JPS57101434A - Oscillator - Google Patents

Oscillator

Info

Publication number
JPS57101434A
JPS57101434A JP55177480A JP17748080A JPS57101434A JP S57101434 A JPS57101434 A JP S57101434A JP 55177480 A JP55177480 A JP 55177480A JP 17748080 A JP17748080 A JP 17748080A JP S57101434 A JPS57101434 A JP S57101434A
Authority
JP
Japan
Prior art keywords
oscillation
signal
output
circuit
oscillating
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
JP55177480A
Other languages
Japanese (ja)
Inventor
Atsushi Kobayashi
Minejiro Nojima
Yoshiaki Moriya
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 JP55177480A priority Critical patent/JPS57101434A/en
Publication of JPS57101434A publication Critical patent/JPS57101434A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To reduce power consumption by stopping the oscillating operation at storage mode in an oscillator assembled to a semiconductor integrated circuit and to prevent the malfunction at internal integrated circuit with the output of oscillating circuit when the oscillation is stopped. CONSTITUTION:When a power supply voltage V supplied to a microcomputer is sufficiently high, an external terminal 32n of an input and output port 31 is at low level, an oscillation circuit 33 oscillates and a clock pulse is outputted to be the operation mode. When a power supply voltage V is lowered and if there is any care of malfunction, a signal at the external terminal 32n is inverted to a high level, and an H flag of a status register 30 is set with the signal output of a timing generator to be a storage mode, and a generator 34 stops the production of signal, and the oscillation stop signal of high level is outputted, the internal part of the microcomputer is at a standby state to be set to low power consumption. When an oscillation stop signal is inputted to an NAND gate 41, the output is at low level, the gate 42 is at an inhibiting state, and the oscillating operation of an oscillation circuit 33 is stopped.
JP55177480A 1980-12-16 1980-12-16 Oscillator Pending JPS57101434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55177480A JPS57101434A (en) 1980-12-16 1980-12-16 Oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55177480A JPS57101434A (en) 1980-12-16 1980-12-16 Oscillator

Publications (1)

Publication Number Publication Date
JPS57101434A true JPS57101434A (en) 1982-06-24

Family

ID=16031642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55177480A Pending JPS57101434A (en) 1980-12-16 1980-12-16 Oscillator

Country Status (1)

Country Link
JP (1) JPS57101434A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936416A (en) * 1982-08-24 1984-02-28 Kyocera Corp Forming circuit of initializing signal
JPS60144015A (en) * 1984-01-06 1985-07-30 Matsushita Electric Ind Co Ltd Clock pulse oscillating device
JPS60154709A (en) * 1984-01-25 1985-08-14 Toshiba Corp Clock signal generating circuit
JPS60229531A (en) * 1984-04-27 1985-11-14 Mitsubishi Electric Corp Counting circuit device
JPS6198002A (en) * 1984-10-18 1986-05-16 Nec Corp Oscillation device
JPS61228725A (en) * 1985-04-03 1986-10-11 Nec Corp Integrated circuit device
JPS61206325U (en) * 1985-06-13 1986-12-26
JPH0267805A (en) * 1988-09-01 1990-03-07 Nec Ic Microcomput Syst Ltd Oscillating circuit
JPH0474393A (en) * 1990-07-17 1992-03-09 Nec Corp Semiconductor integrated circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145493A (en) * 1974-10-16 1976-04-17 Seiko Instr & Electronics
JPS5579422A (en) * 1978-12-11 1980-06-14 Minolta Camera Co Ltd Control circuit of camera

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145493A (en) * 1974-10-16 1976-04-17 Seiko Instr & Electronics
JPS5579422A (en) * 1978-12-11 1980-06-14 Minolta Camera Co Ltd Control circuit of camera

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936416A (en) * 1982-08-24 1984-02-28 Kyocera Corp Forming circuit of initializing signal
JPH0412648B2 (en) * 1982-08-24 1992-03-05 Kyocera Corp
JPS60144015A (en) * 1984-01-06 1985-07-30 Matsushita Electric Ind Co Ltd Clock pulse oscillating device
JPS60154709A (en) * 1984-01-25 1985-08-14 Toshiba Corp Clock signal generating circuit
JPH0311689B2 (en) * 1984-01-25 1991-02-18 Tokyo Shibaura Electric Co
JPS60229531A (en) * 1984-04-27 1985-11-14 Mitsubishi Electric Corp Counting circuit device
JPS6198002A (en) * 1984-10-18 1986-05-16 Nec Corp Oscillation device
JPS61228725A (en) * 1985-04-03 1986-10-11 Nec Corp Integrated circuit device
JPS61206325U (en) * 1985-06-13 1986-12-26
JPH0267805A (en) * 1988-09-01 1990-03-07 Nec Ic Microcomput Syst Ltd Oscillating circuit
JPH0474393A (en) * 1990-07-17 1992-03-09 Nec Corp Semiconductor integrated circuit

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