JPS55113983A - Integrated circuit device for watch - Google Patents

Integrated circuit device for watch

Info

Publication number
JPS55113983A
JPS55113983A JP2220279A JP2220279A JPS55113983A JP S55113983 A JPS55113983 A JP S55113983A JP 2220279 A JP2220279 A JP 2220279A JP 2220279 A JP2220279 A JP 2220279A JP S55113983 A JPS55113983 A JP S55113983A
Authority
JP
Japan
Prior art keywords
microprocessor
bus line
switching circuit
circuit
integrated circuit
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
JP2220279A
Other languages
Japanese (ja)
Inventor
Shigeki Kumagai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2220279A priority Critical patent/JPS55113983A/en
Priority to US06/124,600 priority patent/US4342092A/en
Publication of JPS55113983A publication Critical patent/JPS55113983A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • G04G99/006—Electronic time-pieces using a microcomputer, e.g. for multi-function clocks

Landscapes

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

Abstract

PURPOSE:To simply connect an integrated circuit for a watch to a microprocessor by holding the output terminal of a switching circuit of the integrated circuit in high impedance state to separate the switching circuit from a bus line. CONSTITUTION:A time measuring circuit 3 normally counts the output pulses of a frequency divider 2 to measure the time. Since no control signal ST is applied to a switching circuit 5, the latter becomes high impedance with the result that the bus line 7 of a microprocessor 9 side is separated therefrom. Thus information can be transferred through an input/output interface circuit 10 and the bus line 7 externally to the microprocessor 9. When a control pulse CP of predetermined period is sequentially produced after the rise of the control signal ST, time information is produced from the switching circuit 5 to be transferred through the bus line 7 to the microprocessor 9 for calculation.
JP2220279A 1979-02-27 1979-02-27 Integrated circuit device for watch Pending JPS55113983A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2220279A JPS55113983A (en) 1979-02-27 1979-02-27 Integrated circuit device for watch
US06/124,600 US4342092A (en) 1979-02-27 1980-02-25 Integrated circuit device for clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2220279A JPS55113983A (en) 1979-02-27 1979-02-27 Integrated circuit device for watch

Publications (1)

Publication Number Publication Date
JPS55113983A true JPS55113983A (en) 1980-09-02

Family

ID=12076205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2220279A Pending JPS55113983A (en) 1979-02-27 1979-02-27 Integrated circuit device for watch

Country Status (1)

Country Link
JP (1) JPS55113983A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155778A (en) * 1983-02-24 1984-09-04 Seiko Epson Corp Portable type small timepiece
JPS6014193A (en) * 1983-07-06 1985-01-24 Seiko Epson Corp Portable small-sized timepiece
JPH02124493A (en) * 1989-07-28 1990-05-11 Seiko Epson Corp Time counting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155778A (en) * 1983-02-24 1984-09-04 Seiko Epson Corp Portable type small timepiece
JPS6014193A (en) * 1983-07-06 1985-01-24 Seiko Epson Corp Portable small-sized timepiece
JPH02124493A (en) * 1989-07-28 1990-05-11 Seiko Epson Corp Time counting apparatus
JPH0449080B2 (en) * 1989-07-28 1992-08-10 Seiko Epson Corp

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