CN201047906Y - Chip of analogue watch - Google Patents

Abstract

An analogue watch chip relating to electric clocks and watches comprises an oscillation module, a frequency division module, a motor driving waveform generating module, a rotation detecting module and an output control module. The utility model is characterized in that the analogue watch chip also comprises a driving-grade control module which performs statistics of motor driving conditions and confirms the motor driving-grade signal according to motor rotating information detected by the rotation detecting module; the motor driving waveform generating module, according to the motor driving-grade signal, produces an output signal with the corresponding pulse width to the output control module; the driving-grade control module records the motor rotating information detected by the rotation detecting module and, according to motor rotating conditions of a cycle and a previous cycle, confirms the motor driving-grade signal of the next cycle; the motor driving waveform generating module, according to the motor rotating information, produces corresponding strengthened pulses to the output control module. The utility model has accurate travel and low power consumption.

Description

A kind of pointer watch chip

Technical field

The utility model relates to electric timepiece, relates in particular to a kind of pointer watch chip.

Background technology

Existing pointer watch chip has two kinds: the common pointer watch chip of fixed pulse width and the patent No. are the pointer watch chip of 200620054684.4 disclosed automatic regulating impulse width.Common pointer watch chip only rotates for stepper motor provides the pulse of a fixed width to drive pointer in order to the drive motor rotor, has following problem:

1) if drive with bigger pulse width, the complete machine electric current is increased, shorten battery serviceable life.

2) if drive with less pulse width, the discreteness of stepper motor coil parameters is bigger, always has some motors that are in the parameter edge sometime can't be by accurate normal the driving, cause stopwatch, slowly table phenomenon and cause yields to descend.

3) when pointer that stepping motor rotor drove is subjected to unexpected resistance, for example: the stopping of dust, hand-manipulating of needle watch have stopwatch, slowly table may and cause yields to descend.

Automatically the pointer watch chip of regulating impulse width can drive once more at intensification pulse of normal burst drive stepping motor failure back generation.Though can overcome the above-mentioned shortcoming of common pointer watch chip like this but also produced new problem, when load back when cell voltage decline or stepper motor is big, former normal burst width can't drive stepping motor produce enough moment to drive the pointer rotation, characteristic according to the pointer watch chip of automatic regulating impulse width, can produce intensification pulse drive stepping motor once more, thereby cause more current drain, shorten battery serviceable life.

Summary of the invention

The purpose of this utility model is to provide a kind of pointer watch chip, descends the load of back or stepper motor when big to overcome in the prior art when cell voltage, and current drain is big, battery short shortcoming in serviceable life.

The pointer watch chip that the utility model adopted, comprise oscillation module, frequency division module, motor-driven waveform generation module, rotate detecting module and output control module, wherein, described oscillation module, frequency division module links to each other successively with motor-driven waveform generation module, motor-driven waveform generation module and rotation detecting module, link to each other in twos between the output control module, rotate detecting module and provide the motor rotation information to motor-driven waveform generation module by motor sampling to output control module, output control module is finished corresponding motor-driven according to the output signal of motor-driven waveform generation module, it is characterized in that: also comprise driving the grade control module, described driving grade control module is according to rotating the detected motor rotation information of detecting module, the motor rotation situation is added up, determine the motor-driven level signal, described motor-driven waveform generation module produces the output control module that outputs signal to of corresponding pulsewidth according to the motor-driven level signal.

Described driving grade control module record rotates the detected motor rotation information of detecting module, according to the motor rotation situation before this cycle and this cycle, determine the motor-driven level signal in next cycle, motor-driven waveform generation module produces corresponding intensification pulse to output control module according to the motor rotation information.

Described driving grade control module comprises that first timer circuit, rotation frequency of failure counter circuit, driving grade register circuit also link to each other successively with decoding scheme, described rotation frequency of failure counter circuit directly links to each other with the rotation detecting module, receive the motor rotation information, wherein

The number of times of described first timer circuit record drive motor;

Described rotation frequency of failure counter circuit record motor rotates the number of times of failure;

Described driving grade register circuit writes down the grade of current drive motor;

The content that described decoding scheme will drive the grade register circuit converts corresponding motor-driven level signal to motor-driven waveform generation module.

