JPH0454485A - microcomputer clock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a microcomputer timepiece that uses a high frequency oscillation element such as a crystal resonator and is capable of time adjustment.

[Conventional technology]

Conventionally, as seen in the general market, when adjusting the time, the desired time was set by turning the leash or pressing a time adjustment operation button.

[Problem to be solved by the invention]

In the conventional example, some kind of operation is required when adjusting the time. Recent electronic watches have a monthly difference of less than ±20 seconds,
You only need to adjust the time once every 1-2 months. However, generally speaking, adjusting the time is not a habit, and even once a month it is a nuisance, and some people feel resistance just by looking at the crown or operation buttons. .

In addition, the presence of a crown and operation buttons for adjusting the time is a bottleneck in watch design. The object of the present invention is to provide an accurate and beautiful My Hoon clock that can eliminate these drawbacks.

[Means to solve the problem]

The microcomputer watch of the present invention includes a small microphone inside the watch body, an amplification circuit that amplifies the signal obtained from the microphone, and a signal obtained from the amplification circuit that determines whether the signal is in tune and emits a signal when it is in tune. Using a tuning circuit and a signal obtained from the tuning circuit, the time is set to f! It is characterized by having a built-in IJ@L microcontroller.

〔Example〕

An example of the circuit of the present invention is shown in FIG.

First, the case of normal drive will be explained. As the microcontroller 1 of this embodiment, a 4-bit one-chip microcontroller TMP manufactured by Toshiba is used.
470200A is used.

For normal drive, set the timer/counter control mode to timer mode and set the internal pulse rate to
If Hz is selected, a value is set in the RAM address of timer counter A so that an interrupt occurs every second. On the other hand, by using timer counter B, a pulse with a width of 7.BmSeC is generated, and from the output port 10 (for example, 0PO4), a pulse as shown in the pulse waveform 201 in FIG. send.

Similarly, from output port 11 (for example, 0PO5), the second
A pulse as shown in pulse waveform 202 in the figure is sent to the motor.

As described above, the motor 2 is reversed every second to move the hands. A detailed explanation of how to use the functions of the TMP470200 is omitted since it is described in the 4-bit microcontroller TLC8-47 user's manual published by Toshiba Corporation.

Next, a method for adjusting the time will be explained.

First, the every second signal sent from the output port (10.11) of the microcomputer 1 is taken into the counter 6 of the 60 second timer. Reset to 0. If there is no second hand, use a standard watch to set it. If the counter 6 is set to O-reset as soon as the count reaches 60, the movement of the hand and the count will match.

As is well known, the time signal for TV, etc. is a preliminary signal (440H2) that is issued before the hourly time signal (880H2) by NHK and commercial broadcasters.
) are presented differently. The program of the microcomputer 1 can be used in any case, and in this embodiment, the NHK time signal will be explained as an example.

NHK's time signal emits six preliminary signals (440H2) as shown in the pulse waveform 203 in Figure 2, and then the hour signal (
880Hz) sounds. Therefore, in this embodiment, a time determination signal is issued one second after the preliminary signal is detected.

The signal is sent from the microphone 4 to the tuning circuit 6 via the amplifier circuit 5. When the tuning circuit 6 is tuned to the preliminary signal (440H2) K, the output signal 61 output from the tuning circuit 6 is normally H and becomes L when tuned.

The output signal 61 is connected to the external interrupt input terminal of the microcontroller 1 (
T1) and generates an interrupt. A program is created in the microcomputer 1 that determines that if a second interrupt occurs one second after the first interrupt occurs, and a fifth interrupt occurs one second later, it is a regular NHK time signal.

If it is determined to be a regular time signal, the hour signal (88
Create a program that generates a signal, pulse A, instead of (0, H2).

The pulse A is compared with the 0 reset signal of the counter 5 to calculate how many seconds the clock is behind or ahead. If the hands are moving forward, the movement of the hands will be stopped by the amount that the hands are moving.
A signal of Hz is sent to the output boats 10 and 11 to speed up the movement of the hands. The amount of correction is large (if it takes more than 1 second to correct, add the correction amount and correct it.

〔Effect of the invention〕

As described above, the present invention captures the time signal from TV etc. through the microphone, amplifies it with the amplifier circuit, and determines whether the time signal is transmitted to NHK or the like by the judgment circuit.
In addition to determining whether the watch is on a commercial station or a commercial station, it also determines how many seconds the clock is ahead or behind, and if it is behind, the hands will move forward, and if it is ahead, it will stop moving and automatically adjust the time. be.

According to the present invention, the time can be automatically corrected without bothering the user, and accurate time can be provided to the user. In addition, the method of the present invention does not require the use of a special and expensive crystal oscillator or any special circuitry in order to maintain high accuracy, and can provide an inexpensive and highly accurate timepiece.

Furthermore, since there is no need for time adjustment glue, buttons or operation buttons, it is possible to provide the user with a watch that has a clean and luxurious design.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention. Figure 2 is a pulse signal diagram. 1-...Microcomputer 2--Motor 6--Counter 4--Microphone 5--Amplification Circuit 6... - Tuning circuit 201 - - Drive pulse waveform 202 ...... Drive pulse waveform 203 -
・・・・・・NHK time signal 204・・・・・・・
...Pulse waveform plate for time adjustment Applicant Seiko Epson Co., Ltd. Agent Patent attorney Kizobe Suzuki (and 1 other person) 7.8ms S S S S S S 31.2ms Fig. 2 Fig. 1

Claims (1)

[Claims] Inside the watch is a small microphone, an amplifier circuit that amplifies the signal obtained from the microphone, and a tuning circuit that determines the tuning of the signal obtained from the amplifier circuit and emits a signal when it is tuned.
A microcomputer clock comprising a built-in microcomputer that can control the time using a signal obtained from the tuning circuit.