GB2056139B - Memory system - Google Patents

Memory system

Info

Publication number
GB2056139B
GB2056139B GB8032498A GB8032498A GB2056139B GB 2056139 B GB2056139 B GB 2056139B GB 8032498 A GB8032498 A GB 8032498A GB 8032498 A GB8032498 A GB 8032498A GB 2056139 B GB2056139 B GB 2056139B
Authority
GB
United Kingdom
Prior art keywords
count
addressed
address signals
stage
successive
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.)
Expired
Application number
GB8032498A
Other versions
GB2056139A (en
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.)
Pitney Bowes Inc
Original Assignee
Pitney Bowes 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
Priority claimed from US05/889,627 external-priority patent/US4224506A/en
Application filed by Pitney Bowes Inc filed Critical Pitney Bowes Inc
Publication of GB2056139A publication Critical patent/GB2056139A/en
Application granted granted Critical
Publication of GB2056139B publication Critical patent/GB2056139B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1415—Saving, restoring, recovering or retrying at system level
    • G06F11/1441—Resetting or repowering
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/18—Circuits for visual indication of the result
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/38—Starting, stopping or resetting the counter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/40—Monitoring; Error detection; Preventing or correcting improper counter operation
    • H03K21/403—Arrangements for storing the counting state in case of power supply interruption

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Distances Traversed On The Ground (AREA)
  • Electric Clocks (AREA)

Abstract

Volatile electronic counter provides data output signals, e.g. four BCD stage counts, and four cyclically changing address signals normally used to drive a display. A area power down detector operates to initiate transfer of the count to successive locations in a non-volatile memory addressed using the address signals from the counter. When power is restored successive memory locators are addressed and compared with the corresponding count stage which is incremented until equal when the next memory location is accessed in order to restore the count.
GB8032498A 1978-03-24 1979-03-21 Memory system Expired GB2056139B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/889,627 US4224506A (en) 1978-03-24 1978-03-24 Electronic counter with non-volatile memory
GB7909861A GB2019065B (en) 1978-03-24 1979-03-21 Electronic counter with non-volatile memory

Publications (2)

Publication Number Publication Date
GB2056139A GB2056139A (en) 1981-03-11
GB2056139B true GB2056139B (en) 1983-03-02

Family

ID=26270960

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8032498A Expired GB2056139B (en) 1978-03-24 1979-03-21 Memory system
GB8031342A Expired GB2056726B (en) 1978-03-24 1980-09-29 Memory system

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB8031342A Expired GB2056726B (en) 1978-03-24 1980-09-29 Memory system

Country Status (1)

Country Link
GB (2) GB2056139B (en)

Also Published As

Publication number Publication date
GB2056726A (en) 1981-03-18
GB2056139A (en) 1981-03-11
GB2056726B (en) 1983-02-23

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19990320