JPS60167018A - Resetting device - Google Patents

Resetting device

Info

Publication number
JPS60167018A
JPS60167018A JP60001615A JP161585A JPS60167018A JP S60167018 A JPS60167018 A JP S60167018A JP 60001615 A JP60001615 A JP 60001615A JP 161585 A JP161585 A JP 161585A JP S60167018 A JPS60167018 A JP S60167018A
Authority
JP
Japan
Prior art keywords
switches
reset
microcomputer
command
resetting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP60001615A
Other languages
Japanese (ja)
Other versions
JPS6253848B2 (en
Inventor
Noriyuki Sakamoto
坂本 徳行
Fuminori Hirose
文則 広瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60001615A priority Critical patent/JPS60167018A/en
Publication of JPS60167018A publication Critical patent/JPS60167018A/en
Publication of JPS6253848B2 publication Critical patent/JPS6253848B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To perform resetting operation securely without requiring any special program by connecting plural reset switches which operate associatively with plural command switches between a resetting point in a network and a specific potential point in series. CONSTITUTION:Switches S1, S3, and S5 among command switches S1-S5 are each composed of two mutually associative circuit switches, i.e. S1-1, S1-2, S3-1, S3-2, S5-1, and S5-2. The switches S1-1, S3-1, and S5-1 are operated so as to supply specific commands similarly to other command switches S2 and S4, and the switches S1-2, S3-2, and S5-2 are connected between the reset terminal 1a of a microcomputer 1 and the ground. Then, the switches S1-S5 are closed independently to supply the specific commands to the microcomputer 1, and the reset terminal 1a is grounded only when the switches S1, S3, and S5 are closed at the same time, thereby resetting the microcomputer 1.

Description

【発明の詳細な説明】 本発明はマイクロコンピュータ等の電子回路を初期状態
に設定するためのリセット装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reset device for setting an electronic circuit such as a microcomputer to an initial state.

マイクロコンピータを用いる機器においては、動作を開
始する前にマイクロコンピュータをリセットし、プログ
ラムを初期状態に戻す必要がある。
In devices that use a microcomputer, it is necessary to reset the microcomputer and return the program to its initial state before starting operation.

このため、従来より、第1図に示すようにマイクロコン
ピュータ1のリセット端子1&を電源ライ/2とアース
問に接続され抵抗RとコンデンサCの接続点に接続し、
電源投入時、電源ライン2の電位が第2図aに示すよう
に瞬時に立上るのに対して゛、リセット端子1aの電位
を第2図すに示すように抵抗RとコンデンサCで決まる
時定数にしたがってゆるやかに立上らせ、両電位a、b
の立上り時間差を利用してリセット端子1aを瞬間的に
L”レベルにしてマイクロコンピュータ1をリセットす
るようにしている。ところが、この場合に′は電源の立
上り時に一度電圧が下がったりするいわゆるチャタリン
グによる誤動作が生じ、確実にリセットできない場合が
ある。
For this reason, conventionally, as shown in FIG. 1, the reset terminal 1 & of the microcomputer 1 is connected between the power line /2 and the ground, and is connected to the connection point between the resistor R and the capacitor C.
When the power is turned on, the potential of the power supply line 2 rises instantaneously as shown in Figure 2a, whereas the potential of the reset terminal 1a rises at a time constant determined by the resistor R and capacitor C as shown in Figure 2. The potentials a and b are raised slowly according to
The reset terminal 1a is instantaneously set to L'' level to reset the microcomputer 1 using the rise time difference between . A malfunction may occur and it may not be possible to reset reliably.

これを防止するためには、手動で操作されるリセット釦
を設け、このリセット釦によってリセットスイッチを閉
じ、マイクロコンピュータ1のリセット端子1aを所定
の電位点(たとえばアース)に接続するようにしてもよ
いが、特にメモリー機能をもつ場合には、誤ってリセッ
ト釦を操作するとメモリーされた内容自体が消されてし
まうおそれもあり、そのためリセット釦を機器の裏側な
ど操作しにくい場所に設ける必要があり、その結果リセ
ット操作自体を忘れてし1うという不都合がある。
In order to prevent this, a manually operated reset button may be provided, which closes the reset switch and connects the reset terminal 1a of the microcomputer 1 to a predetermined potential point (for example, ground). However, especially if the device has a memory function, there is a risk that the stored contents will be erased if the reset button is pressed by mistake, so it is necessary to place the reset button in a place that is difficult to operate, such as on the back of the device. As a result, there is an inconvenience that the reset operation itself may be forgotten.

もちろん、第3図に示すようにマイクロコンピュータ1
に3つのリセット端子1a、1b、1cを設け、これら
3つのリセット端子1a 、1b、1cに3個のリセッ
トスイッチ3,4.5を接続し、これら3つのスイッチ
を同時に閉じたときのみリセットがかかるようにするこ
とも考えられる。このようにすればスイッチ3,4.5
のリセット釦を機器の前面に配置しても誤操作のおそれ
はなく、またリセットのかけ忘れも防止できるが、この
ときKはマイクロコンピュータ1内にスイッチ3゜4.
6の開閉状態を識別する特別なプログラムを組込まなけ
ればならないという新たな問題が発生する。
Of course, as shown in Figure 3, the microcomputer 1
Three reset terminals 1a, 1b, 1c are provided in the , and three reset switches 3, 4.5 are connected to these three reset terminals 1a, 1b, 1c, and a reset is performed only when these three switches are closed at the same time. It is also conceivable to do so. In this way, switches 3, 4.5
Even if the reset button is placed on the front of the device, there is no risk of erroneous operation, and it also prevents forgetting to reset it.
A new problem arises in that a special program must be installed to identify the open/closed state of 6.

