CN208970149U - A kind of display driver circuit of communication with the outside world - Google Patents
A kind of display driver circuit of communication with the outside world Download PDFInfo
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- CN208970149U CN208970149U CN201821548036.3U CN201821548036U CN208970149U CN 208970149 U CN208970149 U CN 208970149U CN 201821548036 U CN201821548036 U CN 201821548036U CN 208970149 U CN208970149 U CN 208970149U
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Abstract
The utility model relates to motor-drive technique fields, disclose a kind of display driver circuit of communication with the outside world, including DC power supply circuit, control centre's circuit, usb communication circuit and display data circuit；The DC voltage output end that DC power supply circuit has voltage different；Control centre's circuit includes the control chip with multiple input pins and multiple control pins；Usb communication circuit includes communication interface, communication power supply and communication chip；Show that data circuit includes display data chip, display selection chip and display device；The different DC voltage output end of voltage can satisfy the different chip of voltage in circuit, the input signal of control centre's circuit reception usb communication circuit, extraneous usb communication can be carried out using usb communication circuit, show data circuit can data in live display control chip, spend the time to go to the numerical value in the farther away host computer observation control chip of circuit without employee.
Description
Technical field
The utility model relates to motor-drive technique fields, more specifically, it relates to a kind of display of communication with the outside world
Driving circuit.
Background technique
Motor is widely used in various automatic extension control systems, as executive component if motor is in the process of work
Only to constant voltage is connected on the terminal of motor, then the running parameter of control motor can not be removed, and motor needs to control in practice
Revolving speed, torque and position processed etc., need to adjust voltage and current at any time.
If desired the running parameter for controlling motor, then need to generate control signal, this control signal be from controller (such as
MCU or DSP) in provide, cannot directly go to change voltage and current, so just needing plus motor-drive circuit, will control
Signal processed really converts the voltage and current signal for being applied to motor.
Existing motor-drive circuit will use the data transmission bus such as USB, CAN or RS-485 and external device is led to
Letter, but general motor-drive circuit connects host computer by data transmission bus, and motor driven electricity is shown on host computer
Communication data in road, host computer is in the farther away control room of motor drive ic, therefore by motor-drive circuit
Employee can not short distance the communication data observed in motor-drive circuit, thus can not be to the communication in motor-drive circuit
Data carry out field assay.
Utility model content
In view of the above technical problems, the utility model provides a kind of display driver circuit of communication with the outside world, with aobvious
Show the display device of data in driving circuit, it being capable of data in live display driver circuit.
To achieve the above object, the utility model provides following technical solution:
A kind of display driver circuit of communication with the outside world, including DC power supply circuit, control centre's circuit, usb communication electricity
Road and display data circuit；
The input terminal of DC power supply circuit is electrically connected with motor DC power supply, and DC power supply circuit has multiple groups voltage different
DC voltage output end, decompression chip is electrically connected on one of DC voltage output end, decompression chip has direct current core
Piece output end, all cathode in DC power supply circuit are electrically connected；
Control centre's circuit includes the control core with multiple power pins, multiple input pins and multiple control pins
Piece, power pins are electrically connected with direct current chip output, and input pin is electrically connected with usb communication circuit, control pin and driving
Execution circuit electrical connection；
Usb communication circuit includes communication interface, communication power supply and communication chip；
For communication interface tool there are four the communication interface of pin, the pin one of communication interface is communication power supply anode, pin two
For communication data negative, pin three is communication data positive, and pin four is communication power supply cathode；
Communication power supply includes tool there are four the power supply chip of pin, and the pin one of power supply chip is ground connection, pin two with draw
Foot four is electrically connected and to export, and pin three is input, and the understanding of the pin one of the pin three and communication interface of power supply chip is powered
The pin one of chip is electrically connected with the pin four of communication interface；
Communication chip is to turn UART chip using USB, and communication power supply is electrically connected with communication chip, for supplying for communication chip
Electricity, communication chip have USB port and the port UART, and USB port is electrically connected with communication interface, on the port UART and control chip
The pin of UART serial ports is electrically connected；
Show that data circuit includes display data chip, display selection chip and display device, display data chip with
Display selection chip all has input terminal and output end, and display device has data input pin and address input end, shows data
The input terminal of chip is electrically connected with the control pin on control chip with the input terminal of display selection chip, shows data chip
Output end be electrically connected with the data input pin of display device, display selection chip output end and display device address input
End electrical connection.
