CN210428810U - Remote controller chip circuit with key reset circuit and remote controller - Google Patents
Remote controller chip circuit with key reset circuit and remote controller Download PDFInfo
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- CN210428810U CN210428810U CN201921435074.2U CN201921435074U CN210428810U CN 210428810 U CN210428810 U CN 210428810U CN 201921435074 U CN201921435074 U CN 201921435074U CN 210428810 U CN210428810 U CN 210428810U
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Abstract
A remote controller chip circuit with a key reset circuit comprises a central control unit, an infrared drive unit, a key reset unit, a watchdog unit, a crystal oscillator and a power supply unit, wherein the crystal oscillator is connected with the central control unit, an infrared drive unit for receiving the infrared remote control signal of central control unit output is connected with the central control unit, be provided with the infrared output interface that is used for connecting infrared LED on the infrared drive unit, key drive unit connects on the central control unit, be provided with the key input interface that is used for carrying out key input with the keyboard connection on the key drive unit, key reset unit connects on the central control unit, be provided with the key input interface that resets that is used for connecting the button that resets on the key reset unit, watchdog unit connects on the central control unit, the last power input interface that is used for being connected with external power supply that is equipped with of electrical unit.
Description
Technical Field
The utility model discloses a remote controller chip circuit, especially a remote controller chip circuit and remote controller with button reset circuit.
Background
The remote controller is a wireless transmitting device, and codes the key information by modern digital coding technology, transmits light waves by an infrared diode, the light waves convert received infrared signals into electric signals by an infrared receiver of a receiver, the electric signals are decoded by a processor, and corresponding instructions are demodulated to achieve the operation requirements for controlling equipment such as a set top box, a television and the like. The inside singlechip that all is a built-in procedure that has of conventional remote controller, external connection has infrared ray LED, external device such as button, for convenient to use, remote controller manufacturer, the realization is with the program write-in singlechip of presetting, thereby form a specific remote controller chip, with convenient use more, however, among the prior art, remote controller inner space is limited, the structure that can not do is very complicated, on the other hand, the remote controller is with low costs, the selling price is low, cause its function to be simple relatively, in case the remote controller is absorbed in the endless loop, tear down the battery usually, go on power on reset to the remote controller, influence customer experience and the evaluation of product.
Disclosure of Invention
To the shortcoming that the remote controller among the above-mentioned prior art only goes up electrical reset function, the utility model provides a remote controller chip circuit and remote controller with button reset circuit, it embeds at the remote controller chip has button reset unit and watchdog unit, and the simple external button of accessible carries out the button and resets, and need not dismantle battery operation.
The utility model provides a technical scheme that its technical problem adopted is: a remote controller chip circuit with a key reset circuit comprises a central control unit, an infrared drive unit, a key reset unit, a watchdog unit, a crystal oscillator and a power supply unit, wherein the crystal oscillator is connected with the central control unit, an infrared drive unit for receiving the infrared remote control signal of central control unit output is connected with the central control unit, be provided with the infrared output interface that is used for connecting infrared LED on the infrared drive unit, key drive unit connects on the central control unit, be provided with the key input interface that is used for carrying out key input with the keyboard connection on the key drive unit, key reset unit connects on the central control unit, be provided with the key input interface that resets that is used for connecting the button that resets on the key reset unit, watchdog unit connects on the central control unit, the last power input interface that is used for being connected with external power supply that is equipped with of electrical unit.
The utility model provides a remote controller, remote controller include foretell remote controller chip circuit that has button reset circuit, battery, button, infrared LED and reset button, the battery is connected on the power input interface of remote controller chip, the button is connected on the button input interface of remote controller chip, infrared LED connects on infrared output interface, reset button connects on the button input interface that resets of remote controller chip, the button that resets can adopt the keyboard button.
The utility model provides a technical scheme that its technical problem adopted further still includes:
the key driving unit adopts a 4-8 mesh key layout mode and is provided with 4 driving input lines and 8 driving output lines, and the 4 driving input lines are respectively connected with a positive power supply through pull-up resistors.
The infrared driving unit comprises a triode Q1, a current-limiting resistor R5 and a current-limiting resistor R6, the base electrode of the triode Q1 is connected with a data pin of the MCU through the current-limiting resistor R5, the emitting electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 serves as an infrared output interface of the infrared driving unit connected with the infrared LED, and the current-limiting resistor R6 is connected between the collector electrode of the triode Q1 and the infrared output interface in series.
The key reset unit comprises a reset key interface and a resistor R11, the reset key interface and the resistor R11 are connected between a positive power supply and the ground in series, a capacitor C5 is connected with the reset key interface in parallel, and a resistor R12 is connected with the resistor R11 in parallel.
