JPS57172589A - Memory access circuit - Google Patents
Memory access circuitInfo
- Publication number
- JPS57172589A JPS57172589A JP5553381A JP5553381A JPS57172589A JP S57172589 A JPS57172589 A JP S57172589A JP 5553381 A JP5553381 A JP 5553381A JP 5553381 A JP5553381 A JP 5553381A JP S57172589 A JPS57172589 A JP S57172589A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- signals
- inputted
- order digit
- outputted
- 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
- G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management
Abstract
PURPOSE:To write and read data correctly by applying to a chip selection terminal a signal obtained by AND of a memory selection signal and a synchronizing signal synchronized with machine cycles. CONSTITUTION:In a memory access circuit, the low-order digit signals of address signals outputted from a microprocessor 1 are connected to inputs of addresses 4 and 5 of an address latch type memory 3, and the high-order digit signals are inputted to a decoder which converts the high-order digit signals into corresponding memory selection signals to the memory 3; and the memory selection signals outputted by the decoder and a machine synchronizing signal outputted by the microprocessor 1 are inputted to an AND circuit, whose output is inputted to the chip selection terminal of the address latch type memory 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5553381A JPS57172589A (en) | 1981-04-15 | 1981-04-15 | Memory access circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5553381A JPS57172589A (en) | 1981-04-15 | 1981-04-15 | Memory access circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57172589A true JPS57172589A (en) | 1982-10-23 |
JPS6143791B2 JPS6143791B2 (en) | 1986-09-30 |
Family
ID=13001359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5553381A Granted JPS57172589A (en) | 1981-04-15 | 1981-04-15 | Memory access circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57172589A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5925699U (en) * | 1982-08-10 | 1984-02-17 | 三洋電機株式会社 | electronic equipment |
JPH01100240U (en) * | 1987-12-22 | 1989-07-05 |
-
1981
- 1981-04-15 JP JP5553381A patent/JPS57172589A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5925699U (en) * | 1982-08-10 | 1984-02-17 | 三洋電機株式会社 | electronic equipment |
JPS633038Y2 (en) * | 1982-08-10 | 1988-01-25 | ||
JPH01100240U (en) * | 1987-12-22 | 1989-07-05 | ||
JPH0435957Y2 (en) * | 1987-12-22 | 1992-08-25 |
Also Published As
Publication number | Publication date |
---|---|
JPS6143791B2 (en) | 1986-09-30 |
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