JPH04182719A - Scanning controller - Google Patents

Abstract

PURPOSE:To use a same scanning controller even for a different matrix different in operation input function data and to reduce the number of parts by setting an operation input function based on the operation input function data read by a scanning means. CONSTITUTION:A scanning controller 1 reading a key matrix 8 provided with plural operation input means 5 is provided with a key scanning means 2, storage means 5 and 6, instruction input means 9a, 9b, SWa and SWB and control means 3 and 4. Plural kinds of operation input function data to be set for each operation input means 5 are stored in the storage means 5 and 6, any one of the plural kinds of operation input function data stored in the storage means 5 and 6 are indicated by the instruction input means 9a, 9b, SWa and SWb. The scanning means 2 scans the key matrix 8 and reads the operation input means 5, and the control means 3 and 4 sets the operation input function based on the operation input function data indicated by the instruction input means 9a, 9b, SWa and SWb. Thus, the scanning controller commonly usable for the key matrix 8 different in operation input functions is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION Overview A scanning control device that reads a key matrix including a plurality of operation input means stores a plurality of types of operation input function data set for each operation input means in a storage means. One type of operation input function data stored in the storage means is specified by the input means.

The scanning means reads the operation input means by scanning the key matrix, and the control means sets an operation input function to the operation input means based on the operation input function data instructed by the instruction input means.

Therefore, the same scanning control device can be used even when the operation input means require different operation input function data, and the number of parts can be reduced.

INDUSTRIAL APPLICATION FIELD The present invention relates to a scanning control device for controlling the operation of a key matrix.

BACKGROUND TECHNOLOGY ``When operations on operation keys provided in audio equipment are input to a microcomputer via a key matrix,
A microcomputer reads the contact point of the key matrix where an operation key is input, and outputs an operation signal corresponding to the contact point to the operating circuit.

Problems to be Solved by the Invention In the conventional technology, it is necessary to use a microcomputer that can read the operation input function data corresponding to the operation keys provided in the audio equipment. A computer must be created.

Therefore, there is a problem that there are many types of scanning control devices.

An object of the present invention is to provide a scanning control device that can be commonly used in key matrices with different operation input functions.

Means for Solving the Problems The present invention provides a scanning control device for reading a key matrix that includes a plurality of operation input means, which includes a scanning means for scanning the key matrix and operation input function data set for each operation input means. a storage means for storing a plurality of types of operation input function data; an instruction input means for instructing any one type of operation input function data of the plurality of types in the storage means; and an instruction input means for instructing the operation input means read by the scanning means. and a control means for setting an operation input function based on operation input function data.

Operation According to the present invention, a scanning control device for reading a key matrix including a plurality of operation input means includes a scanning means, a storage means, an instruction input means, and a control means.

A plurality of types of operation input function data set for each operation input means are stored in the storage means, and any one of the plurality of types of operation input function data stored in the storage means is instructed by the instruction input means. Ru. The scanning means scans the key matrix and reads the operation input means;
The control means sets the operation input function based on the operation input function data instructed by the instruction input means.

Embodiment FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of the read-only memory 5 shown in FIG. 1.

Scanning lines KRO to KR connected to control circuit 1
A key matrix 8 is formed by the segment lines KSO to KS3 (when collectively referred to as KR) and segment lines KSO to KS3 (when collectively referred to as KS). The control circuit 1 includes an instruction input means. A common terminal 9a of a switch SW a such as a bit switch, etc., and a switch SW such as a bit switch, which is an instruction input means.
b is connected to the common terminal 9b. Switch SW
The individual terminal 11a of the switch SWb and the individual terminal 11b of the switch SWb are connected to the power supply potential VO, and the individual terminal 11a of the switch SWb
The individual terminal 12a of Wa and the individual terminal 12b of switch SWb are connected to the ground potential.

Common terminal 9a of switch S W a and switch Sw
The common terminal 9b of the control circuit 1 is connected to the power supply potential ■0 or the ground potential by the switches SWa and SWb, and the common terminal 9b of the control circuit 1
Input a high level or low level signal to the Further, the control circuit 1 is connected to an operation circuit 7 that performs an operation recognized by the control circuit 1.

The control circuit 1 includes a key scanning section 2 which is a scanning means, a CPU 3 which is a control means, a random access memory (hereinafter referred to as RAM) 4, and a read only memory (hereinafter referred to as R) which is a storage means.
(denoted as OM) 5 and an output buffer 6. The key scanning unit 2 scans the key matrix 8. The addresses of the intersections of the key matrix read by the key scanning section 2 are stored in the RAM 4 via the CPU 3 until scanning of all the intersections of the key matrix 8 is completed. When the scanning of all the intersection points is completed, the CPU 3 reads the scanning corresponding to the address of the intersection point from the ROM 5.

The ROM 5 has four storage areas 5a, 5b, and 5c.

5d, each storage area 5a, 5b.

Operations corresponding to different key matrices 8 are stored for each of 5c and 5d. The operations of the key matrix 8 stored in the storage area 5a are stored in the matrix 1, the operations stored in the storage area 5b are stored in the matrix 2, the operations stored in the storage area 5c are stored in the matrix 3, and the operations stored in the storage area 5d are stored in the matrix 1. Matrix 4 is the operation in question. The CPU 3 selects one of the storage areas 5a, 5b, 5c, and 5d according to the combination of signals input to the control circuit 1 from the common terminals 9a and 9b, and selects the address of the key matrix 8 read by the key scanning unit 2 from there. Read the operation corresponding to .

