JP3019324B2 - Analog electronic clock IC and analog electronic clock - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an analog electronic timepiece IC and an analog electronic timepiece having multifunctional display means such as a chronograph display and a timer display.

[Conventional technology]

Conventional multifunction analog electronic timepieces are disclosed in
As disclosed in JP-286783, JP-A-61-294388, and JP-A-61-26191, multiple functions have been realized individually using dedicated ICs.

The step motors used in these multifunction electronic timepieces are used for chronograph functions, alarm time display, etc.
It is set in a shape according to its function and arrangement on the movement, and its driving method is stable driving against loads such as shock applied to the rotor or increased viscosity resistance of lubricating oil in low temperature environment. The driving pulse is set so as to obtain the reliability, and the reliability is secured.

[Problems to be solved by the invention]

In the above-described conventional technology, a dedicated IC is required, so that the development period of the IC is long, and response to market needs is delayed.

The size of the change of the IC when the function was added or the specification was changed was large, and in the worst case, a new IC had to be used.

Function variations cannot be handled by one IC.

Cannot meet the diversifying consumer needs. In addition, the pulse width of the drive pulse of the stepping motor is set so that the rotor rotates reliably against the impact due to the drop and the load due to the viscosity of the lubricating oil at low temperature, and that a stable rotation can be obtained even in fast-forward hand operation. Due to the frequency setting, the stepper motor consumes quite extra power. For this reason, a large button-type battery is required, which has disadvantages such as hindering miniaturization and thinning.

The present invention is intended to eliminate the above-mentioned disadvantages, and its object is to shorten the development period, easily cope with addition of functions and specification changes, cope with function variations, and reduce the consumption of a step motor. It is an object of the present invention to provide an analog electronic timepiece IC and an analog electronic timepiece that satisfy diversifying consumer needs by realizing a small and thin movement by power.

[Means for solving the problem]

The analog electronic timepiece IC of the present invention has at least a core CP.
U, a program memory for storing software for operating the core CPU, a motor operation control circuit for outputting a drive control signal for each of the plurality of step motors based on a command of the software, and an output from the motor operation control circuit. And a plurality of motor driver circuits for driving the respective step motors in response to the drive control signals of the respective step motors.

The motor hand movement control circuit may include a plurality of motor clock control circuits for controlling the number of hand movement pulses of each step motor.

Further, the motor hand movement control circuit has a hand movement reference signal forming circuit that forms a hand movement reference clock that triggers movement of each step motor, and the hand movement reference signal forming circuit is based on a software command. Means for selecting the frequency of the hand movement reference clock may be provided.

A plurality of drive pulse forming circuits for outputting motor drive pulses having different waveforms; and a motor drive system control for determining which drive pulse is selected by each step motor based on a command of software. A circuit may be provided.

Further, an analog electronic timepiece of the present invention includes any of the above-described ICs for an analog electronic timepiece, a plurality of step motors, and a plurality of wheel train mechanisms connected to the plurality of step motors.

(Operation)

According to the above configuration of the present invention, the operation of the hands of the plurality of step motors can be freely controlled by the software stored in the program memory.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of an analog electronic timepiece IC of the present invention.

As shown in FIG. 1, the CMOS-IC 20 integrates a program memory, data memory, four motor drivers, a motor operation control circuit, a sound generator, an interrupt control circuit, etc. on one chip centering on a core CPU. This is a one-chip microcomputer for analog electronic watches. Hereinafter, FIG. 1 will be described.

Reference numeral 201 denotes a core CPU, which includes an ALU, an operation register, an address control register, a stack pointer instruction register, an instruction decoder, and the like. The peripheral circuits are connected to an address bus (adbus) and data by a memory mapped I / O method. They are connected by a bus (dbus).

Reference numeral 202 denotes a program memory including a mask ROM having a configuration of 2048 words × 12 bits, and stores software for operating the IC.

203 is an address decoder of the program memory 202.

Reference numeral 204 denotes a data memory including a RAM of 112 words × 4 bits, which is used as a timer for various clocks, a counter for storing the positions of the hands of the hands, and the like.

 205 is an address decoder of the data memory 204.

Reference numeral 206 denotes an oscillation circuit, which oscillates at 32768 Hz using a tuning fork crystal oscillator connected to the Xin and Xout terminals as a source oscillation.

Reference numeral 207 denotes an oscillation stop detection circuit which detects when the oscillation of the oscillation circuit 206 stops, and resets the system.

208 denotes a first frequency divider circuit, by sequentially dividing the 32768Hz signal phi _32k output from the oscillator circuit 206, and outputs a 16Hz signal phi _16.

A second frequency divider 209 divides a 16 Hz signal φ ₁₆ output from the first frequency divider 208 into a 1 Hz signal φ ₁ . In addition, 8
The state of each frequency division stage from Hz to 1 Hz can be read into the core CPU 201 by software.

Further, in the IC of the present embodiment, a 16 Hz signal φ ₁₆ , as a time interrupt Tint for processing such as clock measurement,
An 8 Hz signal φ ₈ and a 1 Hz signal φ ₁ are used. The time interrupt Tint is generated at the falling edge of each signal, and the reading, resetting and masking of each interrupt cause are all performed by software, and reset and mask can be individually performed for each cause.

210 is a sound generator, which forms a buzzer drive signal and outputs it to the AL terminal. The drive frequency, ON / OFF and ringing pattern of the buzzer drive signal can be controlled by software.

Reference numeral 211 denotes a chronograph circuit, which is specifically configured as shown in FIG. 2. When configuring a 1/100 second chronograph, software controls the movement of the 1/100 second hand by hardware. Can be significantly reduced.

