JPS55103662A - Data processing unit - Google Patents
Data processing unitInfo
- Publication number
- JPS55103662A JPS55103662A JP1014979A JP1014979A JPS55103662A JP S55103662 A JPS55103662 A JP S55103662A JP 1014979 A JP1014979 A JP 1014979A JP 1014979 A JP1014979 A JP 1014979A JP S55103662 A JPS55103662 A JP S55103662A
- Authority
- JP
- Japan
- Prior art keywords
- data
- cpu
- buffers
- memory
- buffer
- 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.)
- Pending
Links
Landscapes
- Multi Processors (AREA)
- Bus Control (AREA)
Abstract
PURPOSE: To transfer data effectively with a simple constitution by controlling operation and non-operation of plural buffers by the control signal from a detection circuit and by forming a CPU and buffers on the same chip.
CONSTITUTION: A CPU, a program memory and a data memory are incorporated on the chip at least, and a memory extendable one-chip microcomputer is provided in the external. Here, tri-state address buffer i, data read controlling buffer k, data write controlling buffer l, two-way buffer j for data transfer, and circuit h which detects data transfer between the CPU and the external memory, etc., are provided. Then, by the control signal from circuit h, operating and non-operating of buffers are controlled to form the CPU and buffers on the same chip. Thus, data can be transferred effectively with a simple constitution.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1014979A JPS55103662A (en) | 1979-01-31 | 1979-01-31 | Data processing unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1014979A JPS55103662A (en) | 1979-01-31 | 1979-01-31 | Data processing unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55103662A true JPS55103662A (en) | 1980-08-08 |
Family
ID=11742212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1014979A Pending JPS55103662A (en) | 1979-01-31 | 1979-01-31 | Data processing unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55103662A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57121751A (en) * | 1981-01-20 | 1982-07-29 | Matsushita Electric Ind Co Ltd | Microprocessor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5326632A (en) * | 1976-08-25 | 1978-03-11 | Hitachi Ltd | Common memory control unit |
-
1979
- 1979-01-31 JP JP1014979A patent/JPS55103662A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5326632A (en) * | 1976-08-25 | 1978-03-11 | Hitachi Ltd | Common memory control unit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57121751A (en) * | 1981-01-20 | 1982-07-29 | Matsushita Electric Ind Co Ltd | Microprocessor |
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