Through the above technical solutions, DC power supply circuit provides the working power for working normally circuit, multiple groups voltage is not
Same DC voltage output end can satisfy the different chip of operating voltage in circuit, and the input pin of control centre's circuit enough connects
The input signal for receiving usb communication circuit extraneous can carry out usb communication using usb communication circuit, and USB is that use scope is wide
All purpose communication mode shows number so that motor-drive circuit be allow to carry out data communication with the distinct device with USB circuit
According to circuit can data in live display control chip, spend the time to go to the farther away host computer observation control of circuit without employee
Numerical value in coremaking piece, timeliness are high.
Further, display data chip and display selection chip are the 74HC595PW chip with 16 pins,
Display device is six Digital sum pipes；
It shows that the pin 11 of data chip is electrically connected with the pin 11 of display selection chip, shows drawing for data chip
Foot 12 be electrically connected with display selection chip pin 12, show the pin one of data chip to pin seven and pin 15 and
Data-out pin on display device connects one to one, and display selects the pin one of chip to pin five and pin 15
It connects one to one with the address input pin on display device；
It shows that the pin 14 of data chip is electrically connected with a control pin of control chip, shows drawing for data chip
Foot nine is electrically connected with the grid of transistor M1, and the source electrode of transistor M1 is electrically connected direct current chip output cathode, and drain electrode passes through electricity
R1 electrical connection direct current chip output anode is hindered, drains and is electrically connected with the pin 14 of display selection chip.
Through the above technical solutions, 74HC595PW chip is a kind of chip sealed in and go out, work as in electronic display production
In be widely used, can reduce display data circuit occupy control chip on pin quantity, improve control chip on draws
The utilization rate of foot.
Further, by being provided with optical coupling isolation circuit between communication chip and control chip.
Further, optical coupling isolation circuit include isolation resistance and tool there are six pin isolating chip, isolating chip
Using TLP2362 chip, pin one be electrically connected by isolation resistance with the output of power supply chip, the pin three of isolating chip and
The pin electrical connection of the port UART on communication chip；
The pin four of isolating chip is electrically connected with the cathode of direct current chip output, the pin five and control core of isolating chip
One pin of on piece UART serial ports is electrically connected, and the pin six of isolating chip is electrically connected with the anode of direct current chip output.
Through the above technical solutions, optical coupling isolation circuit can make to control electrical isolation between chip and communication chip, thus
Protection control chip, while can also enhance the intensity of data-signal between control chip and communication chip, reduce external magnetic field pair
The interference effect of data-signal.
Further, pull-up resistor is electrically connected between the pin five and pin six of isolating chip.
Through the above technical solutions, pull-up resistor can stablize the stabilization journey of data-signal on the pin five of isolating chip
Degree.
Further, control centre's circuit is also electrically connected with control storage assembly, and the control storage assembly includes: and controls
The storage chip that coremaking piece is electrically connected by iic bus, storage chip have eight pins, pin one, pin two, pin three,
Pin four and pin seven are electrically connected with the cathode of direct current chip output, and a pin five and control pin is electrically connected, and are drawn
Foot six is electrically connected with another control pin, and pin eight is electrically connected with the anode of direct current chip output；
Pin five is electrically connected by resistance R30 with the anode of direct current chip output, and pin six passes through resistance R21 and direct current
The anode electrical connection of chip output.
Through the above technical solutions, control chip is communicated by iic bus with storage chip, thus in storage chip
Interior reading or storing data.
Further, multiple filter capacitors are electrically connected between the positive electrode and negative electrode of direct current chip output.
Through the above technical solutions, the voltage that filter plate capacitor can be improved direct current chip output stirs amplitude, moreover it is possible to filter
The spike burr on voltage waveform is removed, the quality of working power is improved.
Compared with prior art, the utility model has the beneficial effects that DC power supply circuit provides the work of multiple groups high quality
Make power supply, can satisfy the different chip of operating voltage in circuit, the data of external device are sent to control by usb communication circuit
Central circuit, control centre's circuit pass through serial communication for data by showing that data circuit is shown again, and display data are electric
Road can data in live display control chip, spend the time to go to the farther away host computer observation control core of circuit without employee
Numerical value in piece, timeliness are high.
Detailed description of the invention
Fig. 1 is the circuit block diagram of the utility model embodiment；
Fig. 2 is the utility model embodiment motor DC power supply and the circuit diagram for controlling storage assembly；
Fig. 3 is the utility model embodiment DC voltage output end and the circuit diagram for being depressured chip；
Fig. 4 is the circuit diagram that the utility model embodiment controls chip；
Fig. 5 is the circuit diagram of the utility model embodiment usb communication circuit；
Fig. 6 is the circuit diagram that the utility model embodiment shows data circuit；
Fig. 7 is the circuit diagram that the utility model embodiment drives input module and motor drive component.
