JPS647235A - In-circuit emulator - Google Patents
In-circuit emulatorInfo
- Publication number
- JPS647235A JPS647235A JP62162924A JP16292487A JPS647235A JP S647235 A JPS647235 A JP S647235A JP 62162924 A JP62162924 A JP 62162924A JP 16292487 A JP16292487 A JP 16292487A JP S647235 A JPS647235 A JP S647235A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- target cpu
- memory
- cpu
- address bus
- 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
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
PURPOSE:To read coverage data from memory without stopping the action of a target CPU by allocating the one bus cycle of the target CPU to a control CPU for a prescribed time and for the remainder, allocating the using right to the target CPU. CONSTITUTION:A control signal (g) to execute an access to a memory in which a target CPU 21 generates is introduced to a bus arbitrating means 10 and the using right of the address bus of a coverage memory 4 is determined. For a prescribed time in respective bus cycles, the address bus of the coverage memory 4 is connected to the target CPU side and for the remaining time and while the bus is in an idle condition, the address bus is connected to a control CPU 1 side respectively. Thus, by the bus arbitrating means 10, the using right of the address bus is determined and when the using right is allocated to the control CPU side, in order to read coverage data, the action of the target CPU is not stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162924A JPS647235A (en) | 1987-06-30 | 1987-06-30 | In-circuit emulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162924A JPS647235A (en) | 1987-06-30 | 1987-06-30 | In-circuit emulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS647235A true JPS647235A (en) | 1989-01-11 |
Family
ID=15763823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62162924A Pending JPS647235A (en) | 1987-06-30 | 1987-06-30 | In-circuit emulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS647235A (en) |
-
1987
- 1987-06-30 JP JP62162924A patent/JPS647235A/en active Pending
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