JPS57147190A - Memory circuit - Google Patents
Memory circuitInfo
- 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
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.
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)
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)
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 |
-
1981
- 1981-03-05 JP JP56031692A patent/JPS57147190A/en active Granted
Patent Citations (2)
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)
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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