JPH0277679A - Analog electronic clock and its ic - Google Patents

Abstract

PURPOSE:To shorten a development period and easily cope with addition of functions and change in specifications by a method wherein traveling of a plurality of step motors can be freely controlled by software stored in a program memory. CONSTITUTION:A core CPU 201, a program memory 202 for storing software to operate the core CPU 201 and a motor traveling control circuit 212 which controls driving of a plurality of step motors according to the instruction of the software are provided. The circuit 212 has a plurality of motor clock control circuits for controlling the number of traveling pulses of the respective step motors. The circuit 212 also has a traveling reference signal forming circuit which forms a reference traveling clock to be a trigger for traveling of the respective step motors and is constituted so that frequency of the traveling reference clock can be selected according to the instruction of software.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an IC for an analog electronic watch and an analog electronic watch having multifunctional display means such as a chronograph display and a timer display.

[Prior art] In the conventional multi-functional analog electronic clock,
-286783, JP-A-61-294388, JP-A-6
As disclosed in No. 1-26191, etc., multiple functions have been realized using individual dedicated ICs.

The step motors used in these multi-function electronic watches are designed to suit their function and placement on the movement, such as for chronograph functions and alarm time displays. The drive pulses were set to ensure stable drive even under loads such as shocks or increased viscous resistance of lubricating oil in low-temperature environments, ensuring reliability.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, since a dedicated IC was required, (1) the development period for the IC is long, resulting in a delay in responding to market needs.

■When adding functions or changing specifications, the scale of change to the IC was large, and in the worst case, it was necessary to use a new IC.

■Functional variations cannot be supported by a single IC.

etc., cannot respond to diversifying consumer needs. In addition, the drive pulse of the step motor has a pulse width that ensures that the rotor rotates reliably against the impact of a drop or the load caused by the viscosity of lubricating oil at low temperatures, and that stable rotation can be obtained even during rapid movement of the hand. Because the frequency is set, the step motor consumes a lot of extra power. Therefore, 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 drawbacks, and its objectives are to shorten the development period, easily accommodate addition of functions and specification changes, accommodate functional variations, and reduce step motor consumption. The objective of the present invention is to provide ICs for analog electronic watches and analog electronic watches that satisfy diversifying consumer needs by realizing smaller and thinner movements through electrification.

[Means for Solving the Problems] In order to solve the above-mentioned problems, an IC for an analog electronic watch of the present invention includes at least a core CPU, a program memory storing software for operating the core CPU, and the software. It has a motor movement control diagram for controlling the drive of a plurality of step motors based on the commands.

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 diagram includes a hand movement reference signal forming circuit that forms a hand movement reference clock that is a trigger for the hand movement of each step motor, and the hand movement reference signal forming circuit is configured to generate a hand movement reference signal based on software instructions. The device may include means for selecting the frequency of the hand operation reference clock.

Furthermore, the motor hand movement control diagram includes a plurality of drive pulse forming circuits that output morph drive pulses with different waveforms, and a motor hand movement system control that determines which drive pulse each step motor selects based on software instructions. It may have a circuit.

Further, it may have a plurality of motor drivers for driving a plurality of step motors.

Further, the analog electronic timepiece of the present invention includes a plurality of step motors of the above-mentioned analog electronic timepiece IC1, and a plurality of wheel train mechanisms connected to the plurality of step motors.

Further, as a driving means for a step motor consisting of a rotor, a stator, and a coil, there is a means for driving with one type of fixed pulse width, and a driving means for having a plurality of driving pulses as disclosed in Japanese Patent Application Laid-Open No. 60-260833. The present invention is characterized in that it is comprised of a plurality of the step motors.

Further, there are two types of step motors: a step motor consisting of a rotor, a stator, and a coil, and having a rotation detecting means for determining whether the rotor is rotating or not; and a step motor having no rotation detecting means. An analog electronic timepiece having at least one step motor of the same type is characterized in that the rotor, stator, and coil of the step motors of the same type are configured in the same shape.

Furthermore, the step motor is composed of a rotor, a stake, and a coil and has a fast-forward movement function, and the step motor has two or more types of drive pulses for fast-forward movement, and the drive pulse for normal movement is the same as the drive pulse for fast-forward movement. It is characterized by having different settings.

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

[Embodiment 1] FIG. 1 is a block diagram showing an embodiment of an IC for an analog electronic watch of the present invention.

As shown in Figure 1, CMO5-IC20 is a core CP
This is a one-chip microcomputer for analog electronic watches that integrates a program memory, data memory, four motor drivers, a motor hand movement control circuit, a sound generator, an interconnected control circuit, etc. on a single chip centered on U. Below, FIG. 1 will be explained.

201 is a core CPU, which includes an ALU, arithmetic registers,
It consists of an address control register, a stack pointer instruction register, an instruction decoder, etc., and the peripheral circuits are an address bus (adbus) and a data bus (db
(us).

202 is a mask R with 2048 words x 12 O 48 configuration
This is a program memory consisting of OM, and stores software for operating the rC.

203 is an address decoder of the program memory 202.

204 is a RAM configured with l12wordX4b i
This data memory is used for timers for various watches, counters for storing the position of each hand, etc.

205 is an address decoder of the data memory 204.

An oscillation circuit 206 oscillates at 32768 Hz using a tuning fork type crystal resonator connected to the Xin and Xout terminals as a source.

An oscillation stop detection circuit 207 detects when the oscillation circuit 206 stops oscillating and resets the system.

208 is a first frequency dividing circuit, which sequentially divides the frequency of the 32768 Hz signal φ32k output from the oscillation circuit 206 and divides it into 1
A 6Hz signal φ16 is output.

209 is a second frequency dividing circuit, which receives the 16Hz signal φ1. is frequency-divided to a lHz signal φ. Note that the status of each frequency dividing stage from 8 Hz to IHz can be read into the core CPU 201 by software.

Further, in the IC of this embodiment, a 16 Hz signal φ16.8 Hz signal φs and an IHz signal φ1 are used as time included Tint for processing such as clock timekeeping. Time-included Tint occurs at the falling edge of each signal, and reading, resetting, and masking of each interwoven factor are all done by software, and the configuration is such that reset and masking can be performed individually for each factor. .

210 is a sound generator that forms a buzzer drive signal and outputs it to the AL terminal. The drive frequency, 0N10FF, and ringing pattern of the buzzer drive signal can be adjusted by software.

