JPS5762430A - Processor for power source recovery - Google Patents

Processor for power source recovery

Info

Publication number
JPS5762430A
JPS5762430A JP55137146A JP13714680A JPS5762430A JP S5762430 A JPS5762430 A JP S5762430A JP 55137146 A JP55137146 A JP 55137146A JP 13714680 A JP13714680 A JP 13714680A JP S5762430 A JPS5762430 A JP S5762430A
Authority
JP
Japan
Prior art keywords
power
power failure
power source
cpu
during
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
JP55137146A
Other languages
Japanese (ja)
Inventor
Takashi Tsunoda
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP55137146A priority Critical patent/JPS5762430A/en
Publication of JPS5762430A publication Critical patent/JPS5762430A/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)

Abstract

PURPOSE:To reduce the consumption of a power source during a power failure by stopping printing operation on detecting the power failure, by storing input data during the power faulure period by a power source for power failure, and by printing the stored data when the power source recovers from the power failure. CONSTITUTION:Once the power failure of a power source circuit PW occurs, a transistor TR is turned off to inform a CPU of that through an interface circuit VIA. The CPU stops the operation of a printer PRT through the VIA, a flip-flop FF and a printer control circuit CNT. Devices except the PRT are supplied with electric power from a nickel-cadmium battery NID provided for power failures, and input data from a keyboard KB is stored in a nonvolatile memory C-MOSRAM. As the PW recovers from the power failure, the TR is turned on to inform the CPU of that similarly, and the CPU supplies electric power to the PRT through the VIA, etc., to print out the data stored in the C-MOSRAM during the power failure. Thus, the consumption of the power source in case of a power interruption is reduced and even during a power interruption, operations other than printing are performed smoothly.
JP55137146A 1980-09-30 1980-09-30 Processor for power source recovery Pending JPS5762430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55137146A JPS5762430A (en) 1980-09-30 1980-09-30 Processor for power source recovery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55137146A JPS5762430A (en) 1980-09-30 1980-09-30 Processor for power source recovery

Publications (1)

Publication Number Publication Date
JPS5762430A true JPS5762430A (en) 1982-04-15

Family

ID=15191886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55137146A Pending JPS5762430A (en) 1980-09-30 1980-09-30 Processor for power source recovery

Country Status (1)

Country Link
JP (1) JPS5762430A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182554A2 (en) * 1984-11-10 1986-05-28 International Computers Limited Keyboard arrangements
JPS6375812A (en) * 1986-09-18 1988-04-06 Pfu Ltd Power restoration control system for power failure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182554A2 (en) * 1984-11-10 1986-05-28 International Computers Limited Keyboard arrangements
JPS6375812A (en) * 1986-09-18 1988-04-06 Pfu Ltd Power restoration control system for power failure

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