Appended drawing reference: 100, DC power supply circuit；110, motor DC power supply；120, DC voltage output end；130, it drops
Press chip；200, control centre's circuit；210, chip is controlled；220, storage assembly is controlled；300, usb communication circuit；310, lead to
Believe interface；320, communication power supply；330, communication chip；340, optical coupling isolation circuit；400, execution circuit is driven；410, it drives defeated
Enter component；420, motor drive component；500, data circuit is shown；510, data chip is shown；520, display selection chip；
530, display device.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
Embodiment
A kind of display driver circuit of communication with the outside world, as shown in Figure 1, including DC power supply circuit 100, control centre's electricity
Road 200, usb communication circuit 300, display data circuit 500 and driving execution circuit 400.
As shown in Figure 2 and Figure 3, DC power supply circuit 100 is used and is opened by the direct current that UC3848B chip and peripheral circuit form
Powered-down source circuit is switching power circuit commonly used in the prior art using the switching power source chip that UC3848B chip forms.Directly
The input terminal of galvanic electricity source circuit 100 is electrically connected with AC rectification as rectification bridge chip GBJ1510 into motor made of direct current
DC power supply 110, the just extremely DC+ of direct-current switch power supply circuit, cathode 0V.DC power supply circuit 100 has multiple groups voltage
Different DC voltage output ends 120, switching power circuit output have multiple power supplies, and Some routes are 5V power supply, Some routes
For 8V power supply, Some routes are 15V power supply.Decompression chip 130, drop are wherein electrically connected on the DC voltage output end 120 of 8V
Press chip 130 using tool there are three the 1117M3-5.0 chip of pin, one pin and 8V power electric connection, a pin with
0V electrical connection, another pin are the voltage of 5.0V.Wherein decompression chip is electrically connected on the DC voltage output end 120 of 5V
130, decompression chip 130 using tool there are three the 1117M3-3.3 chip of pin, one pin and 5V power electric connection, one
Pin is electrically connected with 0V, another pin is the direct current chip output of 3.3V, and all cathode in DC power supply circuit 100 are equal
Electrical connection；Multiple filter capacitors are electrically connected between the positive electrode and negative electrode of direct current chip output.Filter plate capacitor can be improved directly
The voltage of stream chip output stirs amplitude, moreover it is possible to filter off the spike burr on voltage waveform, improve the quality of working power.
As shown in figure 4, control centre's circuit 200 includes with multiple power pins, multiple input pins and multiple controls
The control chip 210 of pin.MCU or DSP can be used in control chip 210, uses model in the present embodiment
The DSP and peripheral circuit of TMS320F28034PNT have a UART serial ports as control chip 210, and UART serial ports gathers around that there are two draw
Foot.Power pins are electrically connected with the direct current chip output of 3.3V, and input pin is electrically connected with usb communication circuit 300, for connecing
The signal that usb communication circuit 300 sends over is received, control pin is electrically connected with driving execution circuit 400, for executing to driving
Circuit 400 sends control signal and rotates by motor.
As shown in Fig. 2, controlling also being electrically connected with by iic bus for chip 210 in control centre's circuit 200 controls storage
Component 220, control storage assembly 220 include: the storage chip being electrically connected with control chip 210 by iic bus, storage chip
Using the 24C02 with eight pins.24C02 is serial E2PROM, is the memory device based on I2C-BUS, it then follows two-wire system
Agreement, small in size since it is convenient with interface, the features such as data power down is not lost, in instrument and meter and industrial automation control
It is got a lot of applications in system.Pin one, pin two, pin three, pin four and the pin seven of storage chip with direct current core
The cathode of piece output end is electrically connected, and a pin five and control pin is electrically connected, and pin six is electrically connected with another control pin,
Pin eight is electrically connected with the anode of direct current chip output.The anode electricity that pin five passes through resistance R30 and direct current chip output
Connection, pin six are electrically connected by resistance R21 with the anode of direct current chip output.Control chip 210 passes through iic bus and deposits
Storage chip is communicated, thus reading or storing data in storage chip.Resistance R21 and resistance R30 is the upper of iic bus
Pull-up resistor, they can make the data on iic bus more stable.
As shown in figure 5, usb communication circuit 300 includes communication interface 310, communication power supply 320 and communication chip 330.
