JPS6476238A - Data memory circuit - Google Patents
Data memory circuitInfo
- Publication number
- JPS6476238A JPS6476238A JP23251787A JP23251787A JPS6476238A JP S6476238 A JPS6476238 A JP S6476238A JP 23251787 A JP23251787 A JP 23251787A JP 23251787 A JP23251787 A JP 23251787A JP S6476238 A JPS6476238 A JP S6476238A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- cpu
- data
- microcomputer
- contents
- 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
Abstract
PURPOSE:To observe the internal operation of a microcomputer from a external part by providing first and second memories where one and the same address is allocated, separing the second and a CPU and thereafter, outputting the storing contents of the second memory. CONSTITUTION:In a data memory circuit 4 of a CPU part 2 to constitute the microcomputer, the same address is allocated to a first memory 16 and a second memory 19. When the CPU part 2 executes the writing operation of data to the first memory 16, simultaneously with this operation, the same data are written to the second memory 19. When a prescribed instruction is given, the second memory 19 is separated from the CPU part 2 by a data output control part. Simultaneously, the contents to be stored to the second memory 19 is outputted to the external part regardless of the operation of the CPU part 2. Thus, without giving a burden to the CPU part 2, the contents operation of the microcomputer can be easily observed from the external part successively at real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23251787A JPS6476238A (en) | 1987-09-18 | 1987-09-18 | Data memory circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23251787A JPS6476238A (en) | 1987-09-18 | 1987-09-18 | Data memory circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6476238A true JPS6476238A (en) | 1989-03-22 |
Family
ID=16940569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23251787A Pending JPS6476238A (en) | 1987-09-18 | 1987-09-18 | Data memory circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6476238A (en) |
-
1987
- 1987-09-18 JP JP23251787A patent/JPS6476238A/en active Pending
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