JPS57173783A - Watch circuit with unvolatile memory - Google Patents

Watch circuit with unvolatile memory

Info

Publication number
JPS57173783A
JPS57173783A JP6002181A JP6002181A JPS57173783A JP S57173783 A JPS57173783 A JP S57173783A JP 6002181 A JP6002181 A JP 6002181A JP 6002181 A JP6002181 A JP 6002181A JP S57173783 A JPS57173783 A JP S57173783A
Authority
JP
Japan
Prior art keywords
frequency division
division circuit
unvolatile memory
rear stage
unvolatile
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
JP6002181A
Other languages
Japanese (ja)
Inventor
Heihachiro Ebihara
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP6002181A priority Critical patent/JPS57173783A/en
Publication of JPS57173783A publication Critical patent/JPS57173783A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/025—Circuits for deriving low frequency timing pulses from pulses of higher frequency by storing time-date which are periodically investigated and modified accordingly, e.g. by using cyclic shift-registers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Abstract

PURPOSE:To unnecessitate the input resistor of an unvolatile memory by giving data for writing in the unvolatile memory from frequency division for clock. CONSTITUTION:The input line of an unvolatile memory 5 is connected to the rear stage frequency division circuit 2b of a frequency division circuit 2 for watch. The reset terminal R or the set terminal S of the rear stage frequency division circuit 2b is used to make the rear stage frequency division circuit 2b all ''0'' or ''1'', and a voltage is applied to a wire VH for writing to write in the unvolatile memory 5 the content of rear stage frequency division circuit 26b. Based on the data written in the unvolatile memory 5, an adjustment device 7 adjusts the frequency of oscillation of a time standard oscillation source 1. If an input terminal T for testing is provided, this input terminal T is also used as an external terminal for writing data, and external clock signal may be forcibly applied to it.
JP6002181A 1981-04-21 1981-04-21 Watch circuit with unvolatile memory Pending JPS57173783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6002181A JPS57173783A (en) 1981-04-21 1981-04-21 Watch circuit with unvolatile memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6002181A JPS57173783A (en) 1981-04-21 1981-04-21 Watch circuit with unvolatile memory

Publications (1)

Publication Number Publication Date
JPS57173783A true JPS57173783A (en) 1982-10-26

Family

ID=13129985

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6002181A Pending JPS57173783A (en) 1981-04-21 1981-04-21 Watch circuit with unvolatile memory

Country Status (1)

Country Link
JP (1) JPS57173783A (en)

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