The beneficial effects of the utility model are: in the utility model, in existing pointer watch chip, set up and drive the grade control module, drive the grade control module according to rotating the detected motor rotation information of detecting module, the motor rotation situation is added up, determine the motor-driven level signal, motor-driven waveform generation module produces the output control module that outputs signal to of corresponding pulsewidth according to the motor-driven level signal, like this, driving the grade control module just can be according to the situation of stepper motor rotation in a period of time, select the driving pulse drive stepping motor of suitable width to rotate, thereby realize judging objectively the state of battery, not only guarantee accurately walking but also power consumption is reduced to as much as possible minimum of pointer, prolonged battery serviceable life.Simultaneously, when also having overcome pointer that existing hand-manipulating of needle meter step motor rotor driven and be subjected to unexpected resistance and cause hand-manipulating of needle watch have stopwatch, slowly table may and the shortcoming that causes yields to descend, and the pointer watch chip of regulating impulse width continues to use maximum pulse under the situation of driving force deficiency and causes consuming too much electric current automatically, the problem of battery shortening in serviceable life, improve the complete machine yields, and prolonged the serviceable life of product battery.

Description of drawings

Fig. 1 is the utility model general structure synoptic diagram;

Fig. 2 is the electrical block diagram that drives the grade control module in the utility model;

Fig. 3 is the utility model basic controlling flow process synoptic diagram;

Fig. 4 is the circuit diagram of motor-driven waveform generation module in the utility model;

Fig. 5 is the circuit diagram that rotates detecting module in the utility model;

Fig. 6 is the circuit diagram of output control module in the utility model;

Fig. 7 is the circuit diagram that drives the grade control module in the utility model;

Fig. 8 is H type stepper motor driving circuit and a direction of current in the utility model;

Fig. 9 is the waveform of motor-driven end when stepping motor rotor rotates first kind of situation (＞180 °) in the utility model;

Figure 10 is the waveform of motor-driven end when stepping motor rotor rotates second kind of situation (＜45 °) in the utility model;

The waveform of motor-driven end when Figure 11 rotates the third situation (＞45 ° and＜90 °) for stepping motor rotor in the utility model;

The waveform signal sequential chart of Figure 12 when the stepper motor input end is driven under first kind of situation in the utility model;

The waveform signal sequential chart of Figure 13 when stepper motor input end OUT1 is driven under second kind of situation in the utility model;

The waveform signal sequential chart of Figure 14 when stepper motor input end OUT2 is driven under second kind of situation in the utility model;

Figure 15 is the concrete control flow synoptic diagram of the utility model.

Embodiment

With embodiment the utility model is described in further detail with reference to the accompanying drawings below:

According to Fig. 1, the utility model comprises oscillation module 1, frequency division module 2, motor-driven waveform generation module 3, rotates detecting module 4, output control module 5 and drives grade control module 6, oscillation module 1, frequency division module 2 and motor-driven waveform generation module 3 link to each other successively, and motor-driven waveform generation module 3 links to each other in twos with rotating between detecting module 4, the output control module 5.

As shown in Figure 1, to produce former shaking by the miniature crystal oscillator in the clock and watch usually be 32768 hertz standard clock signal for oscillation module 1; Frequency division module 2 connects the output of oscillation module 1, and frequency division module 2 is used for above-mentioned standard signal is carried out frequency division in proper order, produces the signal of the required frequency of circuit working.The input of motor-driven waveform generation module 3 connects the output of frequency division module 2, rotates the enable signal DETECT_EN of detecting module 4 with generating needed various timing waveforms of motor-driven and control.

Rotate detecting module 4 and provide the motor rotation information by the motor sampling to output control module 5 to motor-driven waveform generation module 3, output control module 5 is finished corresponding motor-driven according to the output signal of motor-driven waveform generation module 3.

Drive grade control module 6 according to rotating detecting module 4 detected motor rotation information, record rotates detecting module 4 detected motor rotation information, the motor rotation situation is added up, drive grade control module 6 according to the motor rotation situation before this cycle and this cycle, determine the motor-driven level signal in next cycle, motor-driven waveform generation module 3 outputs signal to output control module 5 according to what the motor-driven level signal produced corresponding pulsewidth, and motor-driven waveform generation module 3 produces corresponding intensification pulse to output control module 5 according to the motor rotation information.

