JPS56679A - Electric power reducing system in time counting unit - Google Patents
Electric power reducing system in time counting unitInfo
- Publication number
- JPS56679A JPS56679A JP7503879A JP7503879A JPS56679A JP S56679 A JPS56679 A JP S56679A JP 7503879 A JP7503879 A JP 7503879A JP 7503879 A JP7503879 A JP 7503879A JP S56679 A JPS56679 A JP S56679A
- Authority
- JP
- Japan
- Prior art keywords
- time
- stop watch
- display
- counted
- gate
- 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
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
- G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
Abstract
PURPOSE:To reduce power consumption without damage of a stop watch time counting precision, by using high and low clocks for time count processing according to display and nondisplay of time count contents in the course of stop watch function operation. CONSTITUTION:At a stop watch operation time, AND gates 10 and 11 are opened through binary counter 9, and AND gate 15 is opened through FF13, and high-speed clocks of 1/10sec and so on from 1/10 frequency divider 19 are counted by ROM8 and operating circuit 22, and the count value is transferred to the register of RAM21 and is displayed on display part 26. When clear key 6 is operated under this state, AND gate 17 is opened through FF13, and gate 15 is closed, and low-speed clocks 1sec and so on of decimal counter 20 are selected and counted, and the count value is transferred to the register of RAM21, and the display on display part 6 is switched to the operation result corresponding to the operation of entry key 2 and function key 3. Since high-speed clocks are selected and counted only at this stop watch time display time, power consumption can be reduced without damage of the stop watch time counting precision.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7503879A JPS56679A (en) | 1979-06-14 | 1979-06-14 | Electric power reducing system in time counting unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7503879A JPS56679A (en) | 1979-06-14 | 1979-06-14 | Electric power reducing system in time counting unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56679A true JPS56679A (en) | 1981-01-07 |
JPS6239396B2 JPS6239396B2 (en) | 1987-08-22 |
Family
ID=13564626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7503879A Granted JPS56679A (en) | 1979-06-14 | 1979-06-14 | Electric power reducing system in time counting unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56679A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62182690A (en) * | 1986-02-06 | 1987-08-11 | Seiko Epson Corp | Electronic time-piece with stop watch function |
-
1979
- 1979-06-14 JP JP7503879A patent/JPS56679A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62182690A (en) * | 1986-02-06 | 1987-08-11 | Seiko Epson Corp | Electronic time-piece with stop watch function |
Also Published As
Publication number | Publication date |
---|---|
JPS6239396B2 (en) | 1987-08-22 |
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