211 is a chronograph circuit, which is specifically configured as shown in Figure 2. When configuring a 1/100 second chronograph, the movement of the 1/100 second hand is controlled by hardware and software. It is possible to significantly reduce the load.

In FIG. 2, 211 is a clock forming circuit, and 5
From the 12Hz signals φ and 1□, the 100Hz signal φlo becomes the reference clock for chronograph measurement.

and 1 for forming the 1/100 second hand drive pulse Pf.
Clock pulse Pf with pulse width 3.91m5 at 00Hz
form c. 2112 is a 50-decimal chronograph counter, and φ passes through an AND gate 2119. . is counted and reset by a chronograph reset signal RCg output from the control signal forming circuit 2118. 2113 is a register, and the control signal forming circuit 211
When the split display command signal Sp is output from 8, the contents of the chronograph counter 2112 are held. 2
114 is a fiftial hand position counter, which counts the 1/100 second hand drive pulse Pf to 1/100.
Recording the display position of the second hand, control signal forming circuit 2118
Signal R for storing the ψ position of the second hand from l/100
It is reset by hnd. A coincidence detection circuit 2115 compares the contents of the register 2113 and the hand position counter 2114 and outputs a coincidence signal Dty when they match. Reference numeral 2116 denotes a φ position detection circuit, which outputs a φ detection signal Dto when detecting φ of the hand position counter 2114. 2117 is l/100 second hand movement control diagram, 1
/100 The chronograph counter 2112 and the hand position counter 2114 are in the operating state of the second hand and during the chronograph measurement period.
The clock pulse Pfc is passed through when the contents of
3 and the hand position counter 2114 do not match, and when the 1/100 second hand is not operating and the chronograph is measuring, the clock pulse Pfc is passed when the content of the hand position counter 2125 is other than φ. It is composed of Reference numeral 2118 is a control signal forming circuit which, according to software commands, generates a start signal St for instructing start/stop of chronograph measurement, and a split signal sp for instructing split display/cancellation of split display.
, a chronograph reset signal Rcg that instructs to reset chronograph measurement.

A φ position signal Rhnd for storing the φ position of the 1/100 second hand and Drv for commanding operation/non-operation of the 1/100 second hand are formed and output. Note that the 1/100 second hand can be driven only by the step motor C. Further, a 5 Hz carry signal φ outputted from the chronograph counter 2112 generates a chronograph interrupt CGint, and software can perform chronograph measurement processing after 115 seconds.

Reference numeral 212 denotes a motor movement control diagram, which is specifically configured as shown in FIG. 3, and outputs motor drive pulses to each motor driver based on instructions from software.

Below, FIG. 3 will be explained.

Reference numeral 219 is a morph hand movement system control circuit which stores the hand movement system of each motor according to commands from the software, and also stores Sa for selecting forward rotation drive ■, Sb for selecting forward rotation drive II, and Sc for selecting reverse rotation drive ■. , Sd for selecting reverse rotation drive II, and Se for selecting forward rotation correction drive are formed and output.

220 is a hand movement reference signal forming circuit, specifically the fourth
It is configured as shown in the figure, and forms and outputs a reference clock Cdrv for hand operation according to instructions from software.

In FIG. 4, 2201 is a 3-bit register that receives commands from software (address decoder 2202
data for determining the frequency of the hand movement reference clock Cdrv is stored. 2203 is a 3-bit register with a programmable dividing period of 22
At the falling edge of the hand movement reference clock Cdrv output from 05, the data stored in the register 2201 is taken in and stored. 2204 is a decoder, and register 22
Corresponding to the data stored by 03, 2.3.4.5.6
．． 8. Output the number 1016 in binary form. 2205
is a programmable frequency divider, which converts the 256Hz signals φ2 and 6 outputted from the first frequency division circuit 208 to the decoder 22.
If n is the numerical value output from 04, it is divided into 1/n and output. Therefore, the hand movement reference signal forming circuit 220 changes the frequency of the hand movement reference clock Cdrv to 128Hz, 853Hz, or 64H according to a command from the software.
z, 51.2Hz, 42.7Hz, 32Hz, 25.6
It is possible to select from eight types: Hz and 16Hz. Furthermore, the frequency of the hand movement reference clock Cdrv is changed at the time when the data is loaded into the register 2203, and since the data is read into the register 2203 in synchronization with the hand movement reference counter Cdrv, the frequency is changed from the previous frequency fa. When switching to the next frequency fb, be sure to
/ f a spacing is ensured.

Note that when the forward rotation drive I and the reverse rotation drive are performed in conjunction, the frequency of the hand operation reference clock Cdrv is limited to 64)(z or less).

221 is a first drive pulse forming circuit which forms and outputs a drive pulse Pa for normal rotation drive I shown in FIG.

A second drive pulse forming circuit 222 forms and outputs the drive pulse pb for normal rotation drive II shown in FIG.

A third drive pulse forming circuit 223 forms and outputs a drive pulse Pc for reverse drive I shown in FIG.

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

Reference numeral 225 denotes a fifth drive pulse forming circuit, which generates a group of pulses Pe for correction drive (normal drive pulse P1, correction drive pulse P2, AC magnetic field detection pulse P1, and AC magnetic field detection pulse P1 disclosed in Japanese Patent Laid-Open No. 60-260883). Detection pulses sp, , rotation detection pulses 5P2) are formed and output.

226, 227, 228, 229 are morph clock control circuits, which are specifically configured as shown in Fig. 9, and control the number of hand movement pulses of step motor A, step motor B, step motor C, and step motor D, respectively. is controlled by instructions from software.

In FIG. 9, 2261 is a 4-bit register that stores the number of hand movement pulses instructed by software. 2262 is a 4'bit up counter, and A
Hand operation reference clock Cd passing through ND gate 2274
rv and is reset by control signal 5reset. 2263 is a coincidence detection circuit, and register 2
261 and the contents of the up counter 2262, and when they match, a match signal Dy is output. 2264 is an all-1 detection circuit, which outputs an all-1 detection signal Dos when the contents of the register 2261 are all-1.