The tool of communication interface 310 is communication power supply 320 there are four the communication interface 310 of pin, the pin one of communication interface 310
Anode, pin two are communication data negative, and pin three is communication data positive, and pin four is 320 cathode of communication power supply；
Communication power supply 320 includes tool there are four the power supply chip of pin, and 1117M3-3.3 chip can be used in power supply chip, supplies
The pin one of electrical chip is ground connection, and pin two is electrically connected with pin four and to export, and pin three is input, the pin of power supply chip
Three are electrically connected with the understanding of the pin one of communication interface 310, the pin one of power supply chip with the pin four of communication interface 310.
The power supply of the exportable 3.3V of 1117M3-3.3 chip.
Communication chip 330 is to turn UART chip using USB, such as the chip of model SIL2104.Communication power supply 320 and logical
Believe that chip 330 is electrically connected, for powering for communication chip 330, communication chip 330 has USB port and the port UART, the end USB
Mouth is electrically connected with communication interface 310, and the port UART is electrically connected with the pin of UART serial ports on control chip 210.The port UART or
Person's UART serial ports all has a transmitting pin and a reception pin.
Chip SIL2104 has 25 pins, pin two and pin 25 and 320 negative electricity of communication power supply
Connection, pin three is just being electrically connected with communication data, and pin four is electrically connected with communication data negative, pin five, pin six and
Pin seven is electrically connected with 3.3V positive pole, and pin eight is electrically connected with 320 anode of communication power supply, and pin nine passes through resistance R75
It is electrically connected with 3.3V positive pole, pin 15 is electrically connected by resistance R71 and Light-emitting diode LED 1 and 3.3V positive pole
It connects, the cathode of Light-emitting diode LED 1 is electrically connected with 3.3V positive pole, and the anode of Light-emitting diode LED 1 is electrically connected with resistance R71
It connects.The pin 16 of chip SIL2104 is electrically connected by capacitor C37 with 320 cathode of communication power supply, pin 20 and control chip
The transmitting pin electrical connection of the port UART on 210, pin 21 and the reception pin of the port UART on control chip 210 are electrically connected
It connects.Other pins of chip SIL2104 are vacantly not connected to.
By being provided with optical coupling isolation circuit 340 between communication chip 330 and control chip 210, control on chip 210
It connects on each pin of the port UART an optical coupling isolation circuit 340.Optical coupling isolation circuit 340 include isolation resistance and
There are six the isolating chips of pin for tool.Isolating chip uses TLP2362 chip, and pin one passes through isolation resistance and power supply chip
Output electrical connection, the pin three of isolating chip is electrically connected with the transmitting pin of the port UART or UART serial ports；
The pin four of isolating chip is electrically connected with the cathode of direct current chip output, five port UART of pin of isolating chip
Or the reception pin electrical connection of UART serial ports, the pin six of isolating chip are electrically connected with the anode of direct current chip output.Every
It is electrically connected with pull-up resistor between the pin five and pin six of off-chip piece, pull-up resistor can be stablized on the pin five of isolating chip
The degree of stability of data-signal.
Optical coupling isolation circuit 340 can make to control electrical isolation between chip 210 and communication chip 330, to protect control
Chip 210, while can also enhance the intensity of data-signal between control chip 210 and communication chip 330, reduce external magnetic field pair
The interference effect of data-signal.
As shown in fig. 6, display data circuit 500 includes display data chip 510, display selection chip 520 and display
Device 530, display data chip 510 and display selection chip 520 all have input terminal and output end, and display device 530 has
Data input pin and address input end, show data chip 510 input terminal and display selection chip 520 input terminal with control
Control pin electrical connection on coremaking piece 210, shows the output end of data chip 510 and the data input pin of display device 530
The output end of electrical connection, display selection chip 520 is electrically connected with the address input end of display device 530.
Show that data chip 510 and display selection chip 520 are the 74HC595PW chip with 16 pins,
74HC595PW chip is a kind of chip sealed in and go out, is widely used, can reduce aobvious in electronic display production
Show that data circuit 500 occupies the quantity of pin on control chip 210, improves the utilization rate of pin on control chip 210.Display
Part 530 is six Digital sum pipes, with data-out pin: pin A, pin B, pin C, pin D, pin E, pin F, pin
G, pin DP and address input pin: pin W1, pin W2, pin W3.
