JPS5934293A - Stitch pattern indicator circuit of sewing machine - 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 The present invention relates to a stitch pattern command circuit for an electronic sewing machine which stores pattern data in a semiconductor memory element and sequentially reads out the data to sew a pattern.

A conventional circuit of this type is shown in FIG. In the figure, (1) is an 8-bit microcomputer, (
2; is a semiconductor memory element that stores pattern data, and is designed to be replaceable. (3) is composed of 16 bits and is an address line for specifying the data storage location of the semiconductor memory element (2); +41 is composed of 8 bits and is stored in the memory location specified by the address line. This is a data line for outputting data.

Next, the operation will be explained. Microcomputer (1
) is the data read cycle, the address lines from Ao to A15 initially become 0000000000000000 and are addressed to the first address of the semiconductor memory element (2),
The data stored at this address is output to the data lines D[] to D7 and read by the microcomputer (2;).Then, a -7 address signal is output to the address line in order, and this address is buttressed with a number. The data stored at the address is output to the data line of DQ-D7 and read by the microcomputer (2:).

In this way, the data was stored in the semiconductor memory element (2).

For example, the pattern data for sewing 'x = r-(black computer (2)) can be read.

The semiconductor memory element (2) has a replaceable structure, and for hot sewing with different pattern data, it is only necessary to select the semiconductor memory element that has stored the pattern data. The storage and data reading circuits are constructed as described above, and the semiconductor memory element (2) is replaced to accommodate two different types of pattern data. However, there are currently many types of semiconductor memory elements, and although there is a trend toward the development of larger memory capacity and lower-priced ones in the future, the conventional circuit described above is limited to only one type that is currently available. The disadvantage is that only 100% of semiconductor memory elements can be used.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional device, and includes a keyword data storage device at a predetermined address of a semiconductor memory device that stores pattern data for identifying the type of this semiconductor memory device. Then, before reading the pattern data, this keyword is determined to determine the type of semiconductor memory element, and after making a logical connection suitable for this type.

The object of the present invention is to provide a circuit that is configured to read the stored pattern data, thereby automatically discriminating pattern data stored in different types of semiconductor memory elements and reading out the correct pattern data. It is said that

An embodiment of the present invention will be described below with reference to the drawings. Second
In the figure, (1) to (4) indicate the same or equivalent parts as in FIG. 1. Qυ is a logic circuit that changes the connection of address signals depending on the type of semiconductor memory element (2).

@ indicates a switching signal line for switching the connection of the logic circuit e21), and @ indicates an address line after the connection switching has been performed.

FIG. 3 shows another specific embodiment of this invention (
31) is an iR element, (32) is a switching signal line, (Akira)
is the address line after switching has taken place.

Next, the operation will be explained with reference to FIG.

The semiconductor memory element (2) has a keyword for determining the type stored at its first address. It is now assumed that the first type of memory element stores the keyword AA, and the second type of memory element stores the keyword B)3.A microcomputer (1) has the first type of keyword AA stored in the first type of memory element, and the keyword ``B)3'' stored in the second type of memory element. A switching signal for addressing the type of semiconductor memory element (2) is output and applied to the logic circuit Qυ.The logic circuit QD switches the connection of the address line (3) according to the switching signal, and connects the address line (c) to the first one. The type of semiconductor memory element (2) is set to be correctly addressed.Next, the microcomputer (from 11 to the first address oooo ooo.

Address address oooo oooo. At this time, if the keyword AA is output to the data line DQ-D7, the semiconductor memory element (2) is a first type of memory element.

The pattern data can be read out continuously.

At this time, if the second type of memory element is set in the semiconductor memory element (2), the keyword AA will not be output to the data lines DO to D7, and the keyword BB may be output. No, because logic circuit Q
This is because υ is connected only to address the first type of storage element, and therefore the second type of storage element cannot be correctly addressed. That is, if AA is output to the data line DQ-D7 by the logic circuit (211) whose connection has been changed to address the first type of memory element, reading of the pattern data is executed as is, and if AA is not output, the micro Computer (11 is terminal Q o~(!2
A switching signal for addressing the second (7,) type of semiconductor memory element (2:) is output to the logic circuit (21), and the second type of memory element is correctly connected to the address line (c). Then, as before, when the microcomputer (1) sends the start address oooo oooo oooo oooo address 1-, the data line Do~1)7 has the keyword BB.
is output.

It can be determined that the semiconductor memory element (2) has been set.

FIG. 3 shows another more specific embodiment, and a case will be described in which a memory element 12γ16 and a memory element 2132 manufactured by Intel Corp., which are currently commonly used as the semiconductor memory element (2), are used.

12116 has a storage capacity of 7 and has a storage capacity of 2 KB. Address lines from AO to AiO are valid, and All must be fixed at +5V, that is, logic "H". Also, 12732 is 4KB
It has a storage capacity of 7, and address lines AQ to A11 are valid.

Now, AA is stored at address 1271600, and 12732
1. Store BBY at address 0. Now, when the microcomputer (11) supplies the terminal CD VC logic II H" signal to the gR element (31) through the switching signal line (32), the address line (30) A11 is always "H".
This results in a state in which 12716 is addressed.

At this time, from the microcomputer (1) to the address line (
When oooo oooooo is output to 33), the start address of the semiconductor memory element (2) is set, and 12 is output here.
If 716 is counted, the data is I%! AA is output to DO~D7 and microcomputer (1) is 1271
It judges that 6 is not set and continues to address the pattern data.However, when AA is output and is not present, the microcomputer (1) outputs a logic "L" to the terminal CO and the 96R element (port 1). The output is set at 11H" at all times, and the output 3 changes according to the state of the input terminal 2, that is, it is set to a state where it can be addressed when 12732 is set in the semiconductor memory element (2). In this state, the microcomputer (11H) ooo from address line (33)
Output o oooo ooo.

It can be determined that 12732 is set in the semiconductor memory element (2) by reading the output data of BB on the data line DQ-D7.

As described above, according to the present invention, since the device is configured to automatically determine which volatile semiconductor memory element is set in the device, it is possible to use any currently commercially available semiconductor memory element. You can also do that.

Furthermore, conventionally developed elements can also be used.

A device with extremely high flexibility can be obtained.

Furthermore, as seen in the examples (by realizing it with a simple circuit configuration, it is possible to obtain an inexpensive and highly reliable circuit).

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a conventional example, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a circuit diagram showing another specific embodiment of the invention. In the figure (1)
is a microcomputer, (2) is a semiconductor memory element, (
3) is an address line, and (4) is a data line. 0υ is the logic circuit, (2) is the switching signal line, (to) is the address line after switching, (31) is the daR element, (32
) is a switching signal line. (53) is the address line after switching. Agent Shin Kuzuno - Tsuyu 11! ! Atsushi 2! ! 1 22 113 Figure 2 Showa year month day q, 'i Director-General 1, "IT fi display IJl' request 1984-1
44203 No. 2 Invention (7) Name fF Stitch pattern command circuit 3 of electronic sewing machine, relationship with each correction/IT matter Patent applicant No. 4, 'i 5 Beak No. Knee 1 5, Subject of amendment In the details of the invention in the specification, in column 6 of RJ3, in the content of the amendment, on page 8, line 9 of the specification reproduction, the word ``engaged j'' is replaced with ``in the future.''
I am corrected. Below

Claims (1)

[Claims] a replaceable storage element having a storage section for stitch pattern data and type identification data; means for first reading type identification data from this storage element and then reading stitch pattern data; A stitch pattern command circuit for an electronic sewing machine, comprising means for determining the type of a storage element based on a corresponding signal and making a logical connection suitable for the storage element.