In FIG. 2, reference numeral 211 denotes a clock forming circuit,
The 100Hz signal phi ₁₀₀ from Hz signal phi ₅₁₂ as a reference clock of the chronograph measurement, to form a clock pulse Pfc pulse width 3.91ms at 100Hz for forming a 1/100 second hand driving pulse Pf. 2112 is a 50-digit chronograph counter,
Chronograph reset signal output from the control signal forming circuit 2118 by counting φ ₁₀₀ passing through the AND gate 2119
Reset by Rcg. Reference numeral 2113 denotes a register which holds the contents of the chronograph counter 2112 when the split display command signal Sp is output from the control signal forming circuit 2118. Reference numeral 2114 denotes a 50-digit hand position counter, which stores the display position of the 1/100 second hand by counting the 1/100 second hand drive pulse Pf, and stores the φ position of the 1/100 second hand from the control signal forming circuit 2118. Is reset by the signal Rhnd. 2115 is a coincidence detection circuit, compares the contents of the register 2113 and the hand position counter 2114 and outputs a coincidence signal Dty when they match, 2116 is a φ position detection circuit,
When φ of the needle position counter 2114 is detected, a φ detection signal Dto is output. 2117 is a 1/100 second hand movement control circuit,
During the second hand operation state and during the chronograph measurement period, the clock pulse Pfc is passed when the contents of the chronograph counter 2112 and the hand position counter 2114 match, and the register 2113 and the hand position counter 2114 are displayed at the time of split display and measurement stop.
When the values do not match, the clock pulse Pfc is passed and 1/100
During the measurement of the chronograph while the second hand is not operating, the clock pulse Pfc is passed when the content of the hand position counter 2114 is other than φ. Reference numeral 2118 denotes a control signal forming circuit, which is a start signal St for instructing start / stop of chronograph measurement and a split signal for instructing split display / split display release by software instructions.
Sp, chronograph reset signal Rcg for commanding reset of chronograph measurement, φ position signal Rhnd for storing φ position of 1/100 second hand, and Drv for commanding operation / non-operation of 1/100 second hand Output. The 1/100 second hand drive is possible only with the step motor C. Also, chronograph interrupt CGint is generated by 5Hz carry signal phi ₅ of output from the chronograph counter 2112, it is possible to measure chronograph processing after 1/5 seconds by Soutouea.

Reference numeral 212 denotes a motor operation control circuit, which is specifically configured as shown in FIG. 3, and outputs a motor drive pulse to each motor driver based on a command from software.
Hereinafter, FIG. 3 will be described.

Reference numeral 219 denotes a motor hand operation control circuit which stores the hand operation of each motor in accordance with a command from software, and selects the normal rotation drive I and the normal rotation drive II.
Sb, Sc for selecting reverse drive I, S for selecting reverse drive II
d. Form and output each control signal of Se for selecting the normal rotation correction drive.

Reference numeral 220 denotes a hand movement reference signal forming circuit.
It is configured as shown in the figure, and forms and outputs a hand movement reference clock Cdrv according to a command from software.

In FIG. 4, reference numeral 2201 denotes a 3-bit register, which stores data for determining the frequency of the hand movement reference clock Cdrv in accordance with an instruction from software (an output signal of the address decoder 2202). Reference numeral 2203 denotes a 3-bit register which captures and stores the data stored in the register 2201 at the falling edge of the hand movement reference clock Cdrv output from the programmable dividing period 2205. Reference numeral 2204 denotes a decoder, which corresponds to the data stored in the register 2203, and
The numbers 3, 4, 5, 6, 8, 10, 16 are output in binary form. 2205 is a programmable frequency divider, a first frequency divider
The 256 Hz signal φ ₂₅₆ output from 208 is frequency-divided to 1 / n and output, where n is the numerical value output from decoder 2204. Therefore, the hand movement reference signal forming circuit 220 changes the frequency of the hand movement reference clock Cdrv to 128 Hz, 85.3 Hz, 64 Hz, 51.2 Hz, 42.7 Hz, 32 Hz, and 25.
You can select from 8 types of 6Hz and 16Hz. Also,
To change the frequency of the hand operation reference clock Cdrv, refer to register 2203.
This is done when data is loaded into register 22.
Since the data import to 03 is performed in synchronization with the hand movement reference clock Cdrv, from the previous frequency fa to the next frequency fb
When switching to, an interval of 1 / fa is always ensured.

When the forward rotation drive I and the reverse rotation drive are performed in combination, the frequency of the hand movement reference clock Cdrv is limited to 64 Hz or less.

Reference numeral 221 denotes a first drive pulse forming circuit which forms and outputs a drive pulse Pa for the forward rotation drive I shown in FIG.

Reference numeral 222 denotes a second drive pulse forming circuit which forms and outputs the drive pulse Pb for the forward drive II shown in FIG.

Reference numeral 223 denotes a third drive pulse forming circuit which forms and outputs the drive pulse Pc for the reverse rotation drive I shown in FIG.

A fourth drive pulse forming circuit 224 forms and outputs a drive pulse Pd for the reverse rotation drive II shown in FIG.

Reference numeral 225 denotes a fifth driving pulse forming circuit, which is a group of correction driving pulses Pe (a normal driving pulse P ₁ , a correction driving pulse P ₂ , and an AC magnetic field detection pulse P ₃ disclosed in JP-A-60-260883). , And forms and outputs an AC magnetic field detection pulse SP ₁ and a rotation detection pulse SP ₂ ).

Reference numerals 226, 227, 228, and 229 denote motor clock control circuits, which are specifically configured as shown in FIG. 9, and each of which has a stepping motor pulse number of a stepping motor A, a stepping motor B, a stepping motor C, and a stepping motor D. Is controlled by a command from software.

In FIG. 9, reference numeral 2261 denotes a 4-bit register that stores the number of hand movement pulses instructed by software. twenty two
Reference numeral 62 denotes a 4-bit up counter which counts a hand driving reference clock Cdrv passing through an AND gate 2274 and outputs a control signal
Reset by Sreset. Reference numeral 2263 denotes a match detection circuit which compares the contents of the register 2261 and the contents of the up counter 2262 and outputs a match signal Dy when they match. 2264 is an all 1 detection circuit, the contents of the register 2261 outputs the all-1 detection signal D ₁₅ when all ones. 2265 is a trigger signal generation circuit for forming a motor drive pulse, and a NOT gate 2266
And 2267, 3-input AND gate 2268, 2-input AND gate 2
269, a two-input OR gate 2270. When all 1 (15) is set in the register 2261, the motor pulse is continuously output until other data is set.
When data other than all 1 is set, a motor pulse is output for that data, and the motor pulse output is stopped until the next data is set. Reference numeral 2271 denotes a bidirectional switch, which is turned on when the control signal Sread is output, and puts data of the up counter 2262 on the data bus. Reference numeral 2272 denotes a control signal forming circuit, which resets the signal Sset for setting the number of hand movement pulses in the register 2261, the signal Sread for reading data of the up counter 2262, the register 2261 and the up counter 2262 according to a command from software. And output the signal Sreset. When the signal Sread is output, N
The passage of the hand movement reference clock Cdrv is prohibited by the OT gate 2273 and the AND gate 2274. In this case, after reading, the signal Sreset is generated and the register 2261 and the up counter
2262 needs to be reset. The match detection circuit 22
When 63 matches (when the set number of pulses has been output), each motor starts motor control interrupt (Min
t) occurs. When a motor control interrupt occurs, it is possible to read which interrupt has occurred by software, and to reset after the reading.

