CN107817869A - A kind of Bluetooth chip framework and the clock control method based on low-power consumption bluetooth chip - Google Patents
A kind of Bluetooth chip framework and the clock control method based on low-power consumption bluetooth chip Download PDFInfo
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- CN107817869A CN107817869A CN201711056162.7A CN201711056162A CN107817869A CN 107817869 A CN107817869 A CN 107817869A CN 201711056162 A CN201711056162 A CN 201711056162A CN 107817869 A CN107817869 A CN 107817869A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a kind of Bluetooth chip framework, comprise at least：High frequency clock source, it is configured to provide high precision clock to system and other functional modules；Low-frequency clock oscillator, it is configured to provide low-frequency clock to other modules described in Bluetooth chip；Low-frequency clock detection module, it is configured to the error-detecting that the system wake-up stage starting point at each bluetooth connection interval carries out a low-frequency clock, by the low-frequency clock error detected compared with a default low-frequency clock error threshold, and obtain comparative result；Low-frequency clock adjusting module, it is configured to adjust the low-frequency clock according to the comparative result, so that the clock of the low-frequency oscillator is maintained in an error range.
Description
Technical field
It is blue more particularly to a kind of Bluetooth chip framework and low-power consumption the present invention relates to Bluetooth wireless technology field
The clock control method of tooth chip.
Background technology
With the release of the specification of bluetooth 4.0, increasing equipment adds Bluetooth function, to realize and cell phone application
Connection and interactive, accordingly bring the agitation such as intelligent, the wearable product of hardware.In such applications, have greatly all
Using battery powered, there is higher requirement to low-power consumption, and low-power consumption bluetooth (the Bluetooth Low among the specification of bluetooth 4.0
Energy) specification, then can be good at meeting these demands, therefore the major part used in these applications is all to support low-power consumption
The chip of bluetooth.
In low-power consumption bluetooth chip, it will usually design two sets of clock systems of high and low frequency, high frequency clock mainly as
The send-receive clock source of system work clock and wireless signal, low-frequency clock are mainly used in park mode timing to save power consumption.
Among low-power consumption bluetooth specification, low-frequency clock is mainly used in the timing of low power sleep mode, it is necessary to accurately in special time
The stability that just can guarantee that bluetooth connection is waken up, thus has higher requirement to precision, at least to reach 500ppm, thus it is logical
Often in design using external crystal-controlled oscillation as clock source.
And the application of low-power consumption mode is not needed for part, or the application of bluetooth connection need not be kept for a long time,
This point may not necessarily then be considered, therefore the Bluetooth chip having can be by the way of interior RC oscillator, to save external low frequency
Crystal oscillator, so as to save overall BOM costs.
The content of the invention
The present invention provides a kind of when clock based on low-power consumption bluetooth chip (hereinafter statement is convenient, abbreviation Bluetooth chip)
Method processed, clock caused by the low-frequency oscillator of chip internal is set to disclosure satisfy that 500ppm even more highs among Bluetooth specification
It required precision, while saving external low frequency crystal oscillator to reach, can also enter low-power consumption mode, and ensure that stable bluetooth connects
Connect.
In one embodiment, the invention provides a kind of Bluetooth chip framework, it is characterised in that including：
High frequency clock source, it is configured to provide high precision clock to system and other functional modules；
Low-frequency clock oscillator, it is configured to provide low-frequency clock to other modules described in Bluetooth chip；
Low-frequency clock detection module, it is configured to the system wake-up stage starting point at each bluetooth connection interval and carries out one
The error-detecting of infra-low frequency clock, the low-frequency clock error detected and a default low-frequency clock error threshold are compared
Compared with, and obtain comparative result；
Low-frequency clock adjusting module, it is configured to adjust the low-frequency clock according to the comparative result, so that described low
The clock of frequency oscillator is maintained in an error range.
In one embodiment, the high frequency clock source is provided by external crystal-controlled oscillation or other kinds of external clock is defeated
Enter.
In one embodiment, the low frequency that the low-frequency clock detection module will detect after the completion of each detection
Clocking error value write error register.
In one embodiment, the low-frequency clock detection module by the low-frequency clock binary conversion error detected every time into phase
The frequency departure adjusted value answered simultaneously is write among the deviation register of the low-frequency clock adjusting module.
In one embodiment, when the low-frequency clock detection module detects the low-frequency clock error more than described pre-
If clocking error threshold value when automatically generate interruption and/or corresponding mark.
In one embodiment, the frequency departure adjusted value of the low-frequency clock adjusting module can be set by register
It is fixed.