本発明はこのような問題を解決するリセット装置を提供
するものである。
The present invention provides a reset device that solves these problems.

以下本発明の一実施例を第4図とともに説明する。An embodiment of the present invention will be described below with reference to FIG.

第4図において、81〜S5はマイクロコンビ、−夕1
にデータの書き込み、読み出し等の所定の指令を与える
ための指令スイッチであり、このうちスイッチS1 、
S3 、S6は互に連動する2回路のスイッチ5SS 1−11 1−2+3−11 3−2 lチS2.S4
と同様に所定の指令を与えるためのスイッチとして動作
し、他方のスイッチ”1−2゜53−2 、”5−2は
、マイクロコンピュータ1のリセット端子1aとアース
間に直列に接続されている。
In Fig. 4, 81 to S5 are microcombi, -Y1
These are command switches for giving predetermined commands such as writing and reading data to the switch S1.
S3 and S6 are mutually interlocking two-circuit switches 5SS 1-11 1-2+3-11 3-2 lchS2. S4
The other switches ``1-2゜53-2'' and ``5-2'' are connected in series between the reset terminal 1a of the microcomputer 1 and the ground. .

」二記構成において、スイッチ81 〜S6 をそれぞ
れ単独に閉じれば、マイクロコンビ、−plに所定の指
令を与えることができ、スイッチS1゜S3.S6を同
時に閉じたときのみリセット端子1aがアースに接続さ
れ、マイクロコンピュータ1がリセットされる。
2 configuration, if the switches 81 to S6 are individually closed, a predetermined command can be given to the microcombi, -pl, and the switches S1, S3, . Only when S6 is closed at the same time, the reset terminal 1a is connected to ground, and the microcomputer 1 is reset.

このように゛本発明によれば、 (1)スイッチの手動操作によってリセットをかけるこ
とができるから、電源の立上りを利用するものに比べて
リセット動作を確実にすることができる。
As described above, according to the present invention, (1) Since the reset can be performed by manual operation of the switch, the reset operation can be performed more reliably than when the power supply is turned on.

(2)電子回路のり七ノドポイントを直接所定の電位点
に接続してリセットをかけるものであるから、複数のス
イッチの開閉状態を識別するためのプログラムも不要に
なる。
(2) Since the seven node points of the electronic circuit are directly connected to predetermined potential points for resetting, there is no need for a program to identify the open/closed states of the plurality of switches.

(3)複数のスイッチが同時に閉じたときだけリセット
がかかるから、リセット釦を機器の前面等に設けても誤
ってリセットしたり、リセットし忘れたりするおそれが
なくなる。
(3) Since the reset is activated only when a plurality of switches are closed at the same time, there is no risk of erroneously resetting or forgetting to reset even if the reset button is provided on the front of the device.

(4) リセット用のスイッチが指令スイッチと連動し
ているから、リセット釦を指令釦で兼用することができ
、したがって部品の取付スペースの点でも有利になる。
(4) Since the reset switch is interlocked with the command switch, the reset button can also be used as the command button, which is advantageous in terms of mounting space for parts.

という優れた効果が得られる。This excellent effect can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来例の回路図、第2図はその動作説明図、第
3図は他の従来例の回路図、第4図は本発明の一実施例
の回路図である。 1・旧・・マイクロコンピュータ、1a・・印・リセッ
ト端子、2・・・・・・電源ライン、S、5s1−12
’3−II 84185−1 ”””指令スイッチ、5s1−213
−21 85−2・山・・リセットスイッチ。 代理人の氏名 弁理士 中 尾 敏 男 はが1名第1
図 ? 第2図 α □を 第3図 第4図
FIG. 1 is a circuit diagram of a conventional example, FIG. 2 is an explanatory diagram of its operation, FIG. 3 is a circuit diagram of another conventional example, and FIG. 4 is a circuit diagram of an embodiment of the present invention. 1.Old...Microcomputer, 1a...mark/Reset terminal, 2...Power line, S, 5s1-12
'3-II 84185-1 """ Command switch, 5s1-213
-21 85-2・Mountain・・Reset switch. Name of agent: Patent attorney Toshio Nakao (1st person)
figure? Figure 2 α □ Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 回路網中のりセントポイントを所定の電位点に接続した
とき、この回路網を初期状態にリセットするように構成
した電子回路と、上記電子回路に所定の動作を指令する
複数の指令スイッチと、上記複数の指令スイッチに連動
する複数のリセットスイッチとを備え、上記複数のリセ
ットスイッチを、上記回路網中のリセットポイントと上
記所定の電位点との間に直列に接続したリセット装置。
an electronic circuit configured to reset the circuit network to an initial state when a cent point in the circuit network is connected to a predetermined potential point; a plurality of command switches that command the electronic circuit to perform a predetermined operation; A reset device comprising a plurality of reset switches interlocked with a plurality of command switches, the plurality of reset switches being connected in series between a reset point in the circuit network and the predetermined potential point.
JP60001615A 1985-01-09 1985-01-09 Resetting device Granted JPS60167018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60001615A JPS60167018A (en) 1985-01-09 1985-01-09 Resetting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60001615A JPS60167018A (en) 1985-01-09 1985-01-09 Resetting device

Publications (2)

Publication Number Publication Date
JPS60167018A true JPS60167018A (en) 1985-08-30
JPS6253848B2 JPS6253848B2 (en) 1987-11-12

Family

ID=11506417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60001615A Granted JPS60167018A (en) 1985-01-09 1985-01-09 Resetting device

Country Status (1)

Country Link
JP (1) JPS60167018A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03127937U (en) * 1990-03-31 1991-12-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03127937U (en) * 1990-03-31 1991-12-24

Also Published As

Publication number Publication date
JPS6253848B2 (en) 1987-11-12

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