2265 is a trigger signal generation circuit for forming a morph drive pulse, which includes NOT gates 2266 and 2267, 3 manual AND gates 2268, 2 manual AND gates 2269.
Consists of 2-person OR game 1-2270, register 226
When all 1 (15) is set to 1, motor pulses are repeatedly output until other data is set, and when data other than all 1 is set, motor pulses are output for that data, and the next The motor pulse output is configured to stop until the data is set. 2271 is a bidirectional switch, and when the control signal 5read is output, ONL and the data of the up counter 2262 are placed on the data bus. 2272 is a control signal forming circuit, which includes a signal 5set for setting the number of hand movement pulses in the register 2261, a signal 5read for reading the data of the up counter 2262, and a signal 5read for resetting the register 2261 and the up counter 2262 according to instructions from software. signal 5res
ET is formed and output. Note that when the signal 5read is output, the NOT gate 2273 and the AND gate 22
74, passage of the hand operation reference clock Cdrv is prohibited. In this case, after reading, signal 5reset is generated to register 2261 and up counter 2262.
need to be reset. In addition, - number configuration circuit 226
3 detects a match (when it finishes outputting the set number of pulses), each motor generates a motor control included (Mint). If a motor control interrupt occurs, the software can read which interrupt occurred, and it can be reset after reading.

230.231.232.233 is a trigger forming circuit, which is outputted from the morph clock control circuit in response to hand movement method control signals Sa, Sb, Sc, Sd, and Se outputted from the motor hand movement method control circuit 219. Each drive pulse control circuit of 221.222.223.224.225 converts the trigger signal Tr into motor drive pulses Pa, Pb, P.
trigger signal Sat for forming c, Pd, Pe;
Pass as sbt, Sct, Sdt, Set23
4.235.236.237 is a morph drive pulse selection circuit, and the hand movement method control signals Sa, Sb, Sc, Sd,
A necessary drive pulse for each step motor is selected and output from motor drive pulses Pa, Pb, Pc, Pd, and Pe output from each drive pulse forming circuit in accordance with Se.

This concludes the explanation of FIG.

213, 214, 215, and 216 are motor drivers that alternately output motor drive pulses output from the morph drive pulse selection circuit to two output terminals of each motor drive circuit to drive each step motor. .

217 is an input control and reset circuit, A, B, C
, D, RAl, RA2, RBl, and RB2, and input terminals T and H are processed. Any one of the above A, B, C, D or RAI, R
When any one of the switches A2, RBI, and RB2 is input, a switch-in-crat 5Wint is generated. At this time, reading and resetting of the interwoven factors is performed by software. In addition, each input terminal is vs
i, and in the oven state the data φ
, data becomes 1 when connected to VDO.

The K terminal is a specification switching terminal, and two types of specifications can be selected depending on the data of the K terminal.

Note that reading of data from the K terminal is performed by software.

The R terminal is the system reset terminal, and the R terminal is ■. 0
When connected to the hardware, the core CPU, frequency divider circuit, and other peripheral circuits are forcibly set to the initial state.

The T terminal is a test mode conversion terminal, and the RA2 terminal is connected to V
. By inputting a clock to the T terminal while connected to D, it is possible to switch between 16 test modes for testing peripheral circuits.

The main test modes are forward rotation ■confirmation mode, forward rotation II
Confirmation mode, Reverse I confirmation mode, Reverse II confirmation mode,
It has a correction drive confirmation mode, a chronograph l/100 second confirmation mode, etc. In these confirmation modes, motor drive pulses are automatically output to each motor drive pulse output terminal.

To reset the system, connect the R terminal to vo. In addition to the method of connecting to the
For C, when any one of A or C and B and RA2 are input simultaneously, and when any one of A, B, or C and R
The system is configured such that the system is forcibly reset by hardware when A2 and RE2 are input simultaneously.

In addition, as a reset function that can be handled by software,
There is a frequency dividing circuit reset and a peripheral circuit reset, and when the peripheral circuit is reset, the frequency dividing circuit is also reset.

Reference numeral 236 denotes an included control circuit, which performs prioritization of each included, storage until reading, and reset processing after reading with respect to switch included, chronograph included, and morph control interrupt.

A constant voltage circuit 200 forms a low constant voltage of about 1.2V from the battery voltage (about 1.58V) applied between V DD and V si and outputs it to the VSI terminal.

This concludes the explanation of Fig. 16. As explained above in detail, the CMO5-IC20 has the following features regarding the drive of the step motor, and is not suitable as a multi-hand type multifunctional analog electronic watch IC. Excellent in wealth.

■It has motor drivers 213, 214, 215, and 216, and can drive four step motors at the same time.

■Hand movement control system control circuit 219 and drive pulse forming circuit 2
21 to 225 and morph drive pulse selection circuits 234 to 23
7, and each of the four step motors can be made to perform three types of forward rotation drive and two types of reverse rotation drive using software.

(2) 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.

■Motor corresponding to each of the four step motors.

It has clock forming circuits 226 to 229, 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 multifunctional analog electronic timepiece of the present invention is shown in FIG. 10 and will be described. In this embodiment, four step motors are used to achieve multifunctionality. Hereinafter, FIG. 1O will be explained.

1 is a base plate made of resin, and 2 is a battery.

3 is a step motor A for displaying the normal time, and is composed of a magnetic core 3a made of a highly transparent 6N material, a coil wound around the firl core 3a, a coil lead board and a coil frame whose both ends are terminal-treated so as to be electrically conductive. coil block 3b,
It is composed of a stake 3c made of a highly permeable material and a rotor 4 made of a rotor magnet and a pinion. Also, 5.6.7
, 8 are the fifth wheel, fourth wheel, fifth wheel, and fifth wheel, respectively, 9 is the hour wheel, and 10 is the hour wheel. The fifth wheel and hour wheel are located at the center of the watch body. With these array configurations, the minutes and hours of normal time are displayed at the center position of one watch body. FIG. 11 is a sectional view showing the engaged state of the transmission train for normal time hour and minute display. As shown in FIG. 6, the rotor pinion 4a is engaged with the fifth wheel & pinion 5a, meshes with the fourth gear 6a. Further, 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 l/1800
As the rotor 4 rotates half a revolution per second, the fifth wheel rotates once every 3600 seconds, that is, 60 minutes, making it possible to display the minutes of the normal time. Reference numeral 11 indicates a minute hand that is attached to the tip of the fifth wheel 8 to indicate the minutes. Also, number two 8
b meshes with the reverse gear 9a, and the reverse gear 9b meshes with the hour wheel 10. The reduction ratio from the second pinion 8b to the hour wheel 10 is l/12.