In one embodiment, automatically according to the frequency departure of deviation register when the low-frequency clock adjusting module starts
Adjusted value is adjusted to low-frequency clock.
In one embodiment, the low-frequency clock adjusting module reaches about 10ppm to the Adjustment precision of low-frequency clock.
In one embodiment, the system and other functional modules are penetrated including CPU, bluetooth baseband process circuit, bluetooth
Frequency interlock circuit and other optional peripheral functionality modules.
Present invention also offers a kind of clock control method based on low-power consumption bluetooth chip, it is characterised in that the side
Method includes：
A. a low-frequency clock error threshold is preset；
After b bluetooth connections are established, the error-detecting of low-frequency clock is carried out in system wake-up stage starting point automatically；
C. after the error-detecting is completed every time, error result is converted into corresponding frequency departure adjusted value；
D. when detecting that low-frequency clock error exceedes the default low-frequency clock error threshold every time, produce corresponding
Interrupt；
E. when the interruption produces, low-frequency clock is adjusted according to the frequency departure adjusted value；
F. after the completion of low-frequency clock adjustment, return and perform step b.
Present invention also offers a kind of clock control method based on low-power consumption bluetooth chip, it is characterised in that the side
Method includes：
A. preset a clock alignment cycle, the clock alignment cycle is the integral multiple at bluetooth connection interval；
B. the system wake-up point in each clock alignment cycle starts the error-detecting of low-frequency clock；
C. the error amount of error-detecting is judged, step b is performed if error amount is smaller, if error amount is larger
Then perform step d；
D. by binary conversion error into frequency departure adjusted value, and low-frequency clock is carried out according to the frequency departure adjusted value
Adjustment；
E. after the completion of low-frequency clock adjustment, return and perform step b.
The technical effects of the invention are that：When technical scheme can make caused by the low-frequency oscillator of chip internal
Clock can fully meet the requirement of the 500ppm among Bluetooth specification, even up to 10ppm.Using framework provided by the invention and
Method, can save external low frequency crystal oscillator reduces holistic cost simultaneously, ensures stable bluetooth connection and low power mode of operation,
Suitable for all low-power consumption bluetooth application scenarios.
Brief description of the drawings
The above content of the invention and following embodiment of the present invention can obtain more preferably when being read in conjunction with the figure
Understanding.It should be noted that example of the accompanying drawing only as claimed invention.In the accompanying drawings, identical reference
Represent same or similar element.
Fig. 1 is system working stage schematic diagram under bluetooth connection status；
Fig. 2 is Bluetooth chip configuration diagram according to an embodiment of the invention；
Fig. 3 is the flow chart of one embodiment of Bluetooth chip clock control method according to an embodiment of the invention；
Fig. 4 is the flow chart of another embodiment of Bluetooth chip clock control method according to an embodiment of the invention.
Embodiment
The detailed features and advantage of the narration present invention, its content are enough to make any in detail in a specific embodiment below
Skilled in the art realises that the technology contents of the present invention and implement according to this, and specification according to disclosed by this specification, weigh
Profit requires and accompanying drawing, skilled person readily understands that purpose and advantage that the present invention is related.
The present invention provides a kind of clock control method based on low-power consumption bluetooth chip.In low-power consumption bluetooth connection procedure
Connect Event time points, using carry out clocking error detection of the high frequency clock to low-frequency oscillator, by error with it is default
Threshold value be compared, provide comparative result.Software decides whether that the clock adjustment for adjusting low-frequency oscillator is posted according to the result
Storage, so that the clock of low-frequency oscillator is maintained in certain error range；The error detection result of low-frequency clock can be
Interrupt mode or register flag；Software can also control hardware detecting module to carry out active inspection at any time
Survey.
Fig. 1 shows the schematic diagram of the system working stage under low-power consumption bluetooth equipment connection status.It is blue from Fig. 1
Tooth equipment be in connected state periodically send data, twice send data interval be referred to as bluetooth connection interval (Fig. 1's
S101).Bluetooth chip is system wake-up and the stage (Fig. 1 S102) to work when sending data, and is sending data twice
Interval among system into resting state, this stage is referred to as the dormant stage (Fig. 1 S103).The average work of chip
Make electric current and working stage and the electric current of dormant stage and the time strong correlation in each stage, therefore will be readily appreciated that,
Among one bluetooth connection interval, it is in that the time of working stage is longer, then dormancy time is shorter, accordingly when the system of chip
Average current is also bigger.
Fig. 2 is Bluetooth chip configuration diagram according to an embodiment of the invention.As shown in Fig. 2 the Bluetooth chip bag
During containing 201, one, high frequency clock source low-frequency clock oscillator, 202, low-frequency clock detection modules, 203, low frequency
Clock adjusting module 204, and system and other functional modules 205 etc..