The VCC port of the watchdog unit is connected with a positive power supply, the GND port interface of the watchdog unit, the MR port and the WDO port of the watchdog unit are in short circuit, the RST end of the watchdog unit is connected with the RST port of the central control unit, the WDI port of the watchdog unit is connected with the I/O port of the central control unit, the PFO port of the watchdog unit is connected with the external interrupt interface of the central control unit, the PFI port of the watchdog unit is connected with the voltage dividing resistor network, the voltage dividing resistor network comprises a resistor R13 and a resistor R14 which are connected between the positive power supply and the ground in series, and the PFI port of the watchdog unit is connected with the common end of the resistor R13 and the resistor R14.
The power supply unit adopts a filter capacitor C5, and the filter capacitor C5 is connected between the positive power supply and the ground.
The display driving unit is connected to the central control unit and comprises a triode Q2, a current-limiting resistor R7 and a current-limiting resistor R8, the base electrode of the triode Q2 is connected with a data pin of the MCU through the current-limiting resistor R7, the emitter electrode of the triode Q2 is grounded, the collector electrode of the triode Q2 serves as an LED output interface of the display driving unit, and the current-limiting resistor R8 is connected between the collector electrode of the triode Q2 and the LED output interface in series.
The central control unit is connected with a buzzer driving unit, the buzzer driving unit comprises a triode Q3, a current-limiting resistor R9 and a current-limiting resistor R10, the base electrode of the triode Q3 is connected with a data pin of the MCU through the current-limiting resistor R9, the emitting electrode of the triode Q3 is grounded, the collector electrode of the triode Q3 is used as the buzzer output interface of the buzzer driving unit, and the current-limiting resistor R10 is connected between the collector electrode of the triode Q3 and the buzzer output interface in series.
The liquid crystal interface of the remote controller chip is connected with a liquid crystal screen, the LED output interface of the remote controller chip is connected with an LED for indication, and the buzzer output interface of the remote controller chip is connected with a buzzer.
The utility model has the advantages that: the utility model discloses it has button reset unit and watchdog unit to embed at remote controller chip, can guarantee that the remote controller can not be absorbed in the crash state under general state, is absorbed in the crash state promptly and also can carry out the button through simple external button and reset, and need not dismantle the battery operation.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Drawings
Fig. 1 is a block diagram of the circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The embodiment is a preferred embodiment of the present invention, and other principles and basic structures are the same as or similar to those of the embodiment, and are within the protection scope of the present invention.
Please refer to fig. 1 and fig. 2 in combination, the present invention is a remote controller chip circuit with a key reset circuit, which is an equivalent circuit inside a remote controller chip, and the circuit mainly includes a central control unit, an infrared driving unit, a key reset unit, a watchdog unit, a crystal oscillator and a power supply unit, wherein the crystal oscillator is connected to the central control unit, the infrared driving unit is connected to the central control unit for receiving an infrared remote control signal output by the central control unit, the infrared driving unit is provided with an infrared output interface for connecting an infrared LED, the key driving unit is connected to the central control unit, the key driving unit is provided with a key input interface for connecting to a keyboard for performing key input and inputting key information to the central control unit, the key reset unit is connected to the central control unit, be provided with the button input interface that resets on the button reset unit for connect the button that resets, carry out the information input that resets through the button that resets, watchdog unit connection is equipped with power input interface on the electrical unit on the central control unit, is used for being connected with external power supply, and external power supply passes through electrical unit and gives the utility model discloses the power supply.
In this embodiment, the central control unit is an MCU, and in this embodiment, a well-known 51-series MCU is taken as an example for description, and during specific implementation, an MCU with another structure may be used as the central control unit according to actual needs. The key drive unit adopts 4 the netted key layout mode of 8, 4 drive input lines promptly, 8 drive output lines, is connected with positive power supply through pull-up resistance on 4 drive input lines respectively, through the utility model discloses direct drive keyboard, drive output line are 4 the 8 network structure with the drive input line and distribute, and every node sets up a button.
In this embodiment, the infrared driving unit includes a transistor Q1, a current limiting resistor R5, and a current limiting resistor R6, a base of the transistor Q1 is connected to a data pin of the MCU through the current limiting resistor R5, an emitter of the transistor Q1 is grounded, a collector of the transistor Q1 is used as an infrared output interface of the infrared driving unit, and is connected to the infrared LED, and the current limiting resistor R6 is connected in series between the collector of the transistor Q1 and the infrared output interface.