It is possible to display the normal time. 12 is.

The hour hand is attached to the tip of the hour wheel lO to display the time. In addition, in FIG. 10, 13 is a small second wheel arranged on the axis in the 9 o'clock direction of the watch body, the rotor 4, the fifth wheel 5
By means of a wheel train configuration including a second wheel 13, the seconds of the normal time are displayed on the axis of the watch body in the 9 o'clock direction. FIG. 12 is a sectional view showing the engaged state of the transmission train for normal time and seconds display. As shown in FIG. 0, the fifth pinion 5b is meshed with the small seconds gear 13a. The reduction ratio from the rotor pinion 4a to the small second gear 13 is l/30, and the rotor 4
By rotating 180'' per second, the small second wheel 13 rotates once every 60 seconds, that is, rotates 6 degrees per second, making it possible to display the seconds of the normal time.

Reference numeral 14 denotes a small second hand that is attached to the tip of the small second wheel 13 for displaying seconds. The step motor A is driven by detecting the magnitude of the induced voltage generated by the free vibration of the rotor 4 after applying a drive pulse, and determining whether it is rotating or not. If it is determined that it is not rotating, a correction pulse is immediately applied. is applied to ensure that the rotor rotates. Detection of rotation of the rotor is described in detail in Japanese Patent Laid-Open No. 60-260833. By detecting the rotation of the rotor, it is possible to narrow the drive pulse, and it is possible to reduce the power consumption of the step motor A, which is constantly driven at IHz.

In FIG. 10, 15 is a step motor B for displaying the chronograph second hand, and the magnetic core 15 is made of a highly permeable material.
a, [a coil block 15b consisting of a coil wound around a core 15a, a coil lead board and a coil frame whose ends are terminal-treated to enable conduction; a stator 15c made of a high magnetic permeability material;
The rotor 16 is composed of a rotor magnet and a rotor pinion. Also, 17, 18, and 19 are each 115
They are a seconds CG first intermediate wheel, a 115 seconds CG second intermediate wheel, and a 115 seconds CG wheel, and the 115 seconds CG wheel is placed at the center position of the watch body. This wheel train configuration allows the chronograph seconds to be displayed at the center of the watch body.

FIG. 13 is a sectional view showing the engaged state of the gear train for displaying seconds in this chronograph. As shown in FIG. 6, the rotor pinion 16a meshes with the 115 seconds CG first intermediate gear 17a, The second CG first intermediate pinion 17b meshes with the 115 second CG second intermediate gear 18a. Also, 115 seconds C
Although the G second intermediate pinion 18b meshes with the 115 second CG gear 19a, the uninterrupted ratio from the rotor pinion 16a to the 115 second CG gear 19a is 1/150.

The rotor 16 is activated by the electric signal from CMO5-IC20.
rotates 180° in 115 seconds. For this reason, 115 seconds C
The G car 19 generates 1.2'' in 115 seconds, or 1.2'' in 1 second.
The 6115 second CG car 19 is capable of displaying chronograph seconds in 115 second increments in 2'' x 5' x 5 steps, 60 seconds per lap.
Rotate the second in 360°/1.2” = 300 steps,
This allows the chronograph to display 115 seconds. It is the G needle. Further, the 115 second CG hand 21 also functions as a timer setting hand for setting the timer time. This timer operation will be described later. This step motor B consumes a large amount of power because it is driven at 5 Hz during chronograph operation. However, by detecting the rotation of the rotor, the width of the drive pulse can be narrowed, and the power consumption can be reduced to about half that of conventional chronographs.

FIG. 17 is an external view of the completed multifunctional electronic timepiece of this embodiment. The hands driven by the step motor A are the small second hand 14, the minute hand 11 and the hour hand 12.The hands driven by the step motor B are the 115 seconds CG hand 21.The 0 minute hand 11, the hour hand 12 and the 115 seconds CG hand 21 are It is large, has a large weight and unbalance, and the load on the rotor due to impact is also large. Therefore, there is a possibility that the rotor will not rotate if a narrow drive pulse is applied, albeit accidentally. In order to compensate for such defects, the step motors A and B detect the rotation of the rotor, and when the rotor does not rotate, immediately output a correction pulse to ensure reliable rotation.

27 is a motor C for displaying the minutes of the chronograph and the time and seconds of the timer, and has a magnetic core 27a made of a highly permeable material.
, a coil block 27b consisting of a coil wound around an m-core 27a, a coil lead board whose both ends are terminal-treated to enable conduction, and a coil frame.

It is composed of a stator 27c made of a highly permeable material, and a rotor 28 made of a rotor magnet and a rotor pinion. Also,
29 and 30 are a minute CG intermediate wheel and a minute CG wheel, respectively, and the minute CG wheel 30 is arranged on the axis in the 12 o'clock direction of the watch body. With this wheel train configuration, the minutes of the chronograph and the seconds of the elapsed time of the timer are displayed on the 12 o'clock axis of the watch body. FIG. 14 is a sectional view showing the engaged state of the wheel train for displaying the chronograph minutes and timer elapsed time and seconds. As shown in the figure, the rotor pinion 28a meshes with the minute CG intermediate gear 29a, and the minute CG
The intermediate pinion 29b meshes with the minute CG gear 30a.

The reduction ratio from this rotor pinion 28a to the minute CG gear 30a is 1/30. In the case of chronograph mode, the electric signal from 0MO5-IC20 causes the rotor 2 to
8 is a rate of 360' per minute, or 180' every 30 seconds.
Rotate in °×2 steps. Therefore, the minute CG wheel rotates 12 meters in one minute, or 360" (12° x 30 steps) in 30 minutes, making it possible to display chronograph minutes for 30 minutes. 31 is the minute CG wheel for chronograph minute display. This is the minute CG needle attached to the tip of the car.This minute CG needle 31
In combination with the aforementioned 115 second CG hand 21,
In the case of the 0-order timer mode, which can display a chronograph with a minimum reading unit of 115 seconds and a maximum measurement of 30 minutes, the rotor 28 is activated by the electric signal from the CMO3-IC20 in the opposite way to the chronograph mode. Rotor 2
8 rotates in the opposite direction to that in chronograph mode. This rotation is 180 @ x 1 step per second, and the minute CG hand 31 rotates counterclockwise in 1 second increments, and the timer elapsed time of 60 seconds per revolution is displayed in seconds. is 180" x 5 per minute in the opposite direction to the chronograph mode by the electrical signal from 0MO5-IC20.
Step rotation. Therefore, the 115-second CG hand 21 rotates counterclockwise at a rate of 6 degrees per minute to display the elapsed time of the timer. Also, as for setting the timer time,
When the second winding stem 23 is in the first stage in Figure 1O, each time the B switch 25 is pressed, the rotor 16 moves 180'X5.
The 115-second CG hand 21 rotates in steps of 6 degrees (1 minute mark on the scale) and displays the timer setting time up to 60 minutes.