Particularly, as shown in Figure 1, rotate detecting module 4 and periodically monitor two step motor drive output ports (OUT1, OUT2), sample, after the motor in the output control module 5 is activated the certain hour interval, rotating detecting module 4 outputs to feedback signal ENHANCE_DISABLE (being the motor rotation information) motor-driven waveform generation module 3 and drives grade control module 6, thereby, drive grade control module 6 is selected proper width according to the situation of stepper motor rotation in a period of time normal burst.

As shown in Figure 3, basic controlling flow process of the present utility model is as follows:

1) rotates detecting module 4 and detect the motor rotation information, be passed to and drive grade control module 6.

2) drive 6 pairs of motor rotation situation of grade control module and add up, determine the motor-driven level signal, and send it to motor-driven waveform generation module 3.

3) motor-driven waveform generation module 3 outputs signal to output control module 5 according to what the motor-driven level signal produced corresponding pulsewidth.

As shown in Figure 2, drive grade control module 6 and comprise that the first timer circuit TIMER1, rotation frequency of failure counter circuit TIMER2, driving grade register circuit TIMER3 also link to each other successively with decoding scheme DECODER, rotate frequency of failure counter circuit TIMER2 and directly link to each other, receive the motor rotation information with rotation detecting module 4.

As shown in Figure 2, the number of times of first timer circuit TIMER1 record drive motor, rotate frequency of failure counter circuit TIMER2 record motor and rotate the number of times of failing, drive the grade that grade register circuit TIMER3 writes down current drive motor, the content that decoding scheme DECODER will drive grade register circuit TIMER3 converts corresponding motor-driven level signal to motor-driven waveform generation module 3.

The circuit diagram of motor-driven waveform generation module 3 as shown in Figure 4, motor-driven waveform generation module 3 has been realized most logical process functions, and its major function is the waveform that the feedback signal EHANCE_DISABLE combination generation of the signal of the various frequencies of frequency division module 2 outputs and rotation detecting module 4 is used to control output control module 5 and rotation detecting module 4." 256Hz " is 256 hertz clock signal, and " 64Hz " is 64 hertz clock signal, and they are used for producing signal " 6 " and (Fig. 4) control the time span (as Figure 13 12) that begins to detect from beginning to be driven into." 1Hz " is that 1 hertz clock signal is used to control the frequency that entire circuit produces drive controlling and coherent signal." 1024Hz_1 " is 1024 hertz clock signal, " 1024Hz_2 " is " 1024Hz_1 " clock signal through 1/4 cycle delay, the signal " 8 " that produces (Fig. 4) is used to generate on signal GP1, the GP2 control motor driven port and draws PMOS (P1, P2) unlatching, the signal of generation " DETECT_EN " are used to control enabling of rotation detecting module 4." 128Hz " is that 128 hertz clock signal produces the width (as among Figure 13 13) of signal " 10 " control driven pulse with " 256Hz "." 32Hz " is 32 hertz clock signal, is used for producing signal " 15 " and (Fig. 4) controls the width (as Figure 13 15) that replenishes driving pulse." 16Hz " is 16 hertz clock signal, is used to produce signal " 16 " and (Fig. 4) controls the clear terminal of RS latch." 12 " are to replenish the driving pulse reset signal (Fig. 4), be high level at ordinary times, after rotor successfully rotates 180 °, because the variation of feedback signal " ENHANCE_DISABLE ", " 12 " can produce a low level negative pulse on (Fig. 4), and " DFF1 " can be cleared at this moment." DFF1 " and " DFF2 " is d type flip flop, is used to preserve the enable signal of additional driving pulse of the current and next cycle of rotor.The control signal that signal " 7 " (Fig. 4) has comprised driven pulse and additional driving pulse is used to generate signal " GP1 ", " GP2 ", " GN1 ", " GN2 ".