In this embodiment, the key reset unit includes a reset key interface and a resistor R11, the reset key interface and the resistor R11 are connected in series between the positive power supply and the ground, the capacitor C5 is connected in parallel with the reset key interface, the resistor R12 is connected in parallel with the resistor R11, and the capacitor C5 and the resistor R12 form a power-on reset unit to perform power-on reset. In this embodiment, the watchdog unit is equivalent to a watchdog chip with a model MAX813L, and in a specific implementation, the watchdog unit may also be equivalent to other models of watchdog chips, a VCC port of the watchdog chip is connected to the positive power supply, a GND port of the watchdog chip is connected to a GND port, an MR port and a WDO port of the watchdog chip are shorted, a RST end of the watchdog chip is connected to a RST port of the central control unit, a WDI port of the watchdog chip is connected to an I/O port of the central control unit, in this embodiment, a WDI port of the watchdog chip is connected to a P2.4 port of the central control unit, a PFO port of the watchdog chip is connected to an external interrupt interface of the central control unit, in this embodiment, a PFO port of the watchdog chip is connected to an INT0 port of the central control unit, a PFI port of the watchdog chip is connected to a divider resistor network, and the divider resistor network includes a resistor R13 and a resistor R14 connected in series between the positive power supply and ground, the PFI port of the watchdog chip is connected to the common terminal of resistor R13 and resistor R14.
In this embodiment, the power supply unit employs a filter capacitor C5, and the filter capacitor C5 is connected between the positive power supply and the ground to filter spikes and the like of the input power supply.
In this embodiment, the central control unit is connected with a liquid crystal driving module, the liquid crystal driving module is equivalent to a liquid crystal driving chip with a 12864S model, and during specific implementation, the liquid crystal driving module can also be equivalent to liquid crystal driving chips with other models, and the liquid crystal driving module is provided with a liquid crystal interface for being connected with an external liquid crystal screen.
In this embodiment, the central control unit is connected to a display driving unit, the display driving unit includes a transistor Q2, a current limiting resistor R7, and a current limiting resistor R8, a base of the transistor Q2 is connected to a data pin of the MCU through the current limiting resistor R7, an emitter of the transistor Q2 is grounded, a collector of the transistor Q2 is used as an LED output interface of the display driving unit and is connected to the indication LED, and a collector of the transistor Q2 is connected to the LED output interface in series through the current limiting resistor R8.
In this embodiment, the central control unit is connected with a buzzer driving unit, the buzzer driving unit includes a triode Q3, a current limiting resistor R9 and a current limiting resistor R10, the base of the triode Q3 is connected with a data pin of the MCU through the current limiting resistor R9, the emitter of the triode Q3 is grounded, the collector of the triode Q3 is used as the buzzer output interface of the buzzer driving unit, and is used for being connected with an external buzzer, and the current limiting resistor R10 is connected in series between the collector of the triode Q3 and the buzzer output interface.
The utility model discloses protect a remote controller simultaneously, remote controller have the remote controller chip, battery, button, infrared LED and the button that resets of button function that resets including the aforesaid, the battery is connected on the power input interface of remote controller chip, and the keying is connected on the key input interface of remote controller chip, and infrared LED connects on infrared output interface, and the button connection that resets is on the key input interface that resets of remote controller chip, and the button that resets can adopt the keyboard button.
In this embodiment, a liquid crystal screen is connected to a liquid crystal interface of the remote controller chip, an LED output interface of the remote controller chip is connected to an LED for indication, and a buzzer is connected to a buzzer output interface of the remote controller chip.
The utility model discloses it has button reset unit and watchdog unit to embed at remote controller chip, can guarantee that the remote controller can not be absorbed in the crash state under general state, is absorbed in the crash state promptly and also can carry out the button through simple external button and reset, and need not dismantle the battery operation.
Claims (10)
1. The utility model provides a remote controller chip circuit with button reset circuit which characterized by: the remote controller chip circuit comprises a central control unit, an infrared drive unit, a key reset unit, a watchdog unit, a crystal oscillator and a power supply unit, wherein the crystal oscillator is connected with the central control unit, an infrared drive unit for receiving the infrared remote control signal of central control unit output is connected with the central control unit, be provided with the infrared output interface that is used for connecting infrared LED on the infrared drive unit, key drive unit connects on the central control unit, be provided with the key input interface that is used for carrying out key input with the keyboard connection on the key drive unit, key reset unit connects on the central control unit, be provided with the key input interface that resets that is used for connecting the button that resets on the key reset unit, watchdog unit connects on the central control unit, the last power input interface that is used for being connected with external power supply that is equipped with of electrical unit.
