JPS5694586A - Electronic timepiece having nonvolatile storage device - Google Patents

Electronic timepiece having nonvolatile storage device

Info

Publication number
JPS5694586A
JPS5694586A JP17302379A JP17302379A JPS5694586A JP S5694586 A JPS5694586 A JP S5694586A JP 17302379 A JP17302379 A JP 17302379A JP 17302379 A JP17302379 A JP 17302379A JP S5694586 A JPS5694586 A JP S5694586A
Authority
JP
Japan
Prior art keywords
write
dielectric strength
erase
storage device
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
JP17302379A
Other languages
Japanese (ja)
Inventor
Kazunari Hayafuchi
Heihachiro Ebihara
Fukuo Sekiya
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 Watch Co Ltd
Original Assignee
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 Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP17302379A priority Critical patent/JPS5694586A/en
Publication of JPS5694586A publication Critical patent/JPS5694586A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/10—Programming or data input circuits

Landscapes

  • Read Only Memory (AREA)
  • Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
  • Non-Volatile Memory (AREA)
  • Electric Clocks (AREA)

Abstract

PURPOSE:To avoid the destruction of peripheral circuit of low dielectric strength at the application of a high voltage at write-in and erase, by performing write-in/ erase to a storage device through a high dielectric strength transistor and using separated substrate of the peripheral circuit from a high dielectric strength transistor. CONSTITUTION:Through an MOS transistor with high dielectric strength for write- in drive isolated with substrate from the peripheral circuit, a write-in/erase voltage is fed to the gate of a nonvolatile memory element 2 from a write-in circuit 1 having the dielectric strength more than the write-in/erase voltage, for write-in/erase. Further, from the drain terminal of the memory element 2, to a logic circuit 3 consisting of conventional low dielectric strength MOS transistor, the signal of ''0'', ''1'' level of 1.5V system, for example, is fed, and the content of count for the logic circuit 3 can be displayed on a display device 4.
JP17302379A 1979-12-28 1979-12-28 Electronic timepiece having nonvolatile storage device Pending JPS5694586A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17302379A JPS5694586A (en) 1979-12-28 1979-12-28 Electronic timepiece having nonvolatile storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17302379A JPS5694586A (en) 1979-12-28 1979-12-28 Electronic timepiece having nonvolatile storage device

Publications (1)

Publication Number Publication Date
JPS5694586A true JPS5694586A (en) 1981-07-31

Family

ID=15952767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17302379A Pending JPS5694586A (en) 1979-12-28 1979-12-28 Electronic timepiece having nonvolatile storage device

Country Status (1)

Country Link
JP (1) JPS5694586A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159296A (en) * 1982-03-16 1983-09-21 Citizen Watch Co Ltd Non-volatile memory circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4857557A (en) * 1971-11-18 1973-08-13
JPS5023540A (en) * 1973-06-07 1975-03-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4857557A (en) * 1971-11-18 1973-08-13
JPS5023540A (en) * 1973-06-07 1975-03-13

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159296A (en) * 1982-03-16 1983-09-21 Citizen Watch Co Ltd Non-volatile memory circuit
JPH0447400B2 (en) * 1982-03-16 1992-08-03 Citizen Watch Co Ltd

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