Fig. 10 32 shows a step motor D for displaying the alarm setting time, an m-core 32a made of a highly permeable material, a coil wound around the m-core 32a, and a coil lead board in which both ends of the coil are terminal-treated so as to be electrically conductive. A coil block 32b made of a coil frame, a stake 32c made of a highly permeable material, and a rotor 33 made of a rotor magnet and a rotor pinion.

Also, 34, 35, 36, and 37 are AL intermediate cars, respectively.
AL minute car, AL day car, AL hour car, AL minute car 3
5 and the AL hour wheel 37 are arranged on the axis in the 6 o'clock direction of the watch body. With these array configurations, the alarm setting time is displayed on the 6 o'clock axis of the watch body. 15th
The figure is a cross section showing the engaged state of the wheel train for displaying the alarm setting time. As shown in the figure, rotor 3
3a meshes with the AL intermediate gear 34a, and the AL intermediate gear 3
4b meshes with the AL minute gear 35a. Also, AL
The part 35b meshes with the back gear 36a of the AL day,
The hidden part 36b is engaged with the AL hour wheel 37. The reduction ratio from the rotor pinion 33a to the AL minute gear 35a is l
/30, and the reduction ratio from the AL pinion 35b to the AL hour wheel 37 is 1/12. In addition, 38 is an AL minute hand that is tightly fitted to the tip of the AL minute wheel 35, and 39 is an AL minute hand that is attached to the tip of the AL minute wheel 35.
This is the AL hour hand fitted to the tip of the hour wheel 37.

When the second volume stem 23 is in the first stage, it becomes alarm set mode, and each time the C switch 26 is pressed, the CMO3-IC
The rotor 33 rotates 180 degrees by the electric signal from the rotor 20. Therefore, the AL minute hand rotates 6° (1 minute on the scale) and the AL clock rotates 05°. This allows you to set the alarm time in 1 minute increments for up to 12 hours. Also, at this time, C
When the switch 26 is held down, the AL minute hand 38 and the AL hour hand 39 continuously move at an accelerated rate and are fast-forwarded at a maximum of 128 Hz, making it possible to set the alarm time in a short time. As shown in FIG. 23(a), the drive pulse for the step motor at this time has a pulse width of 4.39 m5 ec and a pulse interval of 7.81 m5 ec, and the next half rotation pulse is output.

Thereafter, when the set alarm time and the normal time match, an alarm sound will sound. In addition, when the second volume stem 23 is in the 0th step, the alarm off mode is activated, and the AL minute hand 38 and A
The L hour hand 39 normally displays the time. At this time, a drive pulse with a pulse width of 4.39 m5ec and 128 Hz is applied to the step motor D, and the time is switched to the normal time in a short time.

After switching to the normal time, the rotor 33 is CMO3-IC2
It rotates in 180° steps every minute based on an electrical signal from 0. Therefore, the AL minute hand 38 performs one-minute movement.The driving pulse of the step motor D during this one-minute movement is a pulse of 6.84 m5ec, as shown in FIG. 0.24m5ec
5 pulses are output. This pulse is set to allow the rotor to rotate sufficiently to withstand the load on the rotor due to shocks that occur accidentally when carrying a watch or due to increased viscous resistance of lubricating oil in a low-temperature environment. Therefore, reliable normal time display can be performed.

FIG. 23(b) shows an example of the drive pulse applied to the step motor for operating the 1/100 second hand.

The drive pulse has a width of 3.91 m5ec and is output at 100 Hz. The pulse width is narrower than the fast forward pulse shown in FIG. 23(a). This is because when the magnetomotive force of the step motor coil is large or when the rotor magnet is made small, the rotor rotates quickly and stable operation can be obtained with narrow pulses. If you increase the electromotive force of the coil of step motor D or make the rotor magnet smaller, the width of the drive pulse will be 3.91m5.
You can set it to ec or lower, in this case,
Since the pulse width can be narrow, fast forwarding of 128 Hz or more is also possible.

FIG. 24 is a schematic diagram of the step motor A and the driven wheel train group viewed from the dial side, and the arrows in the figure indicate the rotational directions of each wheel train. The rotation of the rotor 4 is transmitted to the fifth wheel 5 and further to the small seconds wheel 13, where the seconds are displayed by the small seconds hand 14. Further, the signal is transmitted from the fifth wheel 5 to the fifth wheel 8 via the fourth wheel 6 and fifth wheel 7, and the minutes are displayed by the minute hand 11. Further, the signal is transmitted from the fifth wheel 8 to the hour wheel 9 and the hour wheel 10, and the hour hand 12 indicates the hour. In this way, the time is displayed by moving the hands of the step motor A, counting from the rotor 4, seconds are displayed by the 3rd column, 1 minute is displayed by the 5th column, hours are displayed by the 7th column, and odd-numbered columns.

Figure 25 shows step motor B that displays chronograph seconds.
The rotation of the rotor 16, which shows the 115 seconds CG wheel, is first transmitted to the 115 seconds CG first intermediate wheel 16, then further transmitted to the 115 seconds CG second intermediate wheel, and the 115 seconds CG hand 21 is tightly coupled to the 115 seconds CG wheel. The chronograph will display 115 seconds. In this way, the chronograph display using step motor B is performed using the 4th and even-numbered wheel train counting from rotor 16, so step motor A cannot be used as is. A
What is necessary is to rotate the rotor 4 in the opposite direction. For this purpose, the inner notches 3d and 3e of the stator A3C in FIG. 24, which are opposed to the center of the rotor 4, should be rotated 90'', that is, in the positions shown at 15d and 15e in FIG. Good, stator A and stator B have exactly the same external shape and can be processed in the same manufacturing process, and can be easily processed by simply changing the position of the inner notch, so there is a great cost advantage. Also, coil blocks 3b and 15b are exactly the same. Because we use the same products, we not only process parts, but also
Assembly is also simplified.

