CN208351371U - Extremely low power dissipation real time clock circuit - Google Patents
Extremely low power dissipation real time clock circuit Download PDFInfo
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- CN208351371U CN208351371U CN201820750742.XU CN201820750742U CN208351371U CN 208351371 U CN208351371 U CN 208351371U CN 201820750742 U CN201820750742 U CN 201820750742U CN 208351371 U CN208351371 U CN 208351371U
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Abstract
The utility model discloses a kind of extremely low power dissipation real time clock circuits, including counting circuit, logic control circuit, interface control circuit, data storage circuitry, the first power supply and second source；Counting circuit, logic control circuit and interface control circuit are connect with data storage circuitry respectively, and logic control circuit is connect with interface control circuit；First power supply is connect with logic control circuit, and is powered for logic control circuit；Second source is connect with counting circuit, interface control circuit and data storage circuitry respectively, and respectively counting circuit, interface control circuit and data storage circuitry power supply.The utility model divides different function circuit, and realize real time clock circuit using different electrical power and driving clock, to reduce power consumption when real time clock circuit work to greatest extent by being reconstructed at many levels to existing real time clock circuit.
Description
Technical field
The utility model relates to electronic circuit technology field more particularly to a kind of extremely low power dissipation real time clock circuits.
Background technique
Now in most of MCU (Microcontroller Unit, micro-control unit) chip, it is often necessary to use
RTC (Real Time Clock, real-time clock) realizes timing requirements for meeting under certain working conditions, and real-time
The lower power consumption required for during clock timing the better, is applied in battery powered equipment, can greatly reduce system power dissipation.
In the prior art, real time clock circuit is completely in the same power supply power supply domain, and is adopted in circuit design
The same clock is used as circuit and triggers clock to guarantee that circuit works normally.But in practical applications, real time clock circuit
In each functional module be not all require uninterrupted power supply, therefore, if all functional modules are in the same electricity
In the supply domain of source, then the waste of electricity easy to form provides the power consumption of system significantly.
Utility model content
Technical problem to be solved by the utility model is to provide a kind of extremely low power dissipation real time clock circuits, can be to existing
Some real time clock circuits carry out multi-level reconstruct to divide different function circuit, and realize real-time clock using different electrical power
Circuit, to reduce power consumption when real time clock circuit work to greatest extent.
In order to solve the above-mentioned technical problem, the utility model provides a kind of extremely low power dissipation real time clock circuit, including meter
Number circuit, logic control circuit, interface control circuit, data storage circuitry, the first power supply and second source；The counting electricity
Road, logic control circuit and interface control circuit are connect with data storage circuitry respectively, the logic control circuit and interface control
Circuit connection processed；First power supply is connect with logic control circuit, and is powered for logic control circuit；The second source point
It is not connect with counting circuit, interface control circuit and data storage circuitry, and respectively counting circuit, interface control circuit and number
It powers according to storage circuit.
As an improvement of the above scheme, the counting circuit is connect with external crystal oscillator, and is shaken using external crystal
Device is swung as work clock.
As an improvement of the above scheme, the external crystal oscillator is 32768Hz crystal oscillator.
As an improvement of the above scheme, the counting circuit includes multiple concatenated triggers.
As an improvement of the above scheme, the counting circuit includes 15 concatenated triggers.
As an improvement of the above scheme, first power supply be can power down power supply.
As an improvement of the above scheme, the second source is battery powered.
Implement the utility model, has the following beneficial effects:
The utility model by reconstructing existing real time clock circuit at many levels, by existing real time clock circuit
It is fine to divide different function circuit (counting circuit, logic control circuit, interface control circuit and data storage circuitry), and pass through
Different function circuit (counting circuit, logic control circuit, interface control circuit and data storage circuitry) is using different electrical power (the
One power supply and second source) and drive clock (external crystal oscillator, workclk) real-time come the extremely low power dissipation for realizing low cost
Clock circuit, to reduce power consumption when real time clock circuit work to greatest extent.