230, 231, 232, and 233 are trigger forming circuits that are output from the motor clock control circuit in accordance with the hand movement control signals Sa, Sb, Sc, Sd, and Se output from the motor hand movement control circuit 219. Trigger signal Tr 221, 222, 223, 2
24, 225 each drive pulse control circuit is motor drive pulse P
a, trigger signal Sat for forming Pb, Pc, Pd, Pe,
Pass as Sbt, Sct, Sdt, Set. 234, 235, 23
6, 237 are motor drive pulse selection circuits, corresponding to the hand movement control signals Sa, Sb, Sc, Sd, Se, and motor drive pulses Pa, Pb, Pc, P output from each drive pulse forming circuit.
Select and output the drive pulse required for each step motor from d and Pe. This is the end of the description of FIG.

Reference numerals 213, 214, 215, and 216 denote motor drivers, which alternately output motor drive pulses output from a motor drive pulse selection circuit to two output terminals of each motor drive circuit, and drive each step motor. .

217 is an input control and reset circuit, and A, B,
Processing of each switch input of C, D, RA1, RA2, RB1, RB2 and processing of input terminals of K, T, R are performed. A, B,
When any one of C and D or any one of RA1, RA2, RB1, and RB2 switches is input, a switch interrupt SWint is generated. At this time, reading and resetting of the interrupt factor are performed by software. Each input terminal is _pulled down to Vss, and becomes data 1 in the open state and data 1 in the state of being connected to _VDD .

The K terminal is a specification switching terminal, and two types of specifications can be selected according to the data of the K terminal. The reading of the data at the K terminal is performed by software.

The R terminal is the system reset terminal, and the R terminal is V _DD
, The core CPU, frequency divider, and other peripheral circuits are forcibly set to the initial state by the hardware.

T terminal is a test mode conversion terminal, RA2 terminal is V _DD
By inputting a clock to the T terminal in a state where the test circuit is connected to, the 16 test modes for testing the peripheral circuits can be switched. The main test mode is forward rotation I
Confirmation mode, forward rotation II confirmation mode, reverse rotation I confirmation mode, reverse rotation II confirmation mode, correction drive confirmation mode, chronograph 1 /
It has a 100-second confirmation mode and the like. In these confirmation modes, a motor drive pulse is automatically output to each motor drive pulse output terminal.

The system reset can be performed by simultaneous input of the switch as well as by connecting the R terminal to V _DD.
In the case where there is simultaneous input of one of A and C and B and RA2, and one of A, B and C and RA2 and R2
The system is configured so that the system is forcibly reset by hardware when there is a simultaneous input of B2.

The reset function that can be processed by software includes a frequency divider circuit reset and a peripheral circuit reset. When the peripheral circuit reset is performed, the frequency divider circuit is also reset.

Reference numeral 218 denotes an interrupt control circuit, which performs prioritization of each of the interrupts, switch storage, chronograph interrupt, and motor control interrupt, storage until the reading is performed, and reset processing after the reading.

Reference numeral 200 denotes a constant voltage circuit which forms a low constant voltage of about 1.2 V from a battery voltage (about 1.58 V) applied between V _{DD and} V _SS and outputs it to the VS1 terminal.

 This is the end of the description of FIG.

As described in detail above, the CMOS-IC 20 has the following features regarding the driving of the step motor, and is extremely excellent as a multi-hand type multi-function analog electronic timepiece IC.

It has motor drivers 213, 214, 215, 216, and 4
Step motors can be driven simultaneously.

Hand movement control system control circuit 219 and drive pulse forming circuit 221-
225 and motor drive pulse selection circuits 234 to 237, and the four step motors can be driven by software to perform three types of forward drive and two types of reverse drive, respectively.

It has a hand movement reference signal forming circuit 220, and the hand movement speed of each step motor can be freely changed by software.

It has motor clock forming circuits 226 to 229 corresponding to each of the four step motors, and the number of hand movement pulses of each step motor can be freely set by software.

Next, a plan view of an embodiment of the multifunction analog electronic timepiece of the present invention is shown in FIG. 10 and will be described. In this embodiment, multi-functionalization is realized by using four step motors. Below,
FIG. 10 will be described.

Reference numeral 1 denotes a ground plate formed of resin, and reference numeral 2 denotes a battery. 3 is a step motor A for displaying a normal time.
A magnetic core 3a made of a highly permeable material, a coil wound around the magnetic core 3a, a coil block 3b made of a coil frame and a coil lead board and a coil frame that is terminated at both ends in a conductive manner, a stator 3c made of a highly permeable material, Rotor 4 consisting of rotor magnet and kana
It consists of. Reference numerals 5, 6, 7, and 8 are a fifth wheel, a fourth wheel, a third wheel, and a second wheel, respectively, 9 is a minute wheel, and 10 is an hour wheel. The second wheel and the hour wheel are arranged at the center position of the watch body. With these wheel train configurations,
Minute display and hour display of the normal time are performed at the center position of the clock body. FIG. 11 is a cross-sectional view showing an engaged state of the train wheel for displaying the normal time and hour. As shown in the figure, the rotor pinion 4a meshes with the fifth wheel & pinion 5a, and the fifth pinion 5b meshes with the fourth pinion gear 6a. The fourth pinion 6b meshes with the third gear 7a, and the third pinion 7b meshes with the second gear 8a. The reduction ratio from this rotor pinion 4b to the second gear 8a is 1/1800. When the rotor 4 rotates half a second, the second wheel rotates one revolution every 3600 seconds, that is, 60 minutes. Can be displayed. Reference numeral 11 denotes a minute hand engaged with the end of the second wheel & pinion 8 for displaying minutes. Also, second kana 8b
Meshes with the minute wheel 9a, and the minute pinion 9b meshes with the hour wheel 10. The reduction ratio from the second kana 8b to the hour wheel 10 is 1 /
It is 12 and the hour can be displayed at normal time. Reference numeral 12 denotes an hour hand engaged with the end of the hour wheel 10 for displaying the hour. In FIG. 10, reference numeral 13 denotes a small seconds wheel arranged on the 9 o'clock direction axis of the timepiece. Seconds of the normal time are displayed on the time axis. FIG. 12 is a cross-sectional view showing the engaged state of the train wheel for displaying the normal time and seconds. As shown in the figure, the fifth pinion 5b is engaged with the small second gear 13a. Small seconds gear 13 from rotor kana 4a
Speed reduction ratio is 1/30, and rotor 4
By rotating by 180 °, the small seconds wheel 13 rotates one rotation every 60 seconds, that is, 6 ° per second, so that the seconds can be displayed at the normal time. Reference numeral 14 denotes a small second hand engaged with the tip of the small second wheel 13 for displaying seconds. The drive of the step motor A detects the magnitude of the induced voltage generated by the free vibration of the rotor 4 after the application of the drive pulse, determines rotation or non-rotation, and immediately determines the non-rotation when the correction pulse is generated. Applied to ensure that the rotor is rotating. The detection of the rotation of the rotor is described in detail in JP-A-60-260833. By detecting the rotation of the rotor, the drive pulse can be narrowed, and the power consumption of the step motor A which is always driven at 1 Hz can be reduced.