FIG. 26 shows the step motor D and the gear train group that displays the alarm time. The rotation of the rotor 33 is transmitted to the AL minute wheel 35 via the AL intermediate wheel 34, and the AL minute hand is coupled to the L minute wheel 35. 38 is used to display the alarm minutes, and AL
The rotation of the minute wheel 35 is transmitted to the rear wheel 36 on the AL day, and then
A transmitted to the L hour wheel 37 and engaged with the AL hour wheel 37
An alarm is indicated by the L hour hand 39. In this way, the alarm time display on the step motor D is performed on the rotor 33.
Counting from the top, the third indicates the minutes, and the fifth indicates the hours, using odd-numbered train wheels. Therefore, stator D32
The inner notches 33d and 33e of C are in the same position as the stake A3c shown in FIG. Further, the step motor C that performs the chronograph minute display is exactly the same as the step motor D, and the gear train and the pinion tooth shape are also the same.

Next, the differences between the two types of step motors, step motor A or step motor B and step motor C or step motor D, will be explained. Step motor A is driven at IHz, 5H when step motor B's chronograph function is activated.
The step motor C and the step motor D are driven at 1/60 Hz, that is, the hands move one minute. Therefore, the power consumed by step motor A and step motor B increases. In order to suppress this power consumption as much as possible, rotation of the rotor is detected by detecting the magnitude of the induced voltage generated by free vibration of the rotor after applying a drive pulse. It is generally known that this generated induced voltage increases in proportion to the number of turns of the coil. Therefore, the coil blocks used in step motor A and step motor B are wound with as much coil wire as possible.

It is possible to make the coil wire thinner and increase the number of turns, but thin rigid wire not only increases the resistance value per unit length and causes losses such as Joule heat, but also causes problems such as disconnection of the wire for parts processing. It is not a good idea to make the wire for the coil thin as it may cause problems.In a step motor like this, which detects the rotation of the rotor, it is necessary to make the coil as large as possible6.
Regarding rotor rotation detection, Japanese Patent Application Laid-Open No. 60-2608
83.

On the other hand, the step motor C and the step motor D are applied with a drive pulse once every 60 seconds, so the power consumption of the entire multi-function electronic watch is small. Therefore, they require a complicated circuit configuration and take up a large space. It is more advantageous to set a simple drive pulse that takes into account the load on the rotor than to detect the rotation of the rotor, which requires a coil block occupied by the rotor. Loads that are applied to the rotor include the shock caused by a fall or the increase in viscous resistance of lubricating oil at low temperatures. It is sufficient to increase the pulse width by about 2 to 5 times. Also, JP-A-60
-260833 may be set as the drive pulse. In this example, the width of the drive pulse for step motor A and step motor B is 2.44 m5ec.
The step motor C is 4.39m5ec.

Further, the step motor D has the correction pulse P2 set as a drive pulse. In this way, with a step motor that outputs only a small number of drive pulses, the drive circuit can be simplified by simplifying the rotor drive method, and the coil block can also be made smaller, so the step motor occupies a smaller plane size. Hitoshi too. Therefore, two step motors C,
D can be made smaller and the movement as a whole,
It has become possible to downsize.

Since the hand movements of the step motor C when the chronograph function is activated and the normal time display of the step motor D are 1 minute movement, the power consumption of the motor is compared to the 1 second movement of the step motor A and the 115 second movement of the step motor B. Very few,
Therefore, if one type of drive pulse is set in advance with enough margin to rotate the rotor against the load, the configuration of the drive circuit will not become complicated.
As shown in the figure, 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. All of these hands are small and relatively light in weight and unbalance, so the load on the rotor at the time of impact is less than that of the hour and minute hands and the 115 seconds CG hand. Therefore, it is sufficient that the drive pulses of the step motors C and D have a width that is two to five times the pulse width when the rotor is rotating under no load. In addition, the correction pulse P2 described in JP-A No. 60-260833 may be used as the driving pulse. In order to drive the step motor with one type of pulse fixed in this way, the pulse width must be set to 2 at no load. Since it is necessary to set the speed up to 5 times, a step motor that moves the hands faster than 10 seconds will consume a lot of power, so 1/1
When driving at 0 Hz or higher, by detecting the rotation of the rotor, the pulse width can be narrowed and power consumption can be reduced. 1
For driving at frequencies lower than 710 Hz, it is better to drive with fixed pulses to avoid complicating the circuit configuration and use MOS-I.
The C-chip is also smaller and more effective.As mentioned above, the present invention makes it possible to reduce the power consumption of the sup motor.The thickness of the movement can be reduced by 10% by using a button-type battery that is thinner than before. was completed.

FIG. 16 shows a circuit connection diagram between the CMOS-IC 20 and other electric elements. In FIG. 16, 2 is a silver oxide battery (
SR927W), 3b is the coil block of step motor A, 15b is the coil block of step motor B, 2
4 is the A switch, 25 is the B switch, 26 is the C switch, 27b is the coil block of step motor C, 32b
is a coil block of step motor D, 55 and 56 are buzzer drive elements, 55 is a booster coil, 56 is a mini-molded transistor with a protection diode, 57 is C
O, luF chip capacitor for suppressing voltage fluctuations in the constant voltage circuit built into MOS-IC20, 58
46a is an ultra-small tuning fork crystal oscillator that is the source of the oscillation circuit built into the CMOS-IC20, and 46a is a bar 46.
A switch 59a is formed on a portion of the second watch case 59, and a piezoelectric buzzer 64 is attached to the back cover of the watch case, although it is not shown in FIG. Note that the switches 24, 25, and 26 are push button type switches, and can be input only when the button is pressed. Further, the switch 46a is a switch that is linked to the first volume stem 22, and the RA is activated at the first stage of the first volume stem 22.
It is configured to be closed with the I terminal, closed with the RA2 terminal in the second stage, and open in the normal position. Further, the switch 59a is a switch that is linked to the second volume stem 23, and is a switch that is linked to the second volume stem 23.
The first stage is closed to the RBI terminal, the second stage is closed to the RB2 terminal, and the normal position is open.