Wherein, high frequency clock source 201 provides high precision clock to system and other functional modules 205, for whole system
Used during work, the clock source can be that external crystal-controlled oscillation provides or other kinds of external clock inputs.Low-frequency clock vibrates
Device 202, for providing low-frequency clock to other modules.Low-frequency clock detection module 203, for detecting the error of low-frequency clock.
Low-frequency clock adjusting module 204, for adjusting low-frequency clock frequency.Wherein, system and other functional modules 205 mainly include
CPU, bluetooth baseband process circuit, Bluetooth RF interlock circuit and other optional peripheral functionality modules, because not being related to this
Invention key content, does not elaborate herein.
Low-frequency clock detection module 203 has automatically and manually two kinds of mode of operations, under automatic operation mode, the module
When the system wake-up stage starting point (Fig. 1 S104) of each bluetooth connection interval (Fig. 1 S101) carries out an infra-low frequency
The error-detecting of clock, first-order error detection then can be carried out at any time by software control under manual work pattern.During low frequency
Clock detection module 203 can be by the error amount write error register of detection after the completion of each detection.Low-frequency clock detection module
The setting of clocking error threshold value can be carried out by register, when the module detects that low-frequency clock error can be with when being more than threshold value
Automatically generate interruption and corresponding mark.The low-frequency clock error amount that the low-frequency clock detection module 203 will can detect every time
It is converted among the deviation register of corresponding frequency departure adjusted value write-in low-frequency clock adjusting module 204.
The value of the deviation register of low-frequency clock adjusting module 204 also can be configured and be changed by register；Low frequency
Value when clock adjusting module 204 starts automatically according to deviation register is adjusted to low-frequency clock；Low-frequency clock adjusts mould
Block 204 can reach 10ppm to the Adjustment precision of low-frequency clock.
Low-frequency oscillator among Bluetooth chip is to be used to provide a system to clock in the dormant stage, if clocking error
It is larger, the time point (Fig. 1 S104) of system wake-up can be caused inaccurate, the bluetooth data packets of Receiving Host are led to miss and then lead
Broken string is caused, (Bluetooth specification requirement is little in less scope so if can not control the clocking error of low-frequency oscillator
In 500ppm), that must just allow system to shift to an earlier date enough surpluses and wake up, and so can bring about the increase of overall power.Obviously, by mistake
Difference is bigger, and power consumption is bigger.
Fig. 3 shows the flow chart of Bluetooth chip clock control method according to an embodiment of the invention.Bluetooth clock controls
Method comprises the following steps：
In step S301, after system electrification, software sets a low-frequency clock error to low-frequency clock detection module 203
Threshold value, enable the module and make it be operated in automatic mode.
In step s 302, after bluetooth connection is established, the low-frequency clock detection module starts automatically in each system
Awakening phase starting point (Fig. 1 S104) carries out the error-detecting of low-frequency clock.
In step S303, error result is converted into corresponding frequency by low-frequency clock detection module after detecting completion every time
Among rate deviation adjusting value write-in special tolerances register.
In step s 304, low-frequency clock detection module is detecting that low-frequency clock error exceedes default threshold value every time
When, produce corresponding interrupt.
In step S305, when above-mentioned interruption produces, software starts low-frequency clock adjusting module, when making its progress low frequency
The adjustment of clock.
In step S306, after the completion of low-frequency clock adjustment, software closes low-frequency clock adjusting module, jumps back to step
S302。
In this embodiment, because error-detecting is the working stage after system wake-up, hardware detecting module is rear
Platform is carried out automatically, can't take extra system processing time, only needs software short when finding that deviation exceedes predetermined threshold value
When intervention clock is adjusted.After low-frequency clock adjustment, system enters the error that sleep stage wakes up to next time and just controlled
System is in normal range (NR), so as to ensure the stabilization of bluetooth connection.Further, since time clock feature oscillator is in itself with temperature or voltage
Change can just produce deviation, be actually needed the number and infrequently into row clock adjustment, therefore because software to clock progress
Number that calibration system wake-up time for bringing of control is elongated and infrequently, the influence for system overall power can almost neglect
Slightly disregard.
Fig. 4 shows the flow of another embodiment of Bluetooth chip clock control method according to an embodiment of the invention
Figure, comprises the following steps.
After S401 steps, system electrification, enable the low-frequency clock detection module and make it enter manual mode.
In S402 steps, software presets a clock alignment cycle (Fig. 1 S105), and the cycle is bluetooth connection interval
Integral multiple.