It shows that the pin 11 of data chip 510 is electrically connected with the pin 11 of display selection chip 520, shows data core
The pin 12 of piece 510 be electrically connected with display selection 520 pin 12 of chip, and the pin one of display data chip 510 is to pin
Seven and pin 15 connected one to one with the data-out pin on display device 530 by resistance, display selection chip
520 pin one connects one to one to pin five and pin 15 with the address input pin on display device 530.
It shows that the pin 14 of data chip 510 is electrically connected with a control pin of control chip 210, shows data core
The pin nine of piece 510 is electrically connected with the grid of transistor M1, and the source electrode of transistor M1 is electrically connected direct current chip output cathode, leakage
Pole is electrically connected direct current chip output anode by resistance R1, drains and is electrically connected with the pin 14 of display selection chip 520.It is brilliant
Body pipe M1 uses 2N7002.
As shown in fig. 7, driving execution circuit 400 includes the driving input module 410 being sequentially connected electrically and motor driven
Component 420, driving input module 410 are electrically connected with multiple control pins of control centre circuit 200, motor drive component 420
It is electrically connected with motor.Driving input module 410 includes that resistance R120, resistance R127 and capacitor C88, a control pin pass through
The resistance R120 being sequentially connected in series is electrically connected the cathode of DC voltage output end 120 with resistance R127, and capacitor C88 is connected in parallel on resistance
The both ends of R127；
Motor drive component 420 uses PS21765 chip and its peripheral circuit, and PS21765 is that a kind of structure is very tight
The intelligent power module gathered, using transfer mould encapsulation technology, convenient for producing in enormous quantities.PS21765 be internally integrated IGBT silicon wafer,
Gate driving and protection circuit.PS21765 is highly suitable for the frequency control of 100 ~ 200V grades of small-capacity motors of exchange.
PS21765 chip has multiple control signal pin and multiple control output pins, and each control signal pins are electrically connected
There is a driving input module 410, resistance R120 is electrically connected with the tie point of resistance R127 with control signal pins, control output
Pin is electrically connected with the pin on motor.
Using driving input module 410 and with integrated motor drive component 420, can reduce the component in circuit
Quantity achievees the purpose that reduce circuit board volume.
The course of work of the display driver circuit of communication with the outside world are as follows: DC power supply circuit 100 provides multiple groups high quality
Working power, such as the working power of 3.3V, 5V, 8V, 15V, it is different that these working powers can satisfy operating voltage in circuit
Chip.The data of external device are sent to control centre's circuit 200 by usb communication circuit 300, and control centre's circuit 200 passes through
The signal that pin sends control motor to driving execution circuit 400 is controlled, integrated driving input module 410 and motor are used
Driving assembly 420 can reduce the quantity of component and the volume of circuit board on circuit board as driving execution circuit 400.It is aobvious
Show data circuit 500 can data in live display driver circuit, spend the time to go to circuit without employee farther away upper
Numerical value in machine observation control chip 210, timeliness are high.It can reduce display data circuit 500 using 74HC595PW chip to account for
With the quantity of pin on control chip 210, the utilization rate of pin on control chip 210 is improved.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (7)
1. a kind of display driver circuit of communication with the outside world, which is characterized in that including DC power supply circuit (100), control centre
Circuit (200), usb communication circuit (300) and display data circuit (500)；
The input terminal of DC power supply circuit (100) is electrically connected with motor DC power supply (110), and DC power supply circuit (100) has
The different DC voltage output end of multiple groups voltage (120) is electrically connected with decompression core on one of DC voltage output end (120)
Piece (130), decompression chip (130) have direct current chip output, and all cathode in DC power supply circuit (100) are electrically connected
It connects；
Control centre's circuit (200) includes the control core with multiple power pins, multiple input pins and multiple control pins
Piece (210), power pins are electrically connected with direct current chip output, and input pin is electrically connected with usb communication circuit (300), control
Pin is electrically connected with driving execution circuit (400)；
Usb communication circuit (300) includes communication interface (310), communication power supply (320) and communication chip (330)；
Communication interface (310) tool is communication power supply there are four the communication interface (310) of pin, the pin one of communication interface (310)
(320) positive, pin two is communication data negative, and pin three is communication data positive, and pin four is negative for communication power supply (320)
Pole；
Communication power supply (320) includes tool there are four the power supply chip of pin, and the pin one of power supply chip is ground connection, pin two with draw
Foot four is electrically connected and to export, and pin three is input, the reason of the pin one of the pin three and communication interface (310) of power supply chip
Solution, the pin one of power supply chip are electrically connected with the pin four of communication interface (310)；
Communication chip (330) is to turn UART chip using USB, and communication power supply (320) is electrically connected with communication chip (330), is used for
For communication chip (330) power supply, communication chip (330) has USB port and a port UART, USB port and communication interface (310)
Electrical connection, the port UART are electrically connected with the pin of UART serial ports in control chip (210)；
Show that data circuit (500) include display data chip (510), display selection chip (520) and display device
(530), display data chip (510) and display selection chip (520) all have input terminal and output end, display device (530)
With data input pin and address input end, the input terminal of data chip (510) and the input of display selection chip (520) are shown
End is electrically connected with the control pin in control chip (210), shows the output end and display device of data chip (510)
(530) data input pin electrical connection, the output end of display selection chip (520) and the address input end of display device (530)
Electrical connection.