Specifically, logic control circuit is placed in the first power supply and carries out independently-powered processing by the utility model, and the
One power supply be can power down power supply, i.e. the first power supply can be with power down, to meet the low-power consumption mould of chip system in chip system
Formula requirement, further decreases chip power-consumption；Meanwhile counting circuit, interface control circuit and data are stored electricity by the utility model
Road is placed in second source, and second source is battery powered, to guarantee counting circuit, interface control circuit and data storage
Circuit has been constantly in electricity condition, and data storage circuitry can also save some chip power-downs after be not intended to the letter lost
Breath.It is extremely low to realize that the utility model extremely low power dissipation real time clock circuit can achieve in the case where cooperating chip system power-down mode
Power consumption, to substantially reduce the chip system overall power with real-time clock function.
Detailed description of the invention
Fig. 1 is the utility model extremely low power dissipation real time clock circuit structural schematic diagram.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type is described in further detail.Only this state, the utility model occur in the text or will occur upper and lower, left and right, it is preceding,
Afterwards, the orientation such as inside and outside word is not the specific restriction to the utility model only on the basis of the attached drawing of the utility model.
The specific structure of the utility model extremely low power dissipation real time clock circuit is shown referring to Fig. 1, Fig. 1 comprising is counted
Circuit 1, logic control circuit 2, interface control circuit 3, data storage circuitry 4, the first power supply 5 and second source 6.The counting
Circuit 1, logic control circuit 2 and interface control circuit 3 are connect with data storage circuitry 4 respectively, the logic control circuit 2 with
Interface control circuit 3 connects；First power supply 5 is connect with logic control circuit 2, and is powered for logic control circuit 2；It is described
Second source 6 is connect with counting circuit 1, interface control circuit 3 and data storage circuitry 4 respectively, and respectively counting circuit 1,
Interface control circuit 3 and data storage circuitry 4 are powered.
It should be noted that during extremely low power dissipation real time clock circuit carries out Counts, only pole in counting circuit 1
Few circuit is working, and interface control circuit 3 and data storage circuitry 4 no dynamic when chip system is without information exchange
Power consumption consumption, logic control circuit 2 can be with power down.Unlike reality technology, the utility model is electric by logic control
Road 2, which is placed in the first power supply 5, carries out independently-powered processing, and the first power supply 5 be can power down power supply, i.e., the first power supply 5 is in core
, to meet the low-power consumption mode requirement of chip system, chip power-consumption can be further decreased in piece system with power down；Meanwhile this
Counting circuit 1, interface control circuit 3 and data storage circuitry 4 are placed in second source 6 by utility model, and second source 6
It is battery powered, to guarantee that counting circuit 1, interface control circuit 3 and data storage circuitry 4 have been constantly in electricity condition, and
Data storage circuitry 4 is not intended to the information lost after can also saving some chip power-downs.To realize that the utility model is extremely low
Power consumption real time clock circuit can achieve extremely low power dissipation in the case where cooperating chip system power-down mode, so that substantially reducing has in real time
The chip system overall power of time clock feature.Specifically:
Counting circuit 1 is the core of entire extremely low power dissipation real time clock circuit, for acquiring the counting of external equipment
Count information is simultaneously sent to data storage circuitry by information；It should be noted that counting circuit 1 is mainly connected by multiple triggers
Composition, is preferably composed in series by 15 triggers.The counting circuit 1 is connect with external crystal oscillator, and using external brilliant
Oscillation body device has as work clock, while in each work clock and only 1 flip-flop operation.The crystal oscillator is excellent
It is selected as 32768Hz crystal oscillator.
Logic control circuit 2 works under workclk work clock, is extremely low power dissipation real time clock circuit and external circuit
Interface communication circuitry.Logic control circuit 2 is converted for receiving the temporal information of chip system transmission, then by temporal information
For format required for extremely low power dissipation real time clock circuit, and the temporal information after conversion is sent to interface control circuit 3；Also
For temporal information and count information to be sent to chip system.It should be noted that passing through logic control in chip system
Circuit 2 can realize the write-in and reading to extremely low power dissipation real time clock circuit relevant configuration information, and logic control circuit 2 is simultaneously
The convert signal for generating and being interacted between interface control circuit 3, and can directly receive from subdata storage circuit 4
Time&data information.Preferably, the logic control circuit 2 can be clock division circuits, this circuit is mature circuit,
It does not elaborate herein.
The interface control circuit 3 is stored for temporal information to be sent to data storage circuitry 4, the interface control
Circuit 3 processed is preferably selector, system that but not limited to this；It should be noted that interface control circuit 3 drives without work clock
It is dynamic, main function be the information for bringing logic control circuit 2 be converted into the configuration information that data storage circuitry 4 needs and
Write action signal config&wr.