In S403 steps, software detects mould in the startup low-frequency clock of the system wake-up point (Fig. 1 S106) in each cycle
Block carries out first-order error detection.
In S404 steps, software reads the error amount of above-mentioned low-frequency clock detection, and judges.Jumped if error amount is smaller
To S403, S405 is jumped to if error amount is larger.
In S405 steps, software by binary conversion error into frequency departure adjusted value, and be written into low-frequency clock adjustment mould
The deviation register of block, start low-frequency clock adjusting module and low-frequency clock is adjusted.
After the completion of S406 steps, low-frequency clock adjustment, software closes low-frequency clock adjusting module, jumps back to step
S403。
In this embodiment, because the cycle of error-detecting could be arranged to the several times at bluetooth connection interval, namely earlier above
One embodiment is bigger, therefore actual measurement shows that influence of this method for system overall power can be accomplished even more small.
In summary, the present invention provides a kind of clock control method for low-power consumption bluetooth chip, makes chip internal
Clock caused by low-frequency oscillator can fully meet the requirement of the 500ppm among Bluetooth specification, even up to 10ppm.Using
Method provided by the invention, can save external low frequency crystal oscillator reduces holistic cost simultaneously, ensures stable bluetooth connection and low
Power consumption mode of operation, suitable for all low-power consumption bluetooth application scenarios.
Here the term and form of presentation used is only intended to describe, and the present invention should not be limited to these terms and table
State.It is not meant to exclude the equivalent features of any signal and description (or which part) using these terms and statement, should recognizes
Knowing various modifications that may be present should also include within the scope of the claims.Other modifications, variations and alternatives also likely to be present.
Accordingly, claim should be regarded as covering all these equivalents.
Equally, it should be pointed out that although the present invention describes with reference to current specific embodiment, this technology neck
Those of ordinary skill in domain is it should be appreciated that the embodiment of the above is intended merely to the explanation present invention, without departing from the present invention
Various equivalent change or replacement can be also made in the case of spirit, therefore, as long as right in the spirit of the present invention
The change, modification of above-described embodiment will all fall in the range of following claims.
Claims (11)
1. a kind of Bluetooth chip framework, it is characterised in that comprise at least：
High frequency clock source, it is configured to provide high precision clock to system and other functional modules；
Low-frequency clock oscillator, it is configured to provide low-frequency clock to other modules described in Bluetooth chip；
Low-frequency clock detection module, the system wake-up stage starting point progress being configured at each bluetooth connection interval are once low
The error-detecting of frequency clock, by the low-frequency clock error detected compared with a default low-frequency clock error threshold, and
Obtain comparative result；Wherein low-frequency clock error threshold can be set by register；
Low-frequency clock adjusting module, it is configured to adjust the low-frequency clock according to the comparative result, so that the low frequency shakes
The clock for swinging device is maintained in an error range.
2. Bluetooth chip framework as claimed in claim 1, it is characterised in that the high frequency clock source by external crystal-controlled oscillation provide or
The other kinds of external clock input of person.
3. Bluetooth chip framework as claimed in claim 1, it is characterised in that the low-frequency clock detection module is detecting every time
After the completion of the low-frequency clock error amount write error register that will detect.
4. Bluetooth chip framework as claimed in claim 1, it is characterised in that the low-frequency clock detection module will detect every time
Low-frequency clock binary conversion error into corresponding frequency departure adjusted value and write the deviation of the low-frequency clock adjusting module and post
Among storage.
5. Bluetooth chip framework as claimed in claim 1, it is characterised in that when the low-frequency clock detection module detects institute
State and interruption and/or corresponding mark are automatically generated when low-frequency clock error is more than the default clocking error threshold value.
6. Bluetooth chip framework as claimed in claim 1, it is characterised in that the frequency departure of the low-frequency clock adjusting module
Adjusted value can be set by register.
7. Bluetooth chip framework as claimed in claim 1, it is characterised in that the low-frequency clock adjusting module is automatic when starting
Low-frequency clock is adjusted according to the frequency departure adjusted value of deviation register.
8. Bluetooth chip framework as claimed in claim 1, it is characterised in that the low-frequency clock adjusting module is to low-frequency clock
Adjustment precision reach about 10ppm.
9. Bluetooth chip framework as claimed in claim 1, it is characterised in that the system and other functional modules include CPU,
Bluetooth baseband process circuit, Bluetooth RF interlock circuit and other optional peripheral functionality modules.