FIG. 17 is an external view of the completed multifunctional electronic timepiece of this embodiment. The specifications and operating method of this embodiment will be briefly explained based on the flowcharts shown in FIGS. 17 and 18 to 22.

In FIG. 17, 40 is an outer case, and 41 is a dial. Also, on the dial, 42 is 2I! X seconds time display section, 43 is a chronograph minute display and timer elapsed time second display section, and 44 is an alarm setting time display section.

First, regarding the normal time, the six-time setting indicated by the small second hand 14, minute hand 11, and hour hand 12, which move every second as described above, can be made by pulling out the first volume stem 22 to the second stage. At this time, the fourth wheel & pinion 6 is regulated by the regulation lever 47 that engages with the stopper 45 and the bolt 46 shown in FIG. 10, the rotor 4 is stopped, and the movement of the small second hand is stopped. If the first winding stem 22 is rotated in this state, the winding wheel 4
8. Rotational force is transmitted to the sun wheel 9 through the small iron car 50.

Here, since the second gear 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 second pinion wheel 9, and the second pinion 8b are connected. 8b, the hour wheel 10 rotates. Therefore, the minute hand 1 and the hour hand 12 rotate and can be set to any desired time.

Fig. 18 shows a flowchart for displaying the normal time.As shown in Fig. 18, when IHz included is input, it reads whether switch RA2 is off or not, and if RA2 is off, In this case, the motor hand movement method control circuit 219 is set to normal rotation correction drive of the step motor A, and the motor clock control circuit A226 is set to the number of hand movements of 1.
Set. Switch RA2 is on (time adjustment state)
In this case, the frequency dividing circuit 208 stops driving the motor and starts driving the motor 1 second after RA2 is turned off.
and instantaneously resets 209.

Figure 19 shows a flowchart of the chronograph function.
In addition, °' CG " used in Fig. 25 is an abbreviation of chronograph. Also, °' CG start" indicates that the chronograph is being measured and the split display is canceled.
When the winding stem 23 is in the normal position (when RBI and RB2 are both set), the watch is in chronograph mode, and each time the A switch is input, chronograph measurement starts and stops. When chronograph measurement is started, a CG115 second counter formed in a part of the data memory 204 is incremented by 1 by CG included.

When the 115-second CG second 21 moves in 115-second increments and the 115-second counter counts one minute, the CG minute counter, which is also formed in a part of the data memory 204, increases by 1 and the minute CG hand 31 moves in one-minute increments. The hands will be moved. Also, if the B switch is input at the time of ``CG start'', the display mode will be split, and if the B switch is input in the split display mode, the CG start will be ``CG start'', which will take 115 seconds.
The G hand 21 and the minute CG hand 31 are fast-forwarded until they display the measured time. In addition, if the B switch is input while the chronograph measurement is stopped, the chronograph measurement is reset and each CG
The hands are fast forwarded until they display the θ position. The method of fast-forward movement of the hands is shown in the flowchart of FIG. 22.

FIG. 20 shows a flowchart of the timer function. The timer setting time is displayed by the CG meter 21 for 115 seconds.

When the second volume stem 23 is in the first stage (RBI is on), it is in timer mode, and when the B switch is input during the timer set state, the timer set time increases by one minute.
The 115-second CG hand 21 moves in steps of 1 minute (5 steps). The scale on the dial 41 indicated by the 115-second CG hand 21 indicates the timer setting time, which can be set to a maximum of 60 minutes. Start and stop of the timer is performed by the A switch 24. When the timer starts, the minute CG counter 31 moves counterclockwise every second, the 115 second CG hand 21 moves counterclockwise every minute, and the elapsed time of the timer is displayed. indicate.

Also, when the timer is set for 1 minute and the final 1 minute, the minute CG is
The hand 31 stops, the 115 second CG hand 21 subtracts every second, a warning sound sounds from 3 seconds before the final time, and when it reaches 0 seconds, a time-up sound sounds and the timer operation ends. do.

FIG. 21 shows a flowchart of the alarm function, and the alarm setting time is displayed on the 44th section on the dial. With the second volume stem 23 set to the first stage, each time the C switch 26 is pressed, the AL minute hand 38 and the AL hour hand 39 move by one minute, allowing the alarm time to be set for a maximum of 12 hours. At this time, if you keep pressing the C switch 26, the AL minute hand 38 and the AL hour hand 39
It runs continuously at an accelerated rate, making it possible to set an alarm time in a short period of time. When the set alarm time and the normal time match, the alarm sounds. Also, Volume 2 Shin 23 is 0
When the alarm and the above-mentioned timer are in the non-operating mode, the AL minute hand 38 and the AL hour hand 39 display the normal time. The normal time is corrected by rotating the second winding stem in the second stage state via the AL wheel wheel 49 and the AL small iron wheel 51 shown in FIG.

Fig. 22 shows a flowchart of the hand movement method of each motor. Fig. 22 (a) shows the motor hand movement method when the number of hand movement is 14 or less, and Fig. 22 (b) and (C) show the method of hand movement of the motor when the number of movement is 15 or less. The above is the fast forward (128Hz) hand movement method. The ``°° motor pulse register'' used in Figure 1 is the 9th
This is the register 2261 in the figure.

Although the present invention has been described with a focus on a chronograph as the software content for operating the CPU, it is also possible to use world time, which indicates the time in various cities around the world, as shown in FIG. The minute hand 70 and hour hand 71 indicate the home time. Small second hand 72. World time minute hand 74 indicating world time
, an hour hand 75, and a city selection hand 73 indicating the city name.

The city selection hand 73 has the same configuration as the 115-second CG display during the chronograph function described above, and the number of divisions of the lap is 3.
00 steps. The city name is displayed at 12 locations 79 in 30 parts indicating the basic time and at 12 locations 80 in the middle of each display section. In this way, the rotor 16 that constitutes the step motor B can be displayed in 24 divisions instead of 300 divisions.
to drive. Reference numeral 78 is a crown for correcting the minute hand 70 and hour hand 71 that display the basic clock.

Next, we will explain how to operate it. Push the crown 78 so that the small second hand 72 is O.
When the position is reached, the two-stage drawer is stopped. Rotate the dial to set the home time minute and hour hands to the current time 6
Next, use the buttons 76 and 77 to set the city selection hand 73 to the city name that corresponds to the home time. For example, Tokyo (TOK)
At this time, the city selection hand 73 is rotated clockwise using the button 76 and counterclockwise using the button 77. In this state, pull out the watch 78 to the first stage and use the buttons 76 and 77 to set the world time.

