JPS57147190A - Memory circuit - Google Patents

Memory circuit

Info

Publication number
JPS57147190A
JPS57147190A JP56031692A JP3169281A JPS57147190A JP S57147190 A JPS57147190 A JP S57147190A JP 56031692 A JP56031692 A JP 56031692A JP 3169281 A JP3169281 A JP 3169281A JP S57147190 A JPS57147190 A JP S57147190A
Authority
JP
Japan
Prior art keywords
electric power
voltage
power
data holding
detecting
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.)
Granted
Application number
JP56031692A
Other languages
Japanese (ja)
Other versions
JPS6160513B2 (en
Inventor
Yasuo Akatsuka
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56031692A priority Critical patent/JPS57147190A/en
Publication of JPS57147190A publication Critical patent/JPS57147190A/en
Publication of JPS6160513B2 publication Critical patent/JPS6160513B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
    • G11C5/141—Battery and back-up supplies

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)
  • Static Random-Access Memory (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To stop the supply of unnecessary electric power other than the electric power required for data holding at low electric power data holding by installing electric power detecting and unnecessary electric power supply stopping means. CONSTITUTION:Since a detecting signal R is not outputted from a power voltage detecting means 303 during an electric power source operates at normal operation voltage (Ex. 5V), a power switch 304 is ON and electric power is also supplied to a block 302. When low voltage data holding status is transferred by reducing power voltage (Ex. 3V), the detecting means 304 detects that the voltage is less than a prescribed level (Ex. 4V) and outputs a signal R, turning off the power switch 304 and stopping power supply to the block 302.
JP56031692A 1981-03-05 1981-03-05 Memory circuit Granted JPS57147190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56031692A JPS57147190A (en) 1981-03-05 1981-03-05 Memory circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56031692A JPS57147190A (en) 1981-03-05 1981-03-05 Memory circuit

Publications (2)

Publication Number Publication Date
JPS57147190A true JPS57147190A (en) 1982-09-10
JPS6160513B2 JPS6160513B2 (en) 1986-12-20

Family

ID=12338121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56031692A Granted JPS57147190A (en) 1981-03-05 1981-03-05 Memory circuit

Country Status (1)

Country Link
JP (1) JPS57147190A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045997A (en) * 1983-08-24 1985-03-12 Hitachi Ltd Semiconductor device
JPS6278617A (en) * 1985-10-01 1987-04-10 Fujitsu Kiden Ltd Power saving mpu system
US7376848B2 (en) 1997-06-27 2008-05-20 Broadcom Corporation Battery powered device with dynamic power and performance management

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56143589A (en) * 1980-04-10 1981-11-09 Oki Electric Ind Co Ltd Semiconductor memory device
JPS56143591A (en) * 1980-04-10 1981-11-09 Oki Electric Ind Co Ltd Semiconductor memory device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56143589A (en) * 1980-04-10 1981-11-09 Oki Electric Ind Co Ltd Semiconductor memory device
JPS56143591A (en) * 1980-04-10 1981-11-09 Oki Electric Ind Co Ltd Semiconductor memory device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045997A (en) * 1983-08-24 1985-03-12 Hitachi Ltd Semiconductor device
JPS6278617A (en) * 1985-10-01 1987-04-10 Fujitsu Kiden Ltd Power saving mpu system
US7376848B2 (en) 1997-06-27 2008-05-20 Broadcom Corporation Battery powered device with dynamic power and performance management
US7900067B2 (en) 1997-06-27 2011-03-01 Broadcom Corporation Battery powered device with dynamic and performance management
US8504852B2 (en) 1997-06-27 2013-08-06 Broadcom Corporation Battery powered device with dynamic power and performance management

Also Published As

Publication number Publication date
JPS6160513B2 (en) 1986-12-20

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