JPS5470087A - Counter circuit with 12 hour display/24 hour display changeover function - Google Patents

Counter circuit with 12 hour display/24 hour display changeover function

Info

Publication number
JPS5470087A
JPS5470087A JP13741377A JP13741377A JPS5470087A JP S5470087 A JPS5470087 A JP S5470087A JP 13741377 A JP13741377 A JP 13741377A JP 13741377 A JP13741377 A JP 13741377A JP S5470087 A JPS5470087 A JP S5470087A
Authority
JP
Japan
Prior art keywords
circuit
counter circuit
hour display
hour
counter
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
Application number
JP13741377A
Other languages
Japanese (ja)
Inventor
Toshiaki Nozaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13741377A priority Critical patent/JPS5470087A/en
Publication of JPS5470087A publication Critical patent/JPS5470087A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses

Abstract

PURPOSE:To achieve the simplification of circuit constitution by making use of a ring type counter. CONSTITUTION:The counter circuit is constituted by a decimal counter crcuit 1 and binary counter circuits 2, 3 so that the hour pulses outputted from an ''hour'' pulse generating circuit 6 are counted. Then, when 12-hour display is performed by changing over a scale-of-12/24 control circuit 4 by the signal from a 12-hour display/24-hour display selection circuit 7, the duodecimal counter circuit which indicates the order of ''1'' with the decimal counter circuit 1 and the order of ''10'' with the binary counter circuit 2 is constituted and ''AN/PM'' is indicated by the binary counter circuit 3. If 24-hour display is selected, the decimal counter circuit 1 operates as a decimal counter circuit indicating the lower digits of the ''hour'' and the binary counter circuits 2, 3 operate as a counter circuit indicating the upper digits.
JP13741377A 1977-11-15 1977-11-15 Counter circuit with 12 hour display/24 hour display changeover function Pending JPS5470087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13741377A JPS5470087A (en) 1977-11-15 1977-11-15 Counter circuit with 12 hour display/24 hour display changeover function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13741377A JPS5470087A (en) 1977-11-15 1977-11-15 Counter circuit with 12 hour display/24 hour display changeover function

Publications (1)

Publication Number Publication Date
JPS5470087A true JPS5470087A (en) 1979-06-05

Family

ID=15198045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13741377A Pending JPS5470087A (en) 1977-11-15 1977-11-15 Counter circuit with 12 hour display/24 hour display changeover function

Country Status (1)

Country Link
JP (1) JPS5470087A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51100766A (en) * 1975-01-31 1976-09-06 Ebauches Sa

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51100766A (en) * 1975-01-31 1976-09-06 Ebauches Sa

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