The circuit diagram of rotation detecting module 4 as shown in Figure 5, its major function is fixedly in the period motor-driven end to be sampled with fixed frequency the back at interval at driven motor certain hour, and the result that will sample outputs on the feedback signal ENHANCE_DISABLE." DETECT_EN " is the effective enable signal of high level, after stepper motor is driven the back certain hour, a string frequency is that 1024 hertz, dutycycle are that 1: 2 pulse meeting outputs to " DETECT_EN " and goes up (seeing Figure 13), (OUT1's circuit OUT2) samples to above-mentioned stepper motor two ends when pulse is high level.When foregoing circuit collects the feature of stepping motor rotor rotation, can go up in feedback signal " ENHANCE_DISABLE " and produce a low level pulse.Above-mentioned low level pulse can output to motor-driven waveform generation module 3, make its motor-driven pulse that can not produce reinforcement output, and at once enable signal DETECT_EN is changed to low level, no longer exports pulse (seeing Figure 12) at this electric motor driven cycle.Never collect the feature that motor rotates if rotate detecting module 4 between " DETECT_EN " is for high period, then " ENHANCE_DISABLE " can keep high level always.Therefore, motor-driven waveform generation module 3 can produce the driving pulse (seeing Figure 13) of a reinforcement again after the 15.625ms of output driven pulse, even and detect the motor rotation feature but still can produce the driving pulse of a reinforcement after a period of time of normal length motor-driven pulse when motor-driven next time.That is to say, if after normal motor drives, do not detect the motor rotation feature, motor-driven waveform generation module 3 can be after this and next normal motor drive each driving pulse that increases the output reinforcement export.

The circuit diagram of output control module 5 as shown in Figure 6, output control module 5 outputs to the motor-driven input end to the motor-driven waveform in turn by certain frequency.Frequency when pointer is walked in the present embodiment is decided to be 1 hertz, therefore 5 pairs 1 hertz clock input signals of output control module " 1Hz " carry out the frequency division of afterbody, positive and negative according to " TFF1 " frequency division output, waveform in conjunction with input " 7 ", " 8 ", " 9 " drives OUT1, OUT2 in turn by the control to PMOS P1, P2 and NMOS N1, N2, and then realizes stepper motor 1 time driving in 1 second.Become the output of 0.5 clock by 1 hertz behind clock signal " 1Hz " the process T trigger, its positive output " 0.5Hz_B " and negative output " 0.5Hz " enable the control signal of two motor-driven output ports respectively.When " 0.5Hz " is high level, the control signal of motor-driven output port OUT1 is enabled, the drive waveforms of " 7 ", " 8 ", " 9 " is output on the OUT1, and the control signal conductively-closed of OUT2 at this moment, OUT2 keeps high level state (as Figure 12) always.Vice versa, when " 0.5Hz_B " was high level, the control signal of motor-driven output port OUT2 was enabled, and the drive waveforms of " 7 ", " 8 ", " 9 " is output on the OUT2, and the control signal conductively-closed of OUT1 at this moment, OUT1 keeps high level state (as Figure 12) always." RESET " is power-on reset signal, and whole output control module quits work when it is high level.The rotation of the folding control step motor of PMOS (P1, P2) and NMOS (N1, N2).Work as GP1, GN1 is a low level, GP2, and when GN2 was high level, electric current was from left to right by motor, the current direction the when PATH2 among Fig. 8 shows the stepper motor coil and is activated, this moment, rotor rotated 180 °.Vice versa, and when GP2, GN2 are low level, when GP1, GN1 were high level, electric current was from right to left by motor coil (seeing PATH2 among Fig. 8), and this moment, rotor rotated 180 ° again.Go round and begin again, the pointer that rotor drives will not stop makes circular motion.The folding of PMOS control end GP3, GP5 is to be used for cooperating rotation detecting module 4 to gather the motor rotation features, after driving OUT1, rotating detecting during the cycle (among Figure 13 " 14 "), PMOS P3, P2 open and NMOS N1, N2, P1, P5 by the time, the induced current that produces after the rotor rotation can induce negative voltage on OUT1.In like manner, after driving OUT2, rotating detecting during the cycle, PMOS P1, P5 unlatching and NMOSN1, N2, P2, P3 by the time (Figure 14), the induced current that produces after the rotor rotation can induce negative voltage on OUT2.After the character voltage of above-mentioned OUT1, OUT2 is rotated detecting module 4 samplings, convert the variation of feedback signal " ENHANCE_DISABLE " to through logical combination, judge whether success of step motor drive by motor-driven waveform generation module 3, as the foundation of whether replenishing intensification pulse.

