CN202806677U - Keyless entry system and microprocessor arousing unit - Google Patents
Keyless entry system and microprocessor arousing unit Download PDFInfo
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- CN202806677U CN202806677U CN 201220525522 CN201220525522U CN202806677U CN 202806677 U CN202806677 U CN 202806677U CN 201220525522 CN201220525522 CN 201220525522 CN 201220525522 U CN201220525522 U CN 201220525522U CN 202806677 U CN202806677 U CN 202806677U
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Abstract
The utility model discloses a keyless entry system and a microprocessor arousing unit. The keyless entry system and the microprocessor arousing unit comprise an emitter and a receiver. The emitter comprises a data transmitting module which outputs high frequency data through a pin of transmit data (TXD) of a serial communication interface (SCI), wherein the data format of the high frequency data comprises an arousing head, a standard data head and an SCI data bit. The receiver comprises a data receiving module, a microprocessor and the microprocessor arousing unit. Time of arousing state of the microprocessor is shortened in a maximum limit, quiescent current of the keyless entry system is reduced, and then power dissipation of the keyless entry system is reduced.
Description
Technical field
The utility model relates to the automobile technical field of security and protection, relates in particular to a kind of keyless access system and microprocessor wakeup unit.
Background technology
Keyless access system is comprised of projector and receptor usually, and wherein, projector is remote-control key, and receptor is the base station, and comprises data reception module and microprocessor (Micro Control Unit, microprocessor).Projector is responsible for sending high-frequency data, receptor is installed in the car, and the data reception module on the receptor is responsible for receiving the signal of projector emission and the signal that receives is carried out filtering, removes carrier wave, the microprocessor of receptor is decoded the data that obtain wanting to the signal of removing behind the carrier wave.
Be the reduction system power dissipation, the sleep management mode that existing keyless access system adopts dormant and awakening to hocket usually, namely a dormant and awakening cycle is 100ms, wherein 10ms is in wake-up states.When being in dormant state, various parts all quits work, can not the executing data reception etc. task, this moment system quiescent current be the electric current of 1mA(microprocessor and high frequency receiver module be equal to or close to zero), least in power-consuming; When system is in wake-up states, the receptor electric current be 20mA(wherein, microprocessor is 15mA, the high frequency receiver module is 5mA), so the quiescent current of receiving end is (1*90+20*10)/100=2.9mA.
The shortcoming of above-mentioned keyless access system is: when system is in wake-up states, if microprocessor is never executed the task, but still be in wake-up states, namely need to provide for it electric current of 15mA, cause undoubtedly unnecessary power consumption, increased system power dissipation.
The utility model content
In view of this, the utility model provides a kind of microprocessor wakeup unit, to solve the technical matters that is in wake-up states for a long time and increases unnecessary energy consumption when microprocessor does not have task.For solving the problems of the technologies described above, microprocessor wakeup unit of the present utility model comprises:
Be used for receiving the high-frequency data that projector sends, and judge whether described high-frequency data has the first judge module that wakes head up;
Be used for having judged when waking up when described the first judge module, control the wake module that described microprocessor enters wake-up states.
Further, described wakeup unit also comprises:
Be used for when described microprocessor is in wake-up states, whether the task of judging described microprocessor complete the second judge module;
Be used for when described the second judge module is judged task and finished, controlling the sleep block that described microprocessor enters dormant state.
Particularly, described wake module is waken described microprocessor up by the spare bits wake-up mode.
The utility model also provides a kind of keyless access system, comprises projector and receptor, and described receptor comprises data reception module, microprocessor and above-mentioned microprocessor wakeup unit; Described projector comprises:
The data transmission blocks of the TXD pin output high-frequency data by serial communication interface SCI, wherein, the data format of described high-frequency data comprises and wakes head, normal data head and SCI data bit up.
Can find out from above-mentioned technical scheme, when waking up in the utility model has realized that and if only if the high-frequency data that receptor receives, just make microprocessor enter wake-up states, namely work as microprocessor without task, when not needing work, can keep dormant state always, thereby shorten to greatest extent microprocessor and be in the duration of wake-up states, reduce the quiescent current of keyless access system, and then reduced system power dissipation.
Description of drawings
Fig. 1 is the structural representation of the utility model keyless access system;
Fig. 2 is the structural representation of the utility model microprocessor wakeup unit.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the utility model keyless access system.By shown in Figure 1, keyless access system comprises receptor 1 and projector 2, wherein,
Described receptor comprises data reception module 10, microprocessor 11 and wakeup unit 12, wherein,
In the present embodiment, keyless access system of the present utility model is being judged when waking up, when the data that namely receive are required high-frequency datas, wake again microprocessor up, otherwise allow microprocessor enter dormant state, thereby improve the degree of utilization of microprocessor, reduce the system power dissipation of keyless access system.