In FIG. 10, reference numeral 15 denotes a step motor B for displaying a chronograph second hand, and a magnetic core 15a made of a highly permeable material.
A coil wound around the magnetic core 15a, a coil lead board in which both ends thereof are electrically conductively terminated, a coil block 15b formed of a coil frame, a stator 15c formed of a highly permeable material, and a rotor 16 formed of a rotor magnet and a rotor pinion. I have. Also, 17, 18 and 19 are 1/5 second CG first intermediate car, 1/5 second CG respectively
The second intermediate car is a 1/5 second CG car, and the 1/5 second CG car is located at the center position of the clock body. With these wheel train configurations, the chronograph seconds are displayed at the center position of the watch body. FIG. 13 is a sectional view showing an engaged state of a wheel train for displaying the chronograph seconds. As shown in the figure, the rotor pinion 16a meshes with the 1/5 second CG first intermediate gear 17a, and the 1/5 second CG deintermediate pinion 17b engages with the 1/5 second CG second intermediate gear 18a.
I'm engaged. Also, 1/5 second CG second intermediate kana 18b is 1 /
Meshing with 5 second CG gear 19a. The reduction ratio from this rotor pinion 16a to the 1/5 second CG gear 19a is 1/150.

The rotor 16 rotates 180 ° in 1/5 second by an electric signal from the CMOS-IC 20. For this reason, 1/5 second CG car 19 takes 1/5 second
1.2 °, that is, 1.2 ° × 5 steps per second, and chronograph seconds can be displayed in 1/5 second steps. 1/5 second CG car 1
The 9 rotates 60 seconds per lap in 360 ゜ /1.2 ゜ = 300 steps, enabling 1/5 second display on the chronograph. G needle. The 1/5 second CG hand 21 also functions as a timer set hand for setting the timer time. This timer operation will be described later. Since the step motor B is driven at 5 Hz during the chronograph operation, the power consumption is large. However, by detecting the rotation of the rotor, the width of the drive pulse can be narrowed, and the power consumption is reduced to about 1/2 compared to the conventional chronograph.

FIG. 17 is an external view of a completed multifunctional electronic timepiece of the present embodiment. The hands driven by the step motor A are the small second hand 14, the minute hand 11 and the hour hand 12, and the hands driven by the step motor B are the 1/5 second CG hand 21. Minute hand 11,
The hour hand 12 and the 1/5 second CG hand 21 are large in size and large in both weight and unbalance amount, and the load on the rotor due to impact increases. Therefore, the rotor may not rotate with a narrow drive pulse, albeit accidentally. In order to compensate for such a drawback, the step motors A and B detect the rotation of the rotor, and output a correction pulse immediately when the rotation becomes non-rotating to ensure reliable rotation.

Reference numeral 27 denotes a motor C for displaying the minute of the chronograph and the display of the timer time and second, and a magnetic core 27a made of a highly permeable material.
It is composed of a coil block 27b composed of a coil lead board and a coil frame in which both ends of a coil wound around a magnetic core 27a are conductively connected and a coil frame, a stator 27c composed of a highly permeable material, and a rotor 28 composed of a rotor magnet and a rotor pinion. ing. 29 and 30 are a minute CG intermediate wheel and a minute CG wheel, respectively.
The minute CG wheel 30 is disposed on a 12 o'clock axis of the clock body.
With these wheel train configurations, the minute display of the chronograph and the second display of the timer elapsed time are performed on the 12 o'clock axis of the watch body. FIG. 14 is a cross-sectional view showing the engaged state of the train wheel for displaying the chronograph minute and the timer elapsed time second. As shown in the figure, rotor kana 28a is a minute CG
Intermeshing with the intermediate gear 29a, the minute CG middle kana 29b is the minute CG gear 30
is engaged with a. From this rotor kana 28a to minute CG gear 30
The reduction ratio up to a is 1/30. In the chronograph mode, an electric signal from the CMOS-IC 20
Rotates at a rate of 360 ° per minute, ie, 180 ° × 2 steps every 30 seconds. Therefore, the minute CG car is 12 ゜ per minute or 30
It rotates 360 ゜ (12 ゜ x 30 steps) per minute, and chronograph minutes can be displayed for 30 minutes. Reference numeral 31 denotes a minute CG hand fitted to the end of the minute CG vehicle for displaying a chronograph minute.
By the combination of the minute CG hand 31 and the above-described 1/5 second CG hand 21, a chronograph display with a minimum reading unit of 1/5 second and a maximum measurement of 30 minutes is possible. Next, in the case of the timer mode, the electric signal from the CMOS-IC 20 causes the rotor 28 to rotate in the opposite direction to that in the chronograph mode and to rotate in the opposite direction to that in the chronograph mode. This rotation is 180 ° × 1 step per second, and the minute CG hand 31 rotates counterclockwise at intervals of one second, and displays a timer elapsed time of one second of 60 seconds. At this time, the rotor 16 is rotated by 180 ° × 5 steps per minute in a direction opposite to that in the chronograph mode by an electric signal from the CMOS-IC 20. Therefore 1/5 second CG
The hand 21 rotates counterclockwise at a rate of 6 ° for one minute, and displays the elapsed time of the timer. In addition, the timer time is set, and in the state where the second winding stem 23 of FIG. 10 is in the first stage, each time the B switch 25 is pressed once, the rotor 16 becomes 180 ° ×
Rotate 5 steps, 1/5 second CG hand 21 is 6mm unit (1 on scale)
Rotate in minutes) and display the timer setting time up to 60 minutes.