The circuit diagram of driving grade control module 6 as shown in Figure 7, its major function is the number of times that the record stepper motor rotates failure in setting-up time (by the mask set of options), when the frequency of failure is just strengthened one-level with driving force during greater than setting value (by the mask set of options), be about to the driven pulse width and increase one-level, the driven pulse width is divided into some levels in the utility model, progression is by the mask set of options, and the pulse width that increases between each grade is also in advance by the mask set of options.In the utility model, the motor-driven highest ranking the pulsewidth of corresponding output signal more than or equal to the pulsewidth (in the present embodiment, highest ranking is a Pyatyi, and its pulsewidth is consistent with the pulsewidth value of intensification pulse) of intensification pulse.When driving reaches the superlative degree, strengthen driving pulse conductively-closed is fallen, because the width of driven pulse this moment is the same with the width of strengthening driving pulse.TIMER1 is that each drive cycle adds 1 counter, TIMER2 adds 1 when each stepper motor rotates failure, TIMER3 is the register of record when the front wheel driving grade, if the count value in every setting-up time among the TIMER2 has surpassed predefined number of times, then driving grade increases one-level and is recorded among the TIMER3.The mutually deserved pulse width control signal of value output that control output PULSE_CTRL is different according to TIMER3.The ENHANCE_PULSE signal is used for shielding reinforcement driving pulse when level V.CP1 is the clock of TIMER1 and TIMER2, and CP512, CP256, CP128 and CP64 are used to be combined into the pulse control signal of various width.POR is a power-on reset signal, and MOTOR_SET is one second reset signal once, and it if stepper motor rotates failure then produces a time clock, otherwise does not just have clock generating with the clock of ENHANCE_DISABLE as TIMER2.

The working method of hand-manipulating of needle table is exactly cycle stepper motor is driven in fact, the essence that drives is exactly to allowing the coil of electric current by motor, produce into the polarity magnetic field identical, promote rotor rotation and then drive hand-manipulating of needle list index to rotate because homopolar-repulsion produces thrust with rotor polarity.Because driving circuit adopts H structure (as Fig. 8), therefore each direction of current by motor coil is opposite with last driving, when P1, N2 unlatching and P2, N1 end, electric current flows from the left-to-right of motor, direction is consistent with PATH1 among Fig. 8, produce the magnetic field identical, promote 180 ° of rotor rotation with rotor polarity.When P2, N1 unlatching and P1, N2 end, electric current flows from the right-to-left of motor, direction is consistent with PATH2 among Fig. 8, produce and opposite polarity magnetic field last time, just identical with rotor polarity again and promote it and rotate, constantly circulation repeats the rotation that above-mentioned two steps just can make electronics rotor drive hand-manipulating of needle list index not stop.Because hand-manipulating of needle table power supply is fixed as 1.5V, so pointer watch chip is by width (being the time span that P1, N2 or P2, the N1 open) decision of driving pulse to the size of motor-driven ability.The width of motor-driven pulse is fixed in the hand-manipulating of needle table formerly, can produce the pointer of three enough strong magnetic fields to promote rotor and to be drawn in order to guarantee coil, and pulse width is always chosen a big as far as possible value.So the reason of making is that the every electric parameter of stepper motor has certain discreteness, specific to the phenomenon of individuality be exactly the torsion that on different motors, produces of identical pulsewidth be different.On the other hand, rotor when driving pointer and moving in a circle since deviation, the dust of gear manufacturing stop or calendar watch in need to promote the calendar rotating disk, the resistance that pointer is subjected in all angles is different.

