is electrically connected the receiving terminal of the first communication bus, on described first
Pull-up resistor one end is electrically connected the transmitting terminal of the second communication bus, and it is total that described second pull-up resistor one end is electrically connected the first communication
The receiving terminal of line, the first pull-up resistor other end, the second pull-up resistor other end, the first metal-oxide-semiconductor grid and the 2nd MOS
The first reference voltage has been electrically connected in the grid of pipe；Described third pull-up resistor one end is electrically connected the first communication bus
Transmitting terminal, described 4th pull-up resistor one end are electrically connected the receiving terminal of the second communication bus, and the third pull-up resistor is another
The second reference voltage has been electrically connected in end and the 4th pull-up resistor other end.
2. communication control circuit system according to claim 1, it is characterised in that：The voltage value of second reference voltage
Greater than or equal to the voltage value of the first reference voltage.
3. communication control circuit system according to claim 1 or 2, it is characterised in that：The first protection circuit unit
And second protection circuit unit be transient diode.
4. communication control circuit system according to claim 1 or 2, it is characterised in that：Described first communication device one end
It is electrically connected by the receiving terminal of first resistor and the first communication bus, first communication device passes through second resistance and first
The transmitting terminal of communication bus is electrically connected, the transmission that described second communication device one end passes through 3rd resistor and the first communication bus
End is electrically connected, and the second communication device other end is electrically connected by the receiving terminal of the 4th resistance and the second communication bus.
5. communication control circuit system according to claim 1 or 2, it is characterised in that：The electricity of first reference voltage
Pressure value selected as 3V, the voltage value selected as 5V of the second reference voltage.
6. communication control circuit system according to claim 1 or 2, it is characterised in that：The electricity of first reference voltage
Pressure value is 2.5V, 3.3V or 3.6V, and the voltage value of second reference voltage matches for 5V, 9V or 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721303773.2U CN207504849U (en) | 2017-10-11 | 2017-10-11 | Communication control circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721303773.2U CN207504849U (en) | 2017-10-11 | 2017-10-11 | Communication control circuit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207504849U true CN207504849U (en) | 2018-06-15 |
Family
ID=62499891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721303773.2U Expired - Fee Related CN207504849U (en) | 2017-10-11 | 2017-10-11 | Communication control circuit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207504849U (en) |
-
2017
- 2017-10-11 CN CN201721303773.2U patent/CN207504849U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104253459A (en) | USB device with power supply mode switching function | |
| CN104298575A (en) | Mainboard debugging circuit | |
| CN108808643A (en) | A kind of analog switching circuit | |
| CN103684407A (en) | Otg device | |
| CN208872847U (en) | A kind of dry and wet node acquisition circuit module | |
| CN208092121U (en) | A kind of voltage monitoring circuit based on reset chip | |
| CN207504849U (en) | Communication control circuit system | |
| CN105676986A (en) | Interface switching system for electronic equipment | |
| CN104777436A (en) | Novel alternating current power supply monitoring device | |
| CN106569572B (en) | Mainboard and computerized control system with the mainboard | |
| CN107767654A (en) | A kind of MBUS collectors | |
| CN207319225U (en) | A kind of iic bus circuit with isolation features | |
| CN203661030U (en) | Electrical level switching circuit and circuit board having same | |
| CN204832858U (en) | Galvanic isolation formula guard grating | |
| CN204440388U (en) | A kind of easy data transmission circuit | |
| CN207281529U (en) | A kind of enabled control circuit of RS485 communications | |
| CN204119204U (en) | A kind of bus logic level bi-directional conversion circuit | |
| CN102751976A (en) | Electric leakage prevention and electric level compatible circuit based on I2C (Intel-Integrated Circuit) bus | |
| CN204515160U (en) | Offshore shooting instrument towing cable DC constant current power supply is powered and is gone up electric system step by step | |
| CN104375966A (en) | Isolation control device and isolation control method for processor interface | |
| CN104461999A (en) | Circuit for automatically implementing functions of USB (universal serial bus) boot disks and OTG (on-the-go) function | |
| CN204539117U (en) | The reusable communication interface circuit of a kind of single line | |
| CN207637035U (en) | Regulator control circuit | |
| CN107958586A (en) | A kind of remote signalling adaptive circuit | |
| CN208537976U (en) | Air compressor monitoring device in weather radar station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |