JPS59175193U - timing circuit - Google Patents
timing circuitInfo
- Publication number
- JPS59175193U JPS59175193U JP6883383U JP6883383U JPS59175193U JP S59175193 U JPS59175193 U JP S59175193U JP 6883383 U JP6883383 U JP 6883383U JP 6883383 U JP6883383 U JP 6883383U JP S59175193 U JPS59175193 U JP S59175193U
- Authority
- JP
- Japan
- Prior art keywords
- clock
- lsi
- input clock
- frequency
- timer
- 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
Links
Landscapes
- Measurement Of Unknown Time Intervals (AREA)
- Electric Clocks (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図面は、本考案の具体的実施例を示すものである。
1:基準周波数発振器、2,3:分周器、4:1秒未満
計時部、5:時計用LSI、5 、BUSY信号、7:
インターフェース部、8:マイクロプロセッサバス。
イThe drawings illustrate specific embodiments of the invention. 1: Reference frequency oscillator, 2, 3: Frequency divider, 4: Less than 1 second timer, 5: Clock LSI, 5, BUSY signal, 7:
Interface section, 8: Microprocessor bus. stomach
Claims (1)
つの分周器で、ひとつを1秒単位で計時する万年時計用
LSIの作動周波数、他方をlHzより高い所定の周波
数になるよう分周し、前者を前記時計用LSIの入力ク
ロック、後者を1秒未満計時部の入力クロックとし、前
記時計用LSIが発するBUSY信号によって1秒未満
計時部の計時数をクリアすることを特徴とする計時回路
。The pulses generated by the reference frequency oscillator are divided into two with different frequency division ratios.
One frequency divider is used to divide the operating frequency of a perpetual clock LSI that measures time in units of one second, and the other is divided to a predetermined frequency higher than 1Hz.The former is used as the input clock of the clock LSI, and the latter is 1. A timekeeping circuit, characterized in that the input clock of the less-than-one-second timer is an input clock, and the time count of the less-than-one-second timer is cleared by a BUSY signal generated by the clock LSI.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6883383U JPS59175193U (en) | 1983-05-07 | 1983-05-07 | timing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6883383U JPS59175193U (en) | 1983-05-07 | 1983-05-07 | timing circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59175193U true JPS59175193U (en) | 1984-11-22 |
JPS64634Y2 JPS64634Y2 (en) | 1989-01-09 |
Family
ID=30199002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6883383U Granted JPS59175193U (en) | 1983-05-07 | 1983-05-07 | timing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59175193U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5119002B2 (en) * | 2008-02-29 | 2013-01-16 | シチズン時計株式会社 | Clock circuit and electronic clock |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5571978A (en) * | 1978-11-24 | 1980-05-30 | Hitachi Ltd | Electronic multiple function watch |
JPS55113783A (en) * | 1972-11-06 | 1980-09-02 | Merck & Co Inc | Novel antibiotic |
-
1983
- 1983-05-07 JP JP6883383U patent/JPS59175193U/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55113783A (en) * | 1972-11-06 | 1980-09-02 | Merck & Co Inc | Novel antibiotic |
JPS5571978A (en) * | 1978-11-24 | 1980-05-30 | Hitachi Ltd | Electronic multiple function watch |
Also Published As
Publication number | Publication date |
---|---|
JPS64634Y2 (en) | 1989-01-09 |
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