The data storage circuitry 4 is used for storage time information, is also used to transmission time information to counting circuit 1 and carries out more
Newly, count information is stored, temporal information and count information are forwarded to logic control circuit 2.The data storage circuitry 4 is preferably
For register, system that but not limited to this.It should be noted that data storage circuitry 4 also drives without work clock, it is mainly
For the storage of Time Correlation Data and non-power down information data, 3 Information Number of interface from interface control circuit can receive
According to config&wr, and the achievable reading for updating time&load and count information to temporal information between counting circuit 1
Take counter.
In use, after temporal information being allocated to logic control circuit 2 by chip system, logic control circuit
Temporal information is converted into timing required for interface control circuit 3 by 2, and is converted into needed for extremely low power dissipation real time clock circuit
The information wanted.Data storage circuitry 4 writes direct the configuration information that interface control circuit 3 is sent in data storage circuitry 4
It in data storage register and saves, if desired renewal time then carries out load operation renewal time letter to counting circuit 1
Breath, and more new count value.Logic control circuit 2 directly can send time and data information to chip system.
From the foregoing, it will be observed that the utility model is by reconstructing existing real time clock circuit at many levels, will it is existing in real time
Clock circuit finely divides different function circuit (counting circuit 1, logic control circuit 2, interface control circuit 3 and data storage
Circuit 4), and pass through different function circuit (counting circuit 1, logic control circuit 2, interface control circuit 3 and data storage circuitry
4) low to realize using different electrical power (the first power supply and second source) and driving clock (external crystal oscillator, workclk)
The extremely low power dissipation real time clock circuit of cost, to reduce power consumption when real time clock circuit work to greatest extent.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (7)
1. a kind of extremely low power dissipation real time clock circuit, which is characterized in that including counting circuit, logic control circuit, Interface Controller
Circuit, data storage circuitry, the first power supply and second source；
The counting circuit, logic control circuit and interface control circuit are connect with data storage circuitry respectively, the logic control
Circuit processed is connect with interface control circuit；
First power supply is connect with logic control circuit, and is powered for logic control circuit；
The second source is connect with counting circuit, interface control circuit and data storage circuitry respectively, and is respectively to count electricity
Road, interface control circuit and data storage circuitry power supply.
2. extremely low power dissipation real time clock circuit as described in claim 1, which is characterized in that the counting circuit and external crystal
Oscillator connection, and using external crystal oscillator as work clock.
3. extremely low power dissipation real time clock circuit as claimed in claim 2, which is characterized in that the external crystal oscillator is
32768Hz crystal oscillator.
4. extremely low power dissipation real time clock circuit as described in claim 1, which is characterized in that the counting circuit includes multiple strings
The trigger of connection.
5. extremely low power dissipation real time clock circuit as claimed in claim 4, which is characterized in that the counting circuit includes 15 strings
The trigger of connection.
6. extremely low power dissipation real time clock circuit as described in claim 1, which is characterized in that first power supply is can power down electricity
Source.
7. extremely low power dissipation real time clock circuit as described in claim 1, which is characterized in that the second source is supplied by battery
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820750742.XU CN208351371U (en) | 2018-05-17 | 2018-05-17 | Extremely low power dissipation real time clock circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820750742.XU CN208351371U (en) | 2018-05-17 | 2018-05-17 | Extremely low power dissipation real time clock circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208351371U true CN208351371U (en) | 2019-01-08 |
Family
ID=64889897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820750742.XU Active CN208351371U (en) | 2018-05-17 | 2018-05-17 | Extremely low power dissipation real time clock circuit |
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| Country | Link |
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| CN (1) | CN208351371U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117472146A (en) * | 2023-12-27 | 2024-01-30 | 苏州元脑智能科技有限公司 | Real-time clock circuit and computing device |
-
2018
- 2018-05-17 CN CN201820750742.XU patent/CN208351371U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117472146A (en) * | 2023-12-27 | 2024-01-30 | 苏州元脑智能科技有限公司 | Real-time clock circuit and computing device |
| CN117472146B (en) * | 2023-12-27 | 2024-03-01 | 苏州元脑智能科技有限公司 | Real-time clock circuit and computing device |
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