Further, Fig. 2 is the structural representation of the wakeup unit 12 of the utility model microprocessor.As shown in the figure, wakeup unit 12 comprises the first judge module 120, wake module 121, the second judge module 122, sleep block 123.Wherein,
The first judge module 120 is used for judging whether the high-frequency data that data reception module 10 receives wakes head up.Wherein, because the data more complicated that data reception module 10 receives except the high-frequency data that microprocessor 11 needs, also has many clutters.Be equivalent to the zone bit of SCI data format and wake head up, so only have the high-frequency data that wakes head up, namely the data of SCI form are only the high-frequency data that needs, and just can wake microprocessor 11 up, thereby save the power consumption of microprocessor 11.
In addition and since SCI itself have can be by the cache read data function, so the microprocessor 11 of receptor need not participate in the time recording of data and the process of parsing, but can directly read the high-frequency data by the SCI reception from the SCI buffer memory.Therefore, the microprocessor system resource that the reception of high-frequency data need to take greatly reduces, and microprocessor load reduces greatly simultaneously.
The second judge module 122 is used for judging whether the task of microprocessor 11 is complete after wake module 121 is waken microprocessor 11 up.
Can find out from above-mentioned technical scheme, when having SCI to wake up in the data that data reception module receives that keyless access system of the present utility model has realized that and if only if, just wake microprocessor up, and when microprocessor executes task, make its again dormancy.With respect to prior art, keyless access system of the present utility model has reduced unnecessary power consumption having shortened to greatest extent microprocessor and be in the duration of wake-up states, has reduced the static system electric current, and then has reduced system power dissipation.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a microprocessor wakeup unit is characterized in that, described wakeup unit comprises:
Be used for receiving the high-frequency data that projector sends, and judge whether described high-frequency data has the first judge module that wakes head up;
Be used for having judged when waking up when described the first judge module, control the wake module that described microprocessor enters wake-up states.
2. wakeup unit according to claim 1 is characterized in that, described wakeup unit also comprises:
Be used for when described microprocessor is in wake-up states, whether the task of judging described microprocessor complete the second judge module;
Be used for when described the second judge module is judged task and finished, controlling the sleep block that described microprocessor enters dormant state.
3. wakeup unit according to claim 2 is characterized in that, described wake module is waken described microprocessor up by the spare bits wake-up mode.
4. a keyless access system comprises projector and receptor, it is characterized in that, described receptor comprises the described microprocessor wakeup unit of each claim among data reception module, microprocessor and the claim 1-3; Described projector comprises:
The data transmission blocks of the TXD pin output high-frequency data by serial communication interface SCI, wherein, the data format of described high-frequency data comprises and wakes head, normal data head and SCI data bit up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220525522 CN202806677U (en) | 2012-10-15 | 2012-10-15 | Keyless entry system and microprocessor arousing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201220525522 CN202806677U (en) | 2012-10-15 | 2012-10-15 | Keyless entry system and microprocessor arousing unit |
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| CN202806677U true CN202806677U (en) | 2013-03-20 |
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| CN 201220525522 Expired - Lifetime CN202806677U (en) | 2012-10-15 | 2012-10-15 | Keyless entry system and microprocessor arousing unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104346914A (en) * | 2014-10-22 | 2015-02-11 | 奇瑞汽车股份有限公司 | Radio frequency signal receiving module control method |
| CN104442633A (en) * | 2013-09-16 | 2015-03-25 | Trw汽车美国有限责任公司 | Method and apparatus for conserving energy in RKE and TPM vehicle systems |
| CN107444340A (en) * | 2016-05-12 | 2017-12-08 | 丰田自动车株式会社 | Wireless communication system |
-
2012
- 2012-10-15 CN CN 201220525522 patent/CN202806677U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104442633A (en) * | 2013-09-16 | 2015-03-25 | Trw汽车美国有限责任公司 | Method and apparatus for conserving energy in RKE and TPM vehicle systems |
| CN104442633B (en) * | 2013-09-16 | 2019-01-04 | Trw汽车美国有限责任公司 | The method and apparatus of energy is saved in RKE the and PTM system of vehicle |
| CN104346914A (en) * | 2014-10-22 | 2015-02-11 | 奇瑞汽车股份有限公司 | Radio frequency signal receiving module control method |
| WO2016062221A1 (en) * | 2014-10-22 | 2016-04-28 | 奇瑞汽车股份有限公司 | Method for controlling radio-frequency signal receiving module |
| CN104346914B (en) * | 2014-10-22 | 2017-12-12 | 奇瑞汽车股份有限公司 | A kind of rf signal reception module control method |
| CN107444340A (en) * | 2016-05-12 | 2017-12-08 | 丰田自动车株式会社 | Wireless communication system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co.,Ltd. Address before: B1 / F, Northern Territory, Dongsheng Science Park, 66 xixiaokou Road, Haidian District, Beijing 100192 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |
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| CX01 | Expiry of patent term |