In sum, be subjected to the variation of resistance size, caused and when producing in enormous quantities, understood some hand-manipulating of needle watch because above two factors and table or stopwatch reduce the product yield slowly because motor produces the have deviation and the rotor of torque magnitude.Yet,,, must increase power consumption and make shorter battery life though can on yield, increase if remove drive motor with excessive pulsewidth.Clearly, single increase pulse width is not the good method of dealing with problems.The utility model is started with from the rotary state that the judgement motor is activated its rotor of back, when finding that rotor does not rotate, just replenish the driving pulse (pulse width lengthening) of a reinforcement, torsion when increasing its rotation breaks through obstacle and works on, and in order to prevent that false judgment is at the next drive cycle also driving pulse of an additional reinforcement.The rotary state of following labor rotor, result after motor is driven has 3, all be reflected on the motion state of its rotor, first kind of situation is that motor is driven smoothly, 180 ° of rotor rotation, in this case, because motor self can produce reverse induced current, therefore can produce negative pulse (as Fig. 9) at a motor-driven end, and its level can be also lower than threshold voltage (Vth), can be captured by circuit.Second kind of situation is to drive failure, rotor is subjected to stopping its movement angle very little almost motionless (＜45 °), in this case, can not produce reverse induced current, therefore can not produce negative pulse (as Figure 10) at a motor-driven end because rotor has to rotate therefore.The third state is to drive to be obstructed, rotor is got back to initial position again after being subjected to being blocked in its certain angle that moved (＞45 ° and＜90 °), in this case, only can produce less reverse induced current because the rotor rotation amplitude is little, therefore the end at motor also can produce negative pulse (as Figure 11), but amplitude is littler than first kind of situation.Because its level might be below or above Vth, so the phenomenon that can occur judging by accident, promptly rotor does not rotate 180 °, but circuit detects the feature of induced current thereby does not have to produce the driving pulse (driving pulsewidth extends) that replenishes reinforcement.Under extreme case, rotor can block somewhere, in certain angle back and forth the shake, can't drive pointer be rotated further cause when part hand-manipulating of needle watch is walked aborning slow.Because after erroneous judgement occurring, rotor do not rotate 180 ° and get back to and drive before identical position, but motor-driven next time direction of current is opposite with last time, the magnetic force direction that produces and different the attracting each other of polarity of rotor can't produce thrust, and rotor is rotated.Having caused rotor might be stuck in certain position causes hand-manipulating of needle watch to show slowly or the problem of stopwatch for a long time, because this time drive cycle only comprises the driven pulse after the shake of rotor low-angle occurring erroneous judgement to occur, the motion state of drive motor rotor is to belong to above-mentioned second kind of situation certainly next time, certainly can allow the rotation detecting module identify, even but also can't not make rotor rotation, so if just can't break through obstacle for a long time and cause hand-manipulating of needle watch to show slowly or the problem of stopwatch surveying to replenish intensification pulse then may make rotor be stuck in certain position less than the cycle of rotor rotation to replenishing intensification pulse owing to produce the direction in magnetic field.At this problem, in the utility model, adopted continuous intensification pulse method of driving, can prevent that rotor is stuck in certain angle, promptly detecting after rotor do not have rotation, after subnormal driving, increasing an additional reinforcement driving immediately, and whether drive success in driving next time and all increase an additional reinforcement driving, this method has avoided the electronics rotor to continue to rest under the third state that can't determine.

But, even survey accurately when cell voltage descends or stepper motor load when overweight, former driven pulse has been not enough to drive stepping motor, each driving all can produce the reinforcement driving pulse, because strengthening the electric energy that driving pulse consumed is 3 to 4 times of the driven pulse, so can shorten the serviceable life of battery.Used driving force control, when cell voltage descends or stepper motor load when overweight, chip can be adjusted to a suitable value to the driven pulsewidth to produce enough driving moments, avoid occurring all producing the situation of intensification pulse at every turn, thereby not only guaranteed the driving of stepper motor but also reduced the power consumption of system.

As shown in figure 15, concrete control flow of the present utility model is as follows:

1, rotates detecting module 4 and detect motor rotation information (being feedback signal ENHANCE_DISABLE), it is passed to driving grade control module 6 and motor-driven waveform generation module 3, as shown in Figure 2, in driving grade control module 6, the first counter TIMER1 can add 1 automatically in each cycle, if accumulative total time greater than setting value (by the mask set of options) after, first counter TIMER1 meeting automatic clear, and produce the also zero clearing of TIMER2 that signal will write down failure driving number of times.

2, drive grade control module 6 and judge whether current motor-driven grade is highest, as shown in Figure 2, can obtain current driving grade by TIMER3, carries out following operation:

If 21 is highest, continue following steps 7.

22 otherwise, continue following steps 3.