2. The remote control chip circuit with the key reset circuit as claimed in claim 1, wherein: the key driving unit adopts a 4-8 mesh key layout mode and is provided with 4 driving input lines and 8 driving output lines, and the 4 driving input lines are respectively connected with a positive power supply through pull-up resistors.
3. The remote control chip circuit with the key reset circuit as claimed in claim 1, wherein: the infrared driving unit comprises a triode Q1, a current-limiting resistor R5 and a current-limiting resistor R6, the base electrode of the triode Q1 is connected with a data pin of the MCU through the current-limiting resistor R5, the emitting electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 serves as an infrared output interface of the infrared driving unit connected with the infrared LED, and the current-limiting resistor R6 is connected between the collector electrode of the triode Q1 and the infrared output interface in series.
4. The remote control chip circuit with the key reset circuit as claimed in claim 1, wherein: the key reset unit comprises a reset key interface and a resistor R11, the reset key interface and the resistor R11 are connected between a positive power supply and the ground in series, a capacitor C5 is connected with the reset key interface in parallel, and a resistor R12 is connected with the resistor R11 in parallel.
5. The remote control chip circuit with the key reset circuit as claimed in claim 1, wherein: the VCC port of the watchdog unit is connected with a positive power supply, the GND port interface of the watchdog unit, the MR port and the WDO port of the watchdog unit are in short circuit, the RST end of the watchdog unit is connected with the RST port of the central control unit, the WDI port of the watchdog unit is connected with the I/O port of the central control unit, the PFO port of the watchdog unit is connected with the external interrupt interface of the central control unit, the PFI port of the watchdog unit is connected with the voltage dividing resistor network, the voltage dividing resistor network comprises a resistor R13 and a resistor R14 which are connected between the positive power supply and the ground in series, and the PFI port of the watchdog unit is connected with the common end of the resistor R13 and the resistor R14.
6. The remote control chip circuit with the key reset circuit as claimed in claim 1, wherein: the power supply unit adopts a filter capacitor C5, and the filter capacitor C5 is connected between the positive power supply and the ground.
7. The remote control chip circuit with the key reset circuit as claimed in claim 1, wherein: the display driving unit is connected to the central control unit and comprises a triode Q2, a current-limiting resistor R7 and a current-limiting resistor R8, the base electrode of the triode Q2 is connected with a data pin of the MCU through the current-limiting resistor R7, the emitter electrode of the triode Q2 is grounded, the collector electrode of the triode Q2 serves as an LED output interface of the display driving unit, and the current-limiting resistor R8 is connected between the collector electrode of the triode Q2 and the LED output interface in series.
8. The remote control chip circuit with the key reset circuit as claimed in claim 1, wherein: the central control unit is connected with a buzzer driving unit, the buzzer driving unit comprises a triode Q3, a current-limiting resistor R9 and a current-limiting resistor R10, the base electrode of the triode Q3 is connected with a data pin of the MCU through the current-limiting resistor R9, the emitting electrode of the triode Q3 is grounded, the collector electrode of the triode Q3 is used as the buzzer output interface of the buzzer driving unit, and the current-limiting resistor R10 is connected between the collector electrode of the triode Q3 and the buzzer output interface in series.
9. A remote controller is characterized in that: the remote controller comprises a remote controller chip circuit with a key reset circuit as claimed in any one of claims 1 to 8, a battery, a key, an infrared LED and a reset key, wherein the battery is connected to a power input interface of the remote controller chip, the key is connected to a key input interface of the remote controller chip, the infrared LED is connected to an infrared output interface, the reset key is connected to a reset key input interface of the remote controller chip, and the reset key can be a keyboard key.
10. The remote control of claim 9, wherein: the liquid crystal interface of the remote controller chip is connected with a liquid crystal screen, the LED output interface of the remote controller chip is connected with an LED for indication, and the buzzer output interface of the remote controller chip is connected with a buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921435074.2U CN210428810U (en) | 2019-08-31 | 2019-08-31 | Remote controller chip circuit with key reset circuit and remote controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921435074.2U CN210428810U (en) | 2019-08-31 | 2019-08-31 | Remote controller chip circuit with key reset circuit and remote controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210428810U true CN210428810U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921435074.2U Active CN210428810U (en) | 2019-08-31 | 2019-08-31 | Remote controller chip circuit with key reset circuit and remote controller |
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| Country | Link |
|---|---|
| CN (1) | CN210428810U (en) |
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2019
- 2019-08-31 CN CN201921435074.2U patent/CN210428810U/en active Active
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