The minute hand 74 is configured to advance by one minute with each push of the buttons 76 and 77. In addition, it is an electronic correction method that moves automatically by holding down the button. Furthermore, clockwise direction by button 76, button 77
is corrected counterclockwise.

This concludes the description of the embodiment.

[Effects of the Invention 1] As described above in detail in the embodiments, according to the present invention, analog electronic watches/ICs and analog electronic watches with various specifications can be created depending on the software stored in the program memory. Become. Further, the software development period is 172 to 1/3 of the development period of a random logic IC that implements the same function, which can significantly shorten the IC development period. Furthermore, even if changes in usage or addition of functions occur during development, it can be easily handled by changing the software.

In addition, by reducing the power consumption of the step motor, the movement can be made smaller and thinner, making it possible to provide analog electronic watch ICs and analog electronic watches that meet diversifying consumer needs in a short period of time. Become.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an IC for analog electronic timepieces according to the present invention. FIG. 2 is a block diagram showing a specific example of the configuration of the chronograph circuit 211 shown in FIG. 1. FIG. 3 is a block diagram showing a specific example of the configuration of the motor hand movement control circuit 212 shown in FIG. 1. FIG. 4 is a diagram showing a specific configuration example of the hand movement reference signal forming circuit 220 shown in FIG. 1. 5, 6, 7, and 8 are the first drive pulse forming circuit 221, second drive pulse forming circuit 222, third drive pulse forming circuit 223, and fourth drive pulse forming circuit shown in FIG. 1, respectively. Motor drive pulse Pa output from circuit 224
, Pb, Pc, and Pd timing chart. Figure 9 shows the morph clock control circuit 226.22 of Figure 1.
7.228. and 229 is a block diagram showing a specific configuration example. FIG. 10 is a plan view showing an embodiment of the analog electronic timepiece of the present invention. FIG. 11 is a sectional view of an example of a shaft for normal time, hour and minute display. FIG. 12 is a sectional view of a wheel train for normal time and seconds display. FIG. 13 is a cross-sectional view of the chronograph seconds display wheel train. FIG. 14 is a cross-sectional view of the chronograph minute display and timer second display arrays. FIG. 15 is a sectional view of the alarm setting time display column. FIG. 16 is a circuit connection diagram of the embodiment shown in FIG. 10. FIG. 17 is a completed diagram of the multifunctional electronic timepiece of this embodiment. FIG. 24 is a schematic plan view of the regular time display wheel train and step motor. FIG. 25 is a schematic plan view of the chronograph seconds display column and step motor. FIG. 26 is a schematic plan view of the alarm setting time display axis row and the 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...Fifth wheel & pinion 6...Fourth Car 7...Fifth wheel 8...Fifth wheel 9...Hinner wheel lO...Mountain wheel 15... ...Step motor B 16...Rotor 17...115 seconds CG first intermediate wheel 18...
...115 seconds CG second intermediate car 19...1
15 seconds CG car 20...CMO3-IC 27...Step motor C 28...Rotor 29...Minute CG intermediate car 30... ...Minute CG car 32...Step motor D 33...Rotor 34...AL intermediate car 35...AL minute car 36......AL day wheel 37...AL hour wheel 65...Second kana presser spring 201...Core CPU 202... ...Program memory 204...
...Data memory 211...Chronograph circuit 212...
...Motor movement control diagram 213-216...Motor driver 217...Input control and reset signal formation circuit 218...Incrat control circuit 219...
...Motor total system control circuit 220...
・Hand movement reference signal forming circuits 221 to 225... Motor drive pulse forming circuits 226 to 229... Motor clock control circuits 230 to
233...Trigger formation circuit 234-237...Motor drive pulse selection circuit Applicant: Seiko Epson Co., Ltd. Agent Patent attorney: Kizobe Suzuki (1 other person) Fig. 12 Fig. 16 Fig. 17 Figure 18 (b) Figure 18 (Q) Figure 21 (C) Figure 22 (C,) Figure 23 (b)

Claims (1)

[Scope of Claims] (1) At least a core CPU, a program memory that stores software for operating the core CPU;
and an IC for an analog electronic watch, characterized in that it has a motor hand movement control circuit for controlling the drive of a plurality of step motors based on instructions from the software. (2) The analog electronic timepiece IC according to claim 1, wherein the motor hand movement control circuit includes 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 that forms a hand movement reference clock that is a trigger for the hand movement of each step motor; 3. The analog electronic timepiece IC according to claim 1, wherein the IC is configured such that the frequency of the reference clock can be selected. (4) The motor hand movement control circuit includes a plurality of drive pulse forming circuits that output motor drive pulses with different waveforms, and a motor movement method in which each step motor determines which drive pulse to select based on software instructions. Claim 1 or Claim 2 characterized by comprising a control circuit.
Alternatively, the analog electronic timepiece IC according to claim 3. (5) The analog electronic timepiece IC according to claim 1, 2, 3, or 4, further comprising a plurality of motor drivers for driving the plurality of step motors. (6) IC for an analog electronic watch according to claim 1, claim 2, claim 3, claim 4, or claim 5;
An analog electronic timepiece comprising a plurality of step motors and a plurality of wheel train mechanisms connected to the plurality of step motors. (7) As a driving means for a step motor consisting of a rotor, a stator, and a coil, there is a means for driving with one type of fixed pulse width, and a driving means for having a plurality of driving pulses as disclosed in JP-A No. 60-260833. An analog electronic timepiece comprising a plurality of the step motors. (8) At least two types of step motors are provided: a step motor consisting of a rotor, a stator, and a coil, and having a rotation detecting means for determining whether the rotor is rotating or not; and a step motor having no rotation detecting means. An analog electronic timepiece comprising one or more step motors, wherein the rotor, stator, and coil of the step motor of the same type are configured in the same shape. (9) It has a step motor that is composed of a rotor, a stator, and a coil and has a fast-forward movement function, and the step motor has two or more types of drive pulses for fast-forward movement, and the drive pulse for normal movement is the drive pulse for fast-forward movement. An analog electronic clock characterized by having different settings.