JPS57162159A - Storage element with clear function - Google Patents
Storage element with clear functionInfo
- Publication number
- JPS57162159A JPS57162159A JP56045838A JP4583881A JPS57162159A JP S57162159 A JPS57162159 A JP S57162159A JP 56045838 A JP56045838 A JP 56045838A JP 4583881 A JP4583881 A JP 4583881A JP S57162159 A JPS57162159 A JP S57162159A
- Authority
- JP
- Japan
- Prior art keywords
- clear
- counter
- signal
- written
- memory cell
- 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
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/20—Memory cell initialisation circuits, e.g. when powering up or down, memory clear, latent image memory
Abstract
PURPOSE:To eliminate the need for the monitor of end of clear even at external side, by providing a means outputting a clear end signal externally and providing a clear function in a storage element. CONSTITUTION:When a clear indication signal 107 goes to ''1'', a flip-flop(F/F)12 storing the state of clear is set and a counter 11 is reset. When data ''0'' is written to an address 0 of a memory cell array 1 instructed by the counter 11 by means of an output signal 109, the Add 1 instruction is given to the counter 11 with an output signal 105 delayed at a delay circuit 14 and ''0'' is written in the memory cell array 1 until overflow takes place. When the counter 11 overflows, ''0'' is written in all the addresses of the memory cell array 1 (to be cleared). thus, a signal 103 goes to ''1'' and a clear end signal 122 is outputted externally.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56045838A JPS57162159A (en) | 1981-03-27 | 1981-03-27 | Storage element with clear function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56045838A JPS57162159A (en) | 1981-03-27 | 1981-03-27 | Storage element with clear function |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57162159A true JPS57162159A (en) | 1982-10-05 |
JPS6146914B2 JPS6146914B2 (en) | 1986-10-16 |
Family
ID=12730358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56045838A Granted JPS57162159A (en) | 1981-03-27 | 1981-03-27 | Storage element with clear function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57162159A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51102440A (en) * | 1974-11-26 | 1976-09-09 | Texas Instruments Inc | DEJITARUDENSHIKEI SANKI |
JPS52132747A (en) * | 1976-04-30 | 1977-11-07 | Fuji Electric Co Ltd | Memory media initial clear control system |
JPS5922266A (en) * | 1982-07-28 | 1984-02-04 | Nec Corp | Driving means of magnetic head |
-
1981
- 1981-03-27 JP JP56045838A patent/JPS57162159A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51102440A (en) * | 1974-11-26 | 1976-09-09 | Texas Instruments Inc | DEJITARUDENSHIKEI SANKI |
JPS52132747A (en) * | 1976-04-30 | 1977-11-07 | Fuji Electric Co Ltd | Memory media initial clear control system |
JPS5922266A (en) * | 1982-07-28 | 1984-02-04 | Nec Corp | Driving means of magnetic head |
Also Published As
Publication number | Publication date |
---|---|
JPS6146914B2 (en) | 1986-10-16 |
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