FIG. 32 shows a step motor D for displaying an alarm setting time, a magnetic core 32a made of a high magnetic permeability material, a coil wound around the magnetic core 32a, and a coil lead board and a coil whose both ends are conductively terminated. Coil block 32 consisting of a frame
b, a stator 32c made of a highly permeable material, and a rotor 33 made up of a rotor magnet and a rotor pinion. Also, 3
Reference numerals 4, 35, 36, and 37 denote an AL intermediate wheel, an AL minute wheel, an AL minute wheel, and an AL hour wheel, respectively.
It is arranged on the axis in the time direction. With these wheel train configurations, the alarm set time is displayed on the 6 o'clock axis of the watch body. FIG. 15 is a cross-sectional view showing an engaged state of the wheel train for displaying the alarm set time. As shown in the figure, the rotor pinion 33a is engaged with the AL intermediate gear 34a, and the AL intermediate pin 34b is engaged with the AL minute gear 35a. Also, AL minute kana 35b meshes with AL minute back gear 36a, and AL minute minute 36
b is engaged with the AL hour wheel 37. The reduction ratio from the rotor kana 33a to the AL minute gear 35a is 1/30, and
The reduction ratio up to the hour wheel 37 is 1/12. 38 is AL
AL minute hand fitted to the end of minute wheel 35, 39 is AL hour wheel 37
AL hour hand fitted to the tip.

When the second winding stem 23 is in the first stage, an alarm set mode is set, and each time the C switch 26 is pressed once, the rotor 33 is rotated by 180 ° by an electric signal from the CMOS-IC 20. Therefore, AL
The minute hand rotates 6 ° (1 minute on the scale) and the AL clock rotates 0.5 °.
As a result, the alarm time can be set in units of one minute up to a maximum of 12 hours. Also, at this time, if the C switch 26 is kept pressed, the AL minute hand 38 and the AL hour hand 39 move continuously at an accelerated speed, and a maximum of 12
It is fast-forwarded at 8Hz, and the alarm time can be set in a short time. The driving pulse of the step motor at this time is
As shown in FIG. 23A, the pulse width is 4.39 msec, the pulse interval is 7.81 msec, and the next half-turn pulse is output.

After that, when the set alarm time and the normal time match, an alarm sounds. When the second volume 23 is at the 0th stage, the alarm is turned off and the AL minute hand 38 and the AL hour hand are set.
39 displays the normal time. At this time, the step motor D
Then, a drive pulse having a pulse width of 4.39 msec and 128 Hz is applied, and the time is switched to the normal time in a short time. After switching to the normal time, the rotor 33 rotates in 180 ° steps every minute by an electric signal from the CMOS-IC 20. Therefore, the AL minute hand 38 moves one minute. As shown in FIG. 5, as the drive pulse of the step motor D at the time of one-minute hand movement, a pulse of 6.84 msec is output, and after that, five pulses of 0.24 msec in width are output after a period of 0.73 msec. This pulse is a pulse that is set so that the rotor can rotate sufficiently against the accidental shock when carrying the watch and the load on the rotor accompanying the increase in the viscous resistance of the lubricating oil in a low-temperature environment. Therefore, it is possible to reliably display the normal time.

FIG. 23 (b) shows an embodiment of a drive pulse applied to a step motor for operating the 1/100 second hand. The driving pulse has a width of 3.91 msec and is output at 100 Hz. 23rd
The pulse width is narrower than the fast-forward pulse shown in FIG. This is because when the magnetomotive force of the coil of the step motor is large, or when the magnet of the rotor is downsized, the rotation of the rotor is fast, and stable operation can be obtained with a narrow pulse. When the magnetomotive force of the coil of the step motor D is increased or the rotor magnet is reduced in size, the width of the drive pulse may be set to 3.91 mesc or less. In this case, the pulse width needs to be narrow, so 128Hz
The above fast-forward is also possible.

FIG. 24 is a schematic view of a wheel train group driven by the step motor A as viewed from the dial side, and the arrows in the figure indicate the rotation direction of each wheel train. The rotation of the rotor 4 is transmitted to the fifth wheel & pinion 5 and further transmitted to the small second wheel 13 and the second is indicated by the small second hand. The fifth wheel 5 is transmitted to the second wheel 8 via the fourth wheel 6 and the third wheel 7, and the minute hand 11 indicates the minute. Further, it is transmitted from the center wheel & pinion 8 to the minute wheel 9 and the hour wheel 10, and the hour is indicated by the hour hand 12. As described above, the time display by the hand operation of the step motor A is performed by the odd numbered train train, with the second display being the third, the minute display being the fifth, and the hour display being the seventh from the rotor 4.

Fig. 25 shows a step motor B for displaying chronograph seconds.
And its wheel train group. First, the rotation of the rotor 16 is transmitted to the 1/5 second CG first intermediate wheel 17 and further transmitted to the 1/5 second CG second intermediate wheel by the 1/5 second CG hand 21 engaged with the 1/5 second CG vehicle. Chronograph 1/5 second display is performed. As described above, the chronograph display by the step motor B is performed in the fourth and even-numbered wheel trains counted from the rotor 16, so that the step motor A cannot be used as it is. However, it is sufficient to rotate the rotor 16 in the opposite direction to the rotor 4 of the step motor A. For this purpose, the internal notches 3d and 3e opposed to the center of the rotor 4 of the stator A3c in FIG. 24 may be set to the positions where the internal notches 3d and 3e are rotated by 90 °, that is, the positions shown in FIG. . The stators A and B have exactly the same outer shape and can be processed in the same process in manufacturing, and can be easily processed only by changing the position of the inner notch. Further, since the same coil blocks 3b and 15b are used, not only component processing but also assembly is simplified.

FIG. 26 shows a step motor D for displaying alarm time and a wheel train group. The rotation of the rotor 33 is transmitted to the AL minute wheel 35 via the AL intermediate wheel 34, and an alarm minute is displayed by the AL minute hand 38 engaged with the AL minute wheel 35. The rotation of the AL minute wheel 35 is transmitted to the AL minute wheel 36, and further transmitted to the AL hour wheel 37.
The alarm hour is indicated by the AL hour hand 39 engaged with the alarm. As described above, the alarm time display of the step motor D is performed by the minute display at the third position from the rotor 33, the hour display at the fifth position, and the odd-numbered wheel train. Therefore, the inner notches 33d and 33e of the stator D32c are the same as those shown in FIG.
It is in the same position as A3c. The step motor C for displaying the chronograph display is exactly the same as the step motor D, and has the same gear shape as the gear wheel of the wheel train.