Table 1 shows the matrix selected for the combination of signals input to the control circuit 1 from the common terminals 9a and 9b.

Table 1 Matrix 1 is selected when a high level signal is input from the common terminal 9b while a high level signal is input from the common terminal 9a, and matrix 2 is selected when a low level signal is input. , common terminal 9a
When a low-level signal is input from the common terminal 9b, matrix 3 is selected, and when a low-level signal is input, matrix 4 is selected.

Table 2 shows operations corresponding to each intersection of key matrix 8 stored in matrix 1, and Table 3 shows operations corresponding to each intersection of key matrix 8 stored in matrix 2.

Table 2 (margins below) Table 3 In matrix 1, no operations are stored at the intersections of scanning line KRO and segment line KS3 and at the intersections of scanning line KR3 and segment line KSO.

The intersection of scanning line KRI and segment line KS3 is for taking out the tape, and the intersection of scanning line KR2 and segment line KS3 is for FM or AM, scanning line KR.
3 and segment line KS3, and a tape cassette selection operation is stored at the intersection of scanning line KRO and segment line KS2.

The operation for receiving traffic information is stored at the intersection of the scanning line KRI and the segment line KS2.
An automatic radio tuning operation is stored at the intersection of R2 and segment line KS2.

Channel 1 is at the intersection of scan line KR3 and segment line KS2, channel 2 is at the intersection of scan line KRO and segment line KSI, channel 3 is at the intersection of scan line KRI and segment line KSI, and channel 3 is at the intersection of scan line KR2 and segment line KSI. At the intersection with line KSI, channel 4, scanning line KR3 and segment line K
A radio station selection operation corresponding to channel 5 is stored at the intersection with SI, and a radio station selection operation corresponding to channel 6 is stored at the intersection between scanning line KRO and segment line KSO.

An operation for increasing the receiving frequency is stored at the intersection between the scanning line KRI and the segment line KSO, and an operation for decreasing the receiving frequency is stored at the intersection between the scanning line KR2 and the segment line KSO.

In matrix 2, AM is located at the intersection of scanning line KR2 and segment line KS3, tape cassette is located at the intersection of scanning line KR3 and segment line KS3, and FM is located at the intersection of scanning line KRO and segment line KS2.
The selection operations of matrix 1 are stored, and the stored contents differ from matrix 1 at these intersections.

C from the storage areas 5a, 5b, 5c, 5d according to the input signals from the common terminals 9a, 9b of the switches SWa, SWb.
The PU 3 reads the operations corresponding to the intersections of the key matrix 8 as parallel data and sets it in the output buffer 6. The parallel data set in the output buffer 6 is
The data is input to the operation circuit 7 as serial data, and the operation circuit 17 performs an operation according to the input data.

FIG. 3 is a flowchart showing the operation of one embodiment of the present invention. In step a1, manual key processing is performed, and the input address of the key matrix 8 is read by scanning by the key scanning section 2. In step a2, it is determined whether or not the common terminal 9a of the switch S W a is at a high level. If the common terminal 9a is at a high level, it is determined in step a3 whether or not the common terminal 9b of the switch swb is at a high level. If the level is high, it is set to matrix 1 in step a4, and if it is low level, it is set to matrix 2 in step a5. When the common terminal 9a is at a low level in step a2, the common terminal 9b is at a low level in step a6.
It is determined whether or not the common terminal 9b is at a high level, and when the common terminal 9b is at a high level, it is set in matrix 3 in step a7, and when it is at a low level, it is set in matrix 4 in step a8. Step a4. a5゜a7. When the matrix is set in step a8, the operation corresponding to the address read by the scanning section 2 is read from the matrix set in step a9, set in the output buffer 6, and then transferred to the operation circuit 7.

According to this embodiment as described above, the control circuit 1 of the key matrix 8 has the common terminal 9 of the switches SWa and SWb. a,
By inputting a signal from 9b, R of the control circuit 1
A plurality of memories stored in OM5 are selected. Therefore, key matrices 8 that perform different operations can be controlled by the same control circuit 1. Therefore, the same scanning control device can be used in key matrices requiring different operation input function data required by the operation input means, and the number of parts can be reduced.

In this embodiment, the control circuit 1 includes two switches SW.
a, SWb is connected, but switches swa and SWb are 1
The same effect can be obtained with three or more. In this case, it is necessary to provide a number of storage areas in the ROM 5 according to the number of switches connected to the control circuit 1.

Effects of the Invention According to the present invention, a plurality of types of operation input function data are stored in the storage means, and the instruction input means instructs one type of operation input function data.

The control means sets an operation input function to the operation input means read by the scanning means based on the operation input function data instructed by the instruction input means. Therefore, the same scanning control device can be used in key matrices requiring different operation input function data required by the operation input means, and the number of parts can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the read-only memory 5 shown in FIG. 1, and FIG. 3 is a flowchart showing the operation of one embodiment of the present invention. be. l...Control circuit, 2...Key scanning unit, 3...CP
U, 5...Read-only memory, 8...Key matrix, 9a, 9b...Common terminal agent Patent attorney Number of strokes Keiichi

Claims (1)

[Claims] A scanning control device for reading a key matrix, which includes a plurality of operation input means, comprising a scanning means for scanning the key matrix, and a plurality of types of operation input function data set for each operation input means. A storage means for storing, an instruction input means for instructing any one type of operation input function data of the plurality of types of operation input function data of the storage means, and an operation instructed by the instruction input means read by the scanning means. A scanning control device comprising: a control means for setting an operation input function based on input function data.