JP2008262443A5 - - Google Patents
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- Publication number
- JP2008262443A5 JP2008262443A5 JP2007105557A JP2007105557A JP2008262443A5 JP 2008262443 A5 JP2008262443 A5 JP 2008262443A5 JP 2007105557 A JP2007105557 A JP 2007105557A JP 2007105557 A JP2007105557 A JP 2007105557A JP 2008262443 A5 JP2008262443 A5 JP 2008262443A5
- Authority
- JP
- Japan
- Prior art keywords
- watchdog timer
- resistance value
- circuit
- value
- sensor
- 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.)
- Withdrawn
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- 230000001133 acceleration Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 claims 1
- 238000004904 shortening Methods 0.000 claims 1
Claims (6)
このタイマ回路に外付けされ、当該タイマ回路のタイムアウト時間を設定している抵抗およびコンデンサからなる積分回路と、
前記ＣＰＵによって制御される被制御機器又は当該被制御機器を構成する部品の状態を検出するセンサと、
このセンサの出力に基づき前記積分回路の抵抗値を少なくとも２段階に切り替える抵抗値切り替え回路とを有していることを特徴とするウオッチドックタイマ。 A timer circuit that is reset by a retrigger signal input at a constant cycle from the CPU;
An integrating circuit consisting of a resistor and a capacitor that is externally attached to the timer circuit and sets the timeout time of the timer circuit,
A sensor for detecting a state of a controlled device controlled by the CPU or a component constituting the controlled device;
A watchdog timer comprising: a resistance value switching circuit that switches the resistance value of the integrating circuit in at least two stages based on an output of the sensor.
前記センサは、前記被制御機器又は当該被制御機器を構成する部品の発熱量、発光量、圧力、電圧、電流、位置、速度および加速度のうちの少なくとも一つの状態を検出するものであることを特徴とするウオッチドックタイマ。 The watchdog timer according to claim 1,
The sensor detects at least one state of a calorific value, light emission amount, pressure, voltage, current, position, speed, and acceleration of the controlled device or a component constituting the controlled device. Features a watchdog timer.
前記抵抗値は第１の値に初期設定されており、
前記抵抗値切り替え回路は、前記センサの出力レベルが予め定めた値を超えると、前記抵抗値を前記第１の値よりも小さな第２の値に切り替えて、前記タイマ回路のタイムアウト時間を短い時間に切り替えることを特徴とするウオッチドックタイマ。 The watchdog timer according to claim 1 or 2,
The resistance value is initially set to a first value,
When the output level of the sensor exceeds a predetermined value, the resistance value switching circuit switches the resistance value to a second value smaller than the first value, thereby shortening the time-out time of the timer circuit. Watchdog timer characterized by switching to.
前記積分回路の前記抵抗に並列接続されており、前記被制御機器の温度に応じて抵抗値が変化する感熱素子を有し、
当該感熱素子が、前記センサおよび前記抵抗値切り替え回路として機能することを特徴とするウオッチドックタイマ。 In the watchdog timer according to any one of claims 1 to 3,
A thermal element that is connected in parallel to the resistor of the integrating circuit and has a resistance value that changes according to the temperature of the controlled device,
The watchdog timer, wherein the thermal element functions as the sensor and the resistance value switching circuit.
前記積分回路の前記抵抗に、スイッチングトランジスタを介して並列接続された付加抵抗を有し、
前記抵抗値切り替え回路は、前記センサの出力レベルが予め定めたしきい値を上回った場合あるいは下回った場合に、前記スイッチングトランジスタをオンして前記積分回路の抵抗値を低い値に切り替えることを特徴とするウオッチドックタイマ。 The watchdog timer according to claim 3,
An additional resistor connected in parallel via a switching transistor to the resistor of the integrating circuit;
The resistance value switching circuit turns on the switching transistor and switches the resistance value of the integrating circuit to a low value when the output level of the sensor exceeds or falls below a predetermined threshold value. Watchdog timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007105557A JP2008262443A (en) | 2007-04-13 | 2007-04-13 | Watchdog timer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007105557A JP2008262443A (en) | 2007-04-13 | 2007-04-13 | Watchdog timer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2008262443A JP2008262443A (en) | 2008-10-30 |
| JP2008262443A5 true JP2008262443A5 (en) | 2010-04-30 |
Family
ID=39984861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007105557A Withdrawn JP2008262443A (en) | 2007-04-13 | 2007-04-13 | Watchdog timer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2008262443A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5195318B2 (en) * | 2008-11-07 | 2013-05-08 | セイコーエプソン株式会社 | Motor control apparatus, recording apparatus, and motor control method |
| JP2021056653A (en) | 2019-09-27 | 2021-04-08 | 富士ゼロックス株式会社 | Information processing device and information processing program |
-
2007
- 2007-04-13 JP JP2007105557A patent/JP2008262443A/en not_active Withdrawn
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