Next, differences between the two types of step motors, that is, the step motor A or the step motor B and the step motor C or the step motor D will be described. Step motor A is driven at 1 Hz, step motor B is 5 Hz when the chronograph function is activated.
Drive and the step motor C and the step motor D are 1 /
60 Hz drive, that is, one minute hand movement. Therefore, the power consumed by the step motor A and the step motor B increases. In order to minimize the power consumption, the rotation of the rotor is detected by detecting the magnitude of the induced voltage generated by the free vibration of the rotor after the application of the driving pulse.
It is generally known that the generated induced voltage increases in proportion to the number of turns of the coil. Therefore, the coil blocks used in the step motor A and the step motor B are wound with as many coil wires as possible. It is conceivable to make the coil wire thinner and increase the number of windings, but the thinner wire not only increases the resistance value per unit length and the loss of Joule heat, but also breaks the wire for parts processing. It is not advisable to create a problem and make the coil wire thinner. In such a step motor for detecting the rotation of the rotor, the coil needs to be as large as possible. still,
The detection of the rotation of the rotor is described in detail in JP-A-60-260883.

On the other hand, step motor C and step motor D
Since a drive pulse is applied once every 60 seconds, the power consumption of the entire multifunction electronic timepiece is small. Therefore, it is more advantageous to set a simple drive pulse in consideration of the load applied to the rotor than to detect the rotation of the rotor that requires a complicated circuit configuration and a coil block that occupies a large space. Loads applied to the rotor include impacts at the time of a drop and an increase in the viscous resistance of lubricating oil at low temperatures.However, in order to reliably rotate the rotor against this load, the drive pulse under no load condition It is sufficient to make the pulse width about 2 to 5 times as compared with the above. Also, Japanese Patent Application Laid-Open
The correction pulse P ₂ may be set as a drive pulse in 260,833. In this embodiment, the width of the driving pulse of the step motor A and the step motor B is 2.44 msec, and the width of the step motor C is 4.39 msec. The step motor D has set the correction pulse P ₂ as the driving pulse. In such a step motor having a small output of the drive pulse, the drive circuit is also simplified by simplifying the drive method of the rotor,
Since the coil block can also be reduced in size, the plane size occupied by the step motor can be small. Therefore, the two step motors C and D can be reduced in size, and the overall movement can be reduced in size.

When the chronograph function of the step motor C is activated and when the normal time of the step motor D is displayed, both the hands move by one minute. Very few compared to.
Therefore, if one kind of drive pulse is set in advance so as to allow sufficient rotation for the load of the rotor, the configuration of the drive circuit does not become complicated. As shown in FIG. 17, the hands driven by the step motor C are the minute CG hand 31, and the hands driven by the step motor D are the AL minute hand 38 and the AL hour hand 39. These guidelines are all small and relatively small in weight and unbalance.
Therefore, the load on the rotor at the time of impact is reduced as compared with the hour / minute hand and the 1/5 second CG hand. Therefore, it is sufficient that the drive pulses of the step motors C and D have a width of 2 to 5 times the pulse width when the rotor is rotating under no load. The correction pulse P ₂ which is described in JP-60-260833 may be used as the driving pulse. In order to drive the step motor with one kind of pulse fixed in this way, it is necessary to set the pulse width to 2 to 5 times that at the time of no load. High power consumption. Therefore, for driving at 1/10 Hz or more, the pulse width is narrowed by detecting the rotation of the rotor, and the power consumption can be reduced. When driving at a frequency lower than 1/10 Hz, it is more effective to drive with a fixed pulse because the circuit configuration becomes less complicated and the MOS-IC chip becomes smaller. As described above, the power consumption of the step motor can be reduced by the present invention, and the thickness of the movement can be reduced by 10% by using a button type battery which is thinner than the conventional one.

FIG. 16 shows a circuit connection diagram of the CMOS-IC 20 and other electric elements. In FIG. 16, 2 is a silver oxide battery (SR927W),
3b is a step motor A coil block, 15b is a step motor B coil block, 24 is an A switch, 25 is B
Switch, 26 is a C switch, 27b is a coil block of a step motor C, 32b is a coil block of a step motor D, 55 and 56 are elements for driving a buzzer, 55 is a step-up coil, 56 is a mini-mold transistor with a protection diode. , 57 is a 0.1μF chip capacitor to suppress voltage fluctuation of the constant voltage circuit built in CMOS-IC20, 58 is C
A micro-tuning fork type crystal resonator serving as a source oscillation of an oscillation circuit built in the MOS-IC 20, 46a is a switch formed in a part of the bolt 46, 59a is a switch formed in a part of the second mandrel 59, 64 Although not shown in FIG. 10, a piezoelectric buzzer is attached to the back cover of the watch case.
The switches 24, 25 and 26 are push button type switches, and can be input only at the time of pushing. The switch 46a is a switch linked to the first winding stem 22, and is configured to close the RA1 terminal at the first stage of the first winding stem 22, close the RA2 terminal at the second stage, and open at the normal position. . The switch 59a is a switch linked to the second winding stem 23. The first winding of the second winding stem 23 closes the RB1 terminal at the first stage, closes the RB2 terminal at the second stage, and opens at the normal position. I have.

FIG. 17 is an external view of a completed multifunctional electronic timepiece of the present embodiment. The specifications and operation method of the present embodiment will be briefly described based on the flowcharts of FIGS. 17 and 18 to 22.

In FIG. 17, reference numeral 40 denotes an outer case, and reference numeral 41 denotes a dial. Also, on the dial, 42 is a normal second time display section, 43 is a chronograph minute display and a timer elapsed time second display section, 44
Is an alarm set time display section.

First, the normal time is displayed by the small second hand 14, the minute hand 11, and the hour hand 12 which move every second as described above. The time can be adjusted by pulling out the first winding stem 22 to the second stage. At this time, the fourth wheel & pinion 6 is trained by the train wheel 45 and the train wheel setting lever 47 which is engaged with the latch 46 shown in FIG. 10, the rotor 4 stops, and the movement of the small second hand stops. If the first winding stem 22 is rotated in this state, the turning force is transmitted to the minute wheel 9 through the pinwheel 48 and the small iron wheel 50. Here, since the second wheel 8a has a certain sliding torque and is connected to the second pinion 8b, even if the fourth wheel 6 is regulated, the small iron wheel 50, the minute wheel 9, and the second pinion 8b, the hour wheel 10 rotates. Therefore, the minute hand 1,
The hour hand 12 rotates and can be set to an arbitrary time.