3, judge that whether this cycle motor-driven is successful, carries out following operation:

31, if this cycle motor-driven is successful, whether motor-driven waveform generation module 3 further judgement motor-driven of last one-period is successful, if get nowhere, then determines to set up intensification pulse; If intensification pulse is not then set up in success.Continue following steps 4;

32 otherwise, drive 6 pairs of motors of grade control module and rotate the frequency of failure and add up, drive in the grade control module 6, TIMER2 adds 1, carries out following operation:

321, exceed a threshold values T when the motor-driven frequency of failure, promptly TIMER2＞T increases a motor-driven grade, as shown in Figure 2, in driving grade control module 6, the TIMER1 zero clearing, TIMER3 adds 1, continues following steps 5;

322 otherwise, motor-driven waveform generation module 3 determines to set up intensification pulse, continues following steps 4.

4, keep current motor-driven grade, in driving grade control module 6, TIMER1, TIMER3 are constant, continue following steps 5.

5, drive grade 6 minute book cycle of control module motor-driven result, TIMER1 wherein, TIMER2, TIMER3 finish necessary renewal.

6, drive the decoding scheme DECODER of grade control module 6 by wherein the motor-driven level signal is sent to motor-driven waveform generation module 3.

7, motor-driven waveform generation module 3 is according to motor-driven level signal and determined intensification pulse information, and what produce corresponding pulsewidth outputs signal to output control module 5.

In the utility model, by being rotated the frequency of failure, adds up by motor, when the motor-driven frequency of failure exceeds a threshold values, increase a motor-driven grade, realized little by little strengthening automatically moment, avoided the long-time phenomenon that produces intensification pulse in the prior art, be unlikely to consume battery power too much again as much as possible, make the utility model guaranteeing accurate, the normal operation of pointer and save between the energy content of battery to have reached a good balance, further improved practicality of the present utility model and operability.

In the utility model, if current motor-driven grade is highest, then motor-driven waveform generation module 3 directly outputs signal to output control module 5 according to what this motor-driven level signal produced corresponding pulsewidth, at this moment, the moment not contribution of intensification pulse to increasing motor set up intensification pulse and lost meaning, this design of the present utility model is for this situation, in fact intensification pulse is formed shielding, can reduce power consumption, further improved practicality of the present utility model.

In sum, although basic structure of the present utility model, principle are set forth by above-mentioned specific embodiment, under the prerequisite that does not break away from the utility model main idea, according to above-described inspiration, those of ordinary skills can not need to pay creative work can implement conversion/alternative form or combination, repeats no more herein.

Claims (3)

1. pointer watch chip, comprise oscillation module, frequency division module, motor-driven waveform generation module, rotate detecting module and output control module, wherein, described oscillation module, frequency division module links to each other successively with motor-driven waveform generation module, motor-driven waveform generation module and rotation detecting module, link to each other in twos between the output control module, rotate detecting module and provide the motor rotation information to motor-driven waveform generation module by motor sampling to output control module, output control module is finished corresponding motor-driven according to the output signal of motor-driven waveform generation module, it is characterized in that: also comprise driving the grade control module, described driving grade control module is according to rotating the detected motor rotation information of detecting module, the motor rotation situation is added up, determine the motor-driven level signal, described motor-driven waveform generation module produces the output control module that outputs signal to of corresponding pulsewidth according to the motor-driven level signal.

2. pointer watch chip according to claim 1, it is characterized in that: described driving grade control module record rotates the detected motor rotation information of detecting module, according to the motor rotation situation before this cycle and this cycle, determine the motor-driven level signal in next cycle, motor-driven waveform generation module produces corresponding intensification pulse to output control module according to the motor rotation information.

3. pointer watch chip according to claim 1 and 2, it is characterized in that: described driving grade control module comprises that first timer circuit, rotation frequency of failure counter circuit, driving grade register circuit also link to each other successively with decoding scheme, described rotation frequency of failure counter circuit directly links to each other with the rotation detecting module, receive the motor rotation information, wherein

The number of times of described first timer circuit record drive motor;

Described rotation frequency of failure counter circuit record motor rotates the number of times of failure;

Described driving grade register circuit writes down the grade of current drive motor;

The content that described decoding scheme will drive the grade register circuit converts corresponding motor-driven level signal to motor-driven waveform generation module.

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