JPS5838884A - Electronic timepiece - Google Patents

Abstract

PURPOSE:To make it easy to change control input line by selecting control input line from outside through a selection circuit that responds to selection signal. CONSTITUTION:Opening and closing of AND gates 12-15 that form a selection circuit in response to setting logical value of a selection circuit in response to setting logical value of a selection signal are controlled and the selection of control input lines 9-11 corresponding to external switches SW1-SW3, etc. changes. It is possible to change the external switch position essentially by changing easily control input lines without change of the wiring of a clock circuit substrate and addition of IC's.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timepiece having an externally controlled input switch, and more particularly to an electronic timepiece having an easily changeable position of the input switch.

Conventionally, in an IO for an electronic watch, a control input line is fixed to the control input line for the function within the XO. In such a case, in order to change the position of the external control input switch, it is necessary to change the wiring layout of the circuit board for transmitting the control input to the xO.

FIG. 1 shows an example in which the position of the external control input is changed, and FIGS. 3) and 3) respectively show an example in which the steps in FIGS.

111K, 1, flm, 1, and 2b are external input switches that generate the same control input, respectively (see FIG. 3), circuit board 4b company, external switch 24
The control inputs generated by B and 2h are connected to the control inputs of I03&-
In contrast, the wiring of the circuit board 46 in Fig. 3m) has been changed so that the control inputs generated by the external switches IS and 1& in Fig. 3) are the same.

However, in general, changing the wiring layout on the *n** board like this is a very difficult task and one
In many cases, it is impossible to change the wiring layout on the circuit board, and the pad position of the 01I control input line must be changed, and a new xot must be manufactured just for this purpose. (Even if it is 3KL, it is necessary to change the wiring lateraF of the circuit board), which is very disadvantageous from a cost standpoint.

The present invention eliminates the above drawbacks, and by changing the logical value of the selection signal provided in the XO, it is possible to easily select a desired control input line from a plurality of control input lines. The purpose of this is to make the conventional work of changing the XO or circuit board and manufacturing a new one more advantageous in terms of power saving and cost.

Hereinafter, the present invention will be explained in detail based on the accompanying drawings. still,
In the embodiment of the present invention, an example of a manual control KII of the stopwatch function is given, but the controlled object is not limited to the stopwatch function. The logical value of the selection signal is fixed by connecting it to a terminal on the - road board A, but the method of setting the logical value of the selection signal is not limited to this.

FIG. 1 is a ninth embodiment of the present invention, and shows an external view of a digital electronic watch with a stopwatch function), and the current display shows a stopwatch cover. . Figure 1) is the position of the external input switch in relation to ■ in the same figure! The modified version has a switch size of 16m2.
@ is both start/stop control switch 1
Both 6 and 26 are switches for performing wrap/reset control.

Figure 2 ■ is Figure 1 tl! This figure shows the pad layout of the work C to be performed. In 103a, ev1 to ev3 indicate a plurality of control input terminals, and 111 indicates a selection signal terminal. FIG. 2) is a diagram showing the correspondence between the set logical value of the 1s terminal shown in FIG. 2) and the control input terminal selected as the control input of the stopwatch function.

Figure 3 0. How many K, in Fig. 2) using xo3at-, Fig. 1 shows an example of the wiring layout and connection on the circuit board for expressing (1)
o indicates the circuit board, 5 indicates the logic level “l” (V*S,
6 indicates a terminal on the am board 4- at logic level 'L' (Vsa).

That is, in all ((1), terminal 16 of xoBm is connected to terminal 5 of Mac1 on the IIX circuit board, BWl is selected as the start/stop control input, and gv2 is selected as the wrap/stop control input. and therefore,
The concrete example shown in Fig. 1←) can be realized. Also, in Figure 3 0,
The same l036 and circuit board as in the same figure (b) [4a are used]
Te, X O3af) Fjllll child on the circuit board.
By connecting to the power terminal 6, the specific example shown in FIG. 1(c) can be realized in accordance with the correspondence shown in FIG. 2) as described above.

ζζ, the selection signal 1- shown in cylinder 4 (in Figure 4, in Figure 2)
Realizes the correspondence between the logical value of and the selected control inputs gv1 to gv3,! An example of a circuit for + is shown below.

41st! On the other hand, 8 is 4 choices! 9 to 11
Expanded control inputs for each of gv1 to gv3 indicate 1It-, ★ and 16 indicate peak mode signals, and 1■ indicates when the stopwatch is on.
1, t, i+, 17 are start/stop control lines)
, the wire is the wrap/return control line.

Here, consider the case where the selection signal 8 is 1111.

This is jlsl! ! ! 1 (corresponds to 1110. In this case, when the card signal is 1M", fi I")
For the /stop control line 17, lO is selected from among the control inputs 1II9.10 by game) 12.13. 11 of the control input lines 10.degree. 11 are selected for the wrap/reset control line 18 by gates 14.about.15.

On the other hand, if the selection signal 8 is -2, that is, in Fig. 3)
In this case, the control input line 0 is selected for the start/stop control line 17 and the control input line 11 is selected for the wrap/reset control line 18 in the same manner as described above.

As described above, in the present invention, the timepiece IC has a selection signal line and a selection circuit, and by setting the logical value of the selection signal, it is possible to easily change the input line for functional control within the timepiece IC. Because it is possible to change the position of the external input switch, the wiring layerer on the circuit board) 1-
Changed IC, ICt - the same IC without creating a new one
It also has the effect of being easily realized using a circuit board.

[Brief explanation of the drawing]

Figures 1) and ψ) are external views showing a clock in which the present invention is implemented, Figure 2 (■) is a bad layout diagram of a clock xC showing one embodiment, and Figure 2 (C) is the logic of the selection signal. Correspondence diagram showing an example of correspondence between values and selected controlled input lines, No. 8
The figure is a circuit block diagram for realizing the embodiments of Fig. 1←) and (to)). Embodiment FIG. 4 is a circuit diagram showing an embodiment of the present invention. ls, 6.2a, &, external input switch, 3a, i,
, hour hand x o, 4 a ~ a , o [1iH1t
lK, 56. D) Terminal, 6°. Ma ## terminal, 70. Switch spring, 800 selection Shinki line, 9-11. Control input line, 11-1600 selection game), 16. , SuF Tsubu Watch Movie - Do Shinkiso, 17. , start/stop control line, 18. , Wrap/Sryuut control line and above Applicant Daini Seikokin Co., Ltd. Agent Patent attorney Mutsuka Mogami 1 Figure 38)! 1 Figure 3. .

Claims (1)

[Claims] An electronic clock consisting of a According to the clock, the XO is provided with a selection signal line, a selection circuit, and a pipe, and outputs a plurality of control inputs from the external input switch to perform desired control of the 20 functions by the selection circuit according to the logical value of the selection signal. An electronic clock characterized by selection from control input lines.