FIG. 18 shows a flowchart for displaying the normal time. As shown in FIG. 18, when a 1 Hz interrupt is input, it is read whether or not the switch RA2 is off, and R
If A2 is off, the motor hand operation control circuit 21
The forward rotation correction drive of the step motor A is set to 9 and the number of movements 1 is set to the motor clock control circuit A226. When the switch RA2 is ON (time correction state), the motor drive is stopped, and the frequency divider circuits 208 and 209 are instantaneously reset so that the motor is driven one second after RA2 is turned off.

FIG. 19 shows a flowchart of the chronograph function.
Note that “CG” used in FIG. 25 is an abbreviation for chronograph. "CG start" indicates that the chronograph is being measured and the split display is released. When the second volume 23 is in the normal position (when both RB1 and RB2 are off), the chronograph mode is set, and the start and stop of chronograph measurement are repeated each time the A switch is input. When the chronograph measurement is started, the CG 1/5 second counter formed in a part of the data memory 204 by the CG interrupt is incremented by 1, and the 1/5 second CG second 21 is moved in 1/5 second increments, 1 /
When the 5-second counter counts 1 minute, the CG minute counter formed in a part of the data memory 204 is also incremented by 1 and the minute C
The G hand 31 is moved every minute. Also, "CG start"
When the B switch is input at this time, the split display state is displayed. When the B switch is input in the split display state, "CG
"Start", the 1/5 second CG hand 21 and minute CG hand 31 are fast-forwarded until the measurement time is displayed. When the B switch is pressed while the chronograph measurement is stopped, the chronograph measurement is reset and each CG hand is reset. It is fast-forwarded until the θ position is displayed, and the method of fast-forward hand movement is shown in the flowchart of FIG.

FIG. 20 shows a flowchart of the timer function. The timer setting time is displayed by the 1/5 second CG hand 21. When the second volume 23 is in the first stage (when RB1 is on), the timer mode is set. When the B switch is pressed while the timer is set, the timer set time increases by 1 minute, and the 1/5 second CG hand 2
1 moves the hand by one minute (5 steps). This 1/5 second CG
The scale on the dial 41 indicated by the hand 21 indicates the timer setting time, and setting up to a maximum of 60 minutes is possible. The start / stop of the timer is performed by the A switch 24. When the timer starts, the minute CG hand 31 moves counterclockwise every 1 second, 1/5 second C
The G hand 21 moves counterclockwise every minute and displays the timer elapsed time. Also, when the timer is set for 1 minute and at the last minute, the minute CG hand 31 stops, the 1/5 second CG hand 21 performs subtraction every 1 second, and a beep sounds three seconds before the last minute. , When the time reaches 0 seconds, a time-up sound is emitted and the timer operation ends.

FIG. 21 shows a flowchart of the alarm function. The alarm setting time is displayed in 44 parts on the dial. Volume 2 true
Each time the C switch 26 is pressed in the state where the 23 is in the first stage, the AL minute hand 38 and the AL hour hand 39 move in units of one minute, and the alarm time can be set up to 12 hours. At this time, if the C switch 26 is kept depressed, the AL minute hand 38 and the AL hour hand 39 run continuously at an accelerated speed, and the alarm time can be set in a short time. When the set alarm time matches the normal time, the alarm sounds. When the second winding stem 23 is at the 0th stage, both the alarm and the timer are in the non-operation mode, and the AL minute hand 38 and the AL hour hand 39 display the normal time. The correction of the normal time is performed through the AL wheelwheel 49 and the small iron wheel 51 shown in FIG. 10 by rotating the second winding stem in the second stage.

FIG. 22 shows a flowchart of the hand movement method of each motor. FIG. 22 (a) shows a motor driving method when the number of hand movements is 14 or less, and FIGS. 22 (b) and (c) show a motor driving method for fast-forwarding (128 Hz) of 15 or more shots. The "motor pulse register" used in the figure is the register in FIG.
It is 2261.

Although the present invention has been described centering on the chronograph as the software content for operating the CPU, as shown in FIG.
It is also possible to use world time indicating the time of each city in the world. Minute hand 70, hour hand 71, small second hand 72
World time minute hand 74, hour hand 75, indicating world time
It is composed of a city selection hand 73 indicating a city name. The city selection hand 73 has the same configuration as that of the 1/5 second CG display at the time of the chronograph function described above, and the number of divisions in one round is 300 steps. The city name display is 30 ゜ divided 12
This is performed at 79 places and 12 places 80 between the display units. in this way,
Step motor B so that 300 divisions can be displayed in 24 divisions
Is driven. A crown 78 corrects the minute hand 70 and the hour hand 71 for displaying the basic clock.

Next, the operation method will be described. When the small second hand 72 reaches the 0 position, the crown 78 is pulled out two steps and stopped. Turn the crown to set the home time minute hand to the current time. Next, the city selection hand 73 is set to the city name corresponding to the home time by using the buttons 76 and 77. For example, Tokyo (TOKYO). At this time, the correction direction of the city selection hand 73 is rotated clockwise with the button 76 and counterclockwise with the button 77. Pull the crown 78 to the first step and adjust the world time using the buttons 76 and 77. The minute hand 74 is configured to advance one minute by one push of the buttons 76 and 77. It is also an electronic correction system that is self-propelled while holding down. Further, the correction is made clockwise by the button 76 and counterclockwise by the button 77.

 This is the end of the description of the embodiment.

〔The invention's effect〕

As described above in detail with the embodiments, according to the present invention, an analog electronic timepiece IC and an analog electronic timepiece of various specifications can be provided depending on the software stored in the program memory. The software development period is the same as that of the random logic IC that realizes the same function.
With 1/2 to 1/3, IC development time can be greatly reduced.

