JPS60202378A - Electronic timepiece - Google Patents

Abstract

PURPOSE:To enable the alteration of many functions by switching timepiece functions in an IC utilizing an EPROM. CONSTITUTION:Terminals 3-5 are set to the level H or L depending on the contents written into an EPROM1 from a terminal 2 and according to the set condition, a decoder section 14 operates to output a hand running pulse with the set width by one sec from a terminal 13. A larger number of pulse widths can be set by increasing the number of bits in the EPROM1 and the pulse width itself can be made freely by altering the circuit of the decoder section 14.

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a method for achieving a
[Prior art] Regarding an electronic watch that changes the function of an IC [Prior art] In the conventional Xa for a watch, for example, as seen in an IC for an analog watch, the interval and pulse width of the output pulse that drives the stepping motor for hand movement are as follows. The problem was addressed by changing the aluminum mask in response to user requests. Similarly, digital clock ICs also use 2.4-hour system and 1-hour system.
When switching to a two-hour system, this was done by changing the aluminum mask. In addition, in multifunctional watch ICs with a built-in CPU, conventionally, read-only memory (
Since the CPU was controlled by a mask ROM (hereinafter referred to as a mask ROM), it was necessary to prepare a mask each time a function was changed in response to a user's request.

As mentioned above, in conventional function switching using masks, when the number of function switches increases, the number of masks increases, the cost burden increases, and there is also a risk of incorrect masking during IC manufacturing. This caused the problem of increasing the burden on management.

〔the purpose〕

The present invention is intended to solve these problems, and its purpose is to provide a completely different function changeover that is not a changeover by changing a mask.

〔overview〕

The electronic timepiece of the present invention has a built-in KFROM inside the analog timepiece IC and the digital timepiece IC, and writes data into the necessary elements from the write terminal thereof, and selects and operates the function according to the content. It is characterized by

Another feature is that conversion to other functions can be easily realized.

〔Example〕

Hereinafter, the present invention will be described in detail based on examples.

(1) FIG. 1 shows an embodiment in which the usual pulse width of the analog timepiece IC of the present invention is switched using a FiPROM. 1 in the figure shows the 3-bit II! built-in XC to implement the present invention. FROM.

2 is a write terminal for writing data to FiPROM, 3, 4.5 is an output terminal of EFROM which is set to H1gh level or LOW level depending on the content of the written data, and 6 is a terminal from 1KH2 pulse. 7 is the input terminal for 512 HzM pulse, 8 is 256 Hz
M input terminal, 9 is 128Hz input terminal, 10 is 1
28 HzM input terminal, 11 is an IH2 pulse input terminal, 12 is a latch for outputting a hand movement pulse every second, and 13 is an output terminal for the hand movement pulse. The element within the dotted line 14 is a part of a decoder provided for selecting the hand movement pulse width. Depending on the data content written from the write terminal 2, 3, 4, 5. If the output terminal of is set to HIGH or LOW and has 3 bits, one of the a states can be selected. Depending on the state, part of the 14 decoders operates, and a hand movement pulse with a set pulse width is output from the 13 output terminal every second. Table 1 shows the needle passing pulse width 'fr: output according to the settings of terminals 3, 4, and 5. BFR
By increasing the number of bits of OM, more pulse widths can be set, and by changing part of the circuit of the decoder, pulse widths other than those shown in FIG. 2 can be freely created.

(2) Also, change the hand movement pulse interval from 1 second to 5 seconds.

When changing to 10 seconds, 20 seconds, etc., connect terminal 11 in Figure 1.
It is only necessary to input a desired pulse of 1 second, 5 seconds, 10 seconds, or 20 seconds to the pulse width, and the pulse width can be set by a combination of the FiPROM and a part of the decoder in the same way as the setting of the pulse width. FIG. 2 is an example of switching the pulse interval. In the figure, 15 is a 2-bit lPROM, 16 is its write terminal, 17.18 is an output terminal of the lPROM,
19 is an IHz pulse input terminal, 20, 21 e2
2 is '/s Hz '/1g Hz +
'/20 HZ pulse input terminal 25 is a selected pulse output terminal, which is input to terminal 11 in FIG. 2
4 is a part of the decoder. According to the data of the write terminal 16, the terminals 17 and 18 are set to HIGH or LOW, and the desired pulse is output from the output terminal 23.

(3) Furthermore, if the chronograph, alarm, timer, world time, etc. are switched off from the mask ROM to the lPROM in a multi-function watchmaker with a built-in CPU, mask changes are no longer necessary, and from the outside. It can be set by writing. Figure 3 is a block diagram of a multifunctional watch IC with a built-in CPU. By changing the ROM part in the figure from the conventional mask ROM to KFROM,
It is possible to easily switch the clock function. Figure 2
5 is a write terminal for setting the contents of the FfPROM. There is no need to change the mask at all, and since it is an EPROM, once written content can be easily erased, so even if an erroneous write occurs, it can be dealt with immediately.

Table 1 (sec) [Effects] As described above, according to the present invention, many functions can be changed without increasing the number of masks, and the EF
The second advantage of ROM is that it is erasable, so sudden changes in specifications by the user can be dealt with quickly.Furthermore, settings can be made by the user, making it easier to manage IC manufacturing. It has various effects of alleviating the problem of.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment in which the FiFROM of the present invention is applied to change the hand movement pulse width. FIG. 2 is an explanatory diagram showing the operation in FIG. 1. FIG. 2 is a circuit diagram showing an embodiment in which an EFROM is applied to change the interval between hand movement pulses. Figure 3 shows the EPROM of a multi-function watch IC with a built-in OPU.
FIG. 2 is a block diagram showing an example using the . Applicant: Suwa Seikosha Co., Ltd. Agent, Patent Attorney Mogami, Figure 1, Figure 2, Figure 3, Continuation Amendment (formula, ) 1. Indication of case If/l 1959 tu dispute 1 IPfi 59104 (
) 2 Title of the invention Electronic watch 3 Person making the amendment (256) Joreisha Sufatiseikosha 4 I (JI 11 people Hatashiki Nakamura Tsuneya June 26, 1981 Procedural amendment (method) 1. Specification 7 Delete the line 8 from the bottom that says "Figure 2 is an explanatory diagram showing the operation in Figure 1."

Claims (1)

[Claims] The clock part 0 has a built-in erasable and writable non-volatile memory (hereinafter referred to as 1pROM),
The switching of the clock function realized in the IPRO
An electronic clock characterized by using M.