2. the display driver circuit of communication with the outside world according to claim 1, which is characterized in that display data chip
It (510) is the 74HC595PW chip with 16 pins with display selection chip (520), display device (530) is six
Charactron；
It shows that the pin 11 of data chip (510) is electrically connected with the pin 11 of display selection chip (520), shows data core
The pin 12 of piece (510) is electrically connected with display selection chip (520) pin 12, shows the pin one of data chip (510)
It connects one to one to pin seven and pin 15 with the data-out pin on display device (530), display selection chip
(520) pin one connects one to one to pin five and pin 15 with the address input pin on display device (530)；
It shows that the pin 14 of data chip (510) is electrically connected with a control pin of control chip (210), shows data core
The pin nine of piece (510) is electrically connected with the grid of transistor M1, and the source electrode of transistor M1 is electrically connected direct current chip output cathode,
Drain electrode is electrically connected direct current chip output anode by resistance R1, drains and is electrically connected with the pin 14 of display selection chip (520)
It connects.
3. the display driver circuit of communication with the outside world according to claim 1, which is characterized in that communication chip (330) with
It controls between chip (210) by being provided with optical coupling isolation circuit (340).
4. the display driver circuit of communication with the outside world according to claim 3, which is characterized in that optical coupling isolation circuit
It (340) include isolation resistance and tool there are six the isolating chip of pin, isolating chip uses TLP2362 chip, pin one
It is electrically connected by isolation resistance with the output of power supply chip, the port UART on the pin three of isolating chip and communication chip (330)
A pin electrical connection；
The pin four of isolating chip is electrically connected with the cathode of direct current chip output, the pin five and control chip of isolating chip
(210) pin electrical connection of UART serial ports, the pin six of isolating chip are electrically connected with the anode of direct current chip output on.
5. the display driver circuit of communication with the outside world according to claim 4, which is characterized in that the pin five of isolating chip
Pull-up resistor is electrically connected between pin six.
6. the display driver circuit of communication with the outside world according to claim 1, which is characterized in that control centre's circuit
(200) it is also electrically connected with control storage assembly (220), the control storage assembly (220) includes: logical with control chip (210)
Cross iic bus electrical connection storage chip, storage chip have eight pins, pin one, pin two, pin three, pin four with
And pin seven is electrically connected with the cathode of direct current chip output, pin five and one control pin be electrically connected, pin six with separately
One control pin electrical connection, pin eight are electrically connected with the anode of direct current chip output；
Pin five is electrically connected by resistance R30 with the anode of direct current chip output, and pin six passes through resistance R21 and direct current chip
The anode electrical connection of output end.
7. the display driver circuit of communication with the outside world according to claim 1, which is characterized in that direct current chip output
Multiple filter capacitors are electrically connected between positive electrode and negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548036.3U CN208970149U (en) | 2018-09-21 | 2018-09-21 | A kind of display driver circuit of communication with the outside world |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548036.3U CN208970149U (en) | 2018-09-21 | 2018-09-21 | A kind of display driver circuit of communication with the outside world |
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| Publication Number | Publication Date |
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| CN208970149U true CN208970149U (en) | 2019-06-11 |
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| CN201821548036.3U Active CN208970149U (en) | 2018-09-21 | 2018-09-21 | A kind of display driver circuit of communication with the outside world |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544462A (en) * | 2019-10-16 | 2019-12-06 | 广东科瑞德电气科技有限公司 | Double-loop display output circuit of intelligent instrument |
-
2018
- 2018-09-21 CN CN201821548036.3U patent/CN208970149U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544462A (en) * | 2019-10-16 | 2019-12-06 | 广东科瑞德电气科技有限公司 | Double-loop display output circuit of intelligent instrument |
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