JPS6473410A - Clock detection circuit - Google Patents
Clock detection circuitInfo
- Publication number
- JPS6473410A JPS6473410A JP62229692A JP22969287A JPS6473410A JP S6473410 A JPS6473410 A JP S6473410A JP 62229692 A JP62229692 A JP 62229692A JP 22969287 A JP22969287 A JP 22969287A JP S6473410 A JPS6473410 A JP S6473410A
- Authority
- JP
- Japan
- Prior art keywords
- clock
- interruption
- pulse
- generated
- preset value
- 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.)
- Pending
Links
Landscapes
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE:To immediately detect that even the clock with a short period is not inputted by detecting the interruption of the clock when a pulse is counted up to a previously set preset value while the clock is not generated by a counting means to be reset at every time the clock is generated. CONSTITUTION:A pulse generating means 41 to output the pulse at the prescribed period, and the counting means 37 which is reset at every time the clock is generated and detects the interruption of the clock when it counts the pulse up to the previously set preset value while the clock is not generated, are provided. Because the pulse generating means 41 can change the period of the pulse to be outputted as well, it can quickly detect the interruption of the clock even in the case of the same preset value. Namely, by changing the preset value of the counter 37, time till the interruption of the clock is detected can be changed freely. Thus, whatever period the clock has, the interruption of the input of the clock can be detected immediately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62229692A JPS6473410A (en) | 1987-09-16 | 1987-09-16 | Clock detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62229692A JPS6473410A (en) | 1987-09-16 | 1987-09-16 | Clock detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6473410A true JPS6473410A (en) | 1989-03-17 |
Family
ID=16896207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62229692A Pending JPS6473410A (en) | 1987-09-16 | 1987-09-16 | Clock detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6473410A (en) |
-
1987
- 1987-09-16 JP JP62229692A patent/JPS6473410A/en active Pending
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