In addition, even if specification changes or function additions occur during development, it can be easily handled by changing the software. In particular, the present invention has a plurality of stepping motors for hand movement, and easily realizes multifunctional driving in which each of the stepping motors is driven by each drive control signal. In this case, in the present invention, in particular, the core CPC outputs a drive control signal specific to each of the plurality of step motors from the motor hand operation control circuit to the motor driver circuit based on a software command. The drive control signal unique to each of the plurality of step motors is, for example, control of the number of hand movement pulses of each step motor, selection of the frequency of the hand movement reference clock, and selection of the drive pulse waveform of each step motor. However, the form of drive control required for each of the plurality of step motors is extremely complicated and diverse as a whole. In the present invention, the core CPU,
By using a program memory for storing software, a motor operation control circuit, and a motor driver circuit, it is possible to control the drive of a plurality of complicated and diverse step motors. According to the present invention, the motor hand movement control circuit described above constitutes a functional unit that generates each hand movement control signal required for each of the plurality of step motors, and the above-described software functions as a command unit, and the motor hand movement control is performed. The circuit operates to generate a drive control signal for each of the step motors. Therefore, a plurality of step motors are provided, and each drive control required for each step motor can be easily and reliably realized. In addition, since the entirety of the plurality of step motors is controlled collectively, optimal drive control can be realized, and the reduction in the power consumption of the step motors allows the movement to be smaller and thinner, thereby diversifying. An analog electronic clock IC and an analog electronic clock that satisfy consumer needs can be provided in a short period of time. In addition, the present invention comprises a core CUP, a so-called command section of a program memory for storing software, and a so-called functional section of a motor operation control circuit for generating drive control signals for each of a plurality of step motors. Therefore, as can be considered when a core CPU and a program memory in which the command unit and the function unit are integrated are configured as described above, the software of the core CPU and the entire program memory is heavy, and the running duty is large and the operation is large. The control of the step motor can be performed quickly without delay, and fast control is possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an analog electronic timepiece IC according to the present invention. FIG. 2 is a block diagram showing a specific configuration example of the chronograph circuit 211 of FIG. FIG. 3 is a block diagram showing a specific configuration example of the motor hand movement control circuit 212 in FIG. FIG. 4 is a diagram showing a specific configuration example of a hand movement reference signal forming circuit 220 of FIG. FIGS. 5, 6, 7, and 8 show the first drive pulse forming circuit 221 and the second drive pulse forming circuit 22 of FIG. 1, respectively.
2. Motor drive pulses Pa, Pb, Pc, Pd output from the third drive pulse forming circuit 223 and the fourth drive pulse forming circuit 224
Timing chart. FIG. 9 shows the motor clock control circuits 226, 227 and 22 of FIG.
FIG. 8 is a block diagram showing a specific configuration example of 8 and 229. FIG. 10 is a plan view showing an embodiment of the analog electronic timepiece of the present invention. FIG. 11 is a cross-sectional view of an example of a wheel for displaying normal time and hour. FIG. 12 is a cross-sectional view of a normal time / second display wheel train. FIG. 13 is a cross-sectional view of a chronograph second display wheel train. FIG. 14 is a cross-sectional view of a wheel train for chronograph minute display and timer second display. FIG. 15 is a cross-sectional view of the wheel train for displaying the alarm setting time. FIG. 16 is a circuit connection diagram of the embodiment of FIG. FIG. 17 is an external view of a completed multifunctional electronic timepiece of the present embodiment. 18 (a) and 18 (b) are flowcharts for displaying a normal time. FIGS. 19 (a) and (b) are flowcharts of the chronograph function. 20 (a) and (b) are flowcharts of the timer function. 21 (a) to (c) are flowcharts of the alarm function. 22 (a) to 22 (c) are flowcharts of a motor driving method. FIGS. 23 (a) and (b) are timing charts of a fast-forward drive pulse. FIG. 24 is a schematic plan view of a wheel train for normal time display and a step motor. FIG. 25 is a schematic plan view of a chronograph second display wheel train and a step motor. FIG. 26 is a schematic plan view of an alarm set time display wheel train and a step motor. FIG. 27 is a plan view of a timepiece according to an embodiment of the present invention. 2 Battery 3 Step motor A 4 Rotor 5 5th car 6 4th car 7 3rd car 8 2nd car 9 9 15 Step motor B 16 Rotor 17 1/5 second CG first intermediate wheel 18 1/5 second CG second intermediate wheel 19 1/5 second CG vehicle 20 CMOS-IC 27 … Step motor C 28… Rotor 29… Minute CG intermediate wheel 30… Minute CG wheel 32… Step motor D 33… Rotor 34… AL intermediate wheel 35… AL minute wheel 36… AL day Minute wheel 37… AL cylinder wheel 65… Second presser spring 201 …… Core CPU 202 …… Program memory 204 …… Data memory 211 …… Chronograph circuit 212 …… Motor hand control circuit 213 ～ 216 …… Motor driver 217 ... Input control and reset signal forming circuit 218 ... Interrupt control circuit 219 ... Motor moving method control circuit 220 ... Moving movement reference signal forming circuit 221 to 225 ... Motor drive pulse forming Road 226 to 229 ...... motor clock control circuit 230 to 233 ...... trigger forming circuits 234-237 ...... motor driving pulse selection circuit

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuhiro Koike 3-3-5 Yamato, Suwa City, Nagano Prefecture Inside Seiko Epson Corporation (72) Inventor Hiroshi Suzuki 3-3-5 Yamato Suwa City, Nagano Prefecture Say Inside Epson Co., Ltd. (72) Inventor Yoshitaka Iijima 3-3-5 Yamato, Suwa City, Nagano Prefecture Inside Seiko Epson Corporation (72) Inventor Shigeru Aoki 3-3-5 Yamato, Suwa City, Nagano Prefecture Seiko Epson Corporation (56) References JP-A-54-151071 (JP, A) JP-A-60-236083 (JP, A) JP-A-51-38662 (JP, A) (58) Fields investigated (Int) .Cl. ⁷ , DB name) G04C 3/14

Claims (5)

(57) [Claims] An at least core CPU, a program memory for storing software for operating the core CPU, a motor hand movement control circuit for outputting a drive control signal for each of a plurality of step motors based on a command of the software, and And a plurality of motor driver circuits for driving each of the step motors in response to a drive control signal for each of the step motors output from the motor hand movement control circuit. 2. The analog electronic timepiece IC according to claim 1, wherein said motor hand movement control circuit has a plurality of motor clock control circuits for controlling the number of hand movement pulses of each step motor. 3. The motor hand movement control circuit has a hand movement reference signal forming circuit for forming a hand movement reference clock which triggers movement of each step motor, and the hand movement reference signal forming circuit is based on a command of software. 3. The analog electronic timepiece IC according to claim 1, wherein a frequency of the hand movement reference clock is selectable. 4. A motor operation control circuit comprising: a plurality of driving pulse forming circuits for outputting motor driving pulses having different waveforms; and a stepping motor to determine which driving pulse to select based on a command of software. 4. The analog electronic timepiece IC according to claim 1, further comprising a motor hand operation control circuit. 5. An analog electronic timepiece IC according to claim 1, 2 or 3, or a plurality of stepping motors, and a plurality of wheel train mechanisms connected to the plurality of stepping motors. An analog electronic timepiece characterized by the above-mentioned.