10. a kind of clock control method based on low-power consumption bluetooth chip, it is characterised in that methods described includes：
A. a low-frequency clock error threshold is preset；
After b bluetooth connections are established, the error-detecting of low-frequency clock is carried out in system wake-up stage starting point automatically；
C. after the error-detecting is completed every time, error result is converted into corresponding frequency departure adjusted value；
D. when detecting that low-frequency clock error exceedes the default low-frequency clock error threshold every time, in producing accordingly
It is disconnected；
E. when the interruption produces, low-frequency clock is adjusted according to the frequency departure adjusted value；
F. after the completion of low-frequency clock adjustment, return and perform step b.
11. a kind of clock control method based on low-power consumption bluetooth chip, it is characterised in that methods described includes：
A. preset a clock alignment cycle, the clock alignment cycle is the integral multiple at bluetooth connection interval；
B. the system wake-up point in each clock alignment cycle starts the error-detecting of low-frequency clock；
C. the error amount of error-detecting is judged, step b is performed if error amount is smaller, is held if error amount is larger
Row step d；
D. by binary conversion error into frequency departure adjusted value, and low-frequency clock is adjusted according to the frequency departure adjusted value
It is whole；
E. after the completion of low-frequency clock adjustment, return and perform step b.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711056162.7A CN107817869A (en) | 2017-11-01 | 2017-11-01 | A kind of Bluetooth chip framework and the clock control method based on low-power consumption bluetooth chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711056162.7A CN107817869A (en) | 2017-11-01 | 2017-11-01 | A kind of Bluetooth chip framework and the clock control method based on low-power consumption bluetooth chip |
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| CN107817869A true CN107817869A (en) | 2018-03-20 |
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Cited By (9)
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| CN108650663A (en) * | 2018-03-23 | 2018-10-12 | 珠海慧联科技有限公司 | A kind of bluetooth module and its clock work method of low clock request |
| CN109511106A (en) * | 2018-12-29 | 2019-03-22 | 中颖电子股份有限公司 | A kind of wireless data transmission control method |
| CN111669812A (en) * | 2020-05-29 | 2020-09-15 | 上海橙群微电子有限公司 | Low-power-consumption Bluetooth chip, equipment, dormancy awakening control method of equipment and communication system |
| CN112579182A (en) * | 2020-11-26 | 2021-03-30 | 北京智芯微电子科技有限公司 | Chip wake-up control system and method and dormancy control system and method |
| CN112769413A (en) * | 2019-11-04 | 2021-05-07 | 炬芯科技股份有限公司 | High-pass filter, stabilizing method thereof and ADC recording system |
| CN112953514A (en) * | 2021-03-09 | 2021-06-11 | 炬芯科技股份有限公司 | Method and device for calibrating Bluetooth clock |
| CN113038445A (en) * | 2021-03-26 | 2021-06-25 | 上海磐启微电子有限公司 | Calibration method of Bluetooth sleep clock |
| CN113448379A (en) * | 2020-03-26 | 2021-09-28 | 安徽寒武纪信息科技有限公司 | Method, apparatus and computer-readable storage medium for frequency modulation of a chip |
| CN115038153A (en) * | 2022-08-10 | 2022-09-09 | 广州安凯微电子股份有限公司 | Low-power-consumption Bluetooth chip sleep mode control method and system |
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| CN108650663A (en) * | 2018-03-23 | 2018-10-12 | 珠海慧联科技有限公司 | A kind of bluetooth module and its clock work method of low clock request |
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| CN111669812A (en) * | 2020-05-29 | 2020-09-15 | 上海橙群微电子有限公司 | Low-power-consumption Bluetooth chip, equipment, dormancy awakening control method of equipment and communication system |
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| CN112579182B (en) * | 2020-11-26 | 2022-01-14 | 北京智芯微电子科技有限公司 | Chip wake-up control system and method and dormancy control system and method |
| CN112579182A (en) * | 2020-11-26 | 2021-03-30 | 北京智芯微电子科技有限公司 | Chip wake-up control system and method and dormancy control system and method |
| CN112953514A (en) * | 2021-03-09 | 2021-06-11 | 炬芯科技股份有限公司 | Method and device for calibrating Bluetooth clock |
| CN112953514B (en) * | 2021-03-09 | 2024-03-22 | 炬芯科技股份有限公司 | Method and device for calibrating Bluetooth clock |
| CN113038445A (en) * | 2021-03-26 | 2021-06-25 | 上海磐启微电子有限公司 | Calibration method of Bluetooth sleep clock |
| CN113038445B (en) * | 2021-03-26 | 2022-11-18 | 上海磐启微电子有限公司 | Calibration method of Bluetooth sleep clock |
| CN115038153A (en) * | 2022-08-10 | 2022-09-09 | 广州安凯微电子股份有限公司 | Low-power-consumption Bluetooth chip sleep mode control method and system |
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