JPS5644952A - Micro processor - Google Patents
Micro processorInfo
- Publication number
- JPS5644952A JPS5644952A JP12161879A JP12161879A JPS5644952A JP S5644952 A JPS5644952 A JP S5644952A JP 12161879 A JP12161879 A JP 12161879A JP 12161879 A JP12161879 A JP 12161879A JP S5644952 A JPS5644952 A JP S5644952A
- Authority
- JP
- Japan
- Prior art keywords
- timing
- output
- program counter
- output terminal
- internal register
- 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
Landscapes
- Test And Diagnosis Of Digital Computers (AREA)
- Microcomputers (AREA)
Abstract
PURPOSE: To improve development efficiency of programs, by providing a means, which uses the access timing of the instruction decoder to output the internal register value to the output terminal of the program counter, and a means which selects the internal register above.
CONSTITUTION: Clock Sϕ is the timing to latch instruction code (a) of the addressed user program into instruction register 3, and clock S3 is the timing to output program counter value (b) to the external. It is sufficient if the program counter value to output terminal 6 is output only during the timing of S3 and Sϕ. Consequently, the internal register value can be output at the timing of S1 and S2 through the data bus from program counter output terminal 6 during the access time of the instruction decoder by gates 35 and 36.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12161879A JPS5644952A (en) | 1979-09-21 | 1979-09-21 | Micro processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12161879A JPS5644952A (en) | 1979-09-21 | 1979-09-21 | Micro processor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5644952A true JPS5644952A (en) | 1981-04-24 |
JPS6148189B2 JPS6148189B2 (en) | 1986-10-23 |
Family
ID=14815705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12161879A Granted JPS5644952A (en) | 1979-09-21 | 1979-09-21 | Micro processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5644952A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60146341A (en) * | 1984-01-09 | 1985-08-02 | Nec Corp | Microprocessor |
-
1979
- 1979-09-21 JP JP12161879A patent/JPS5644952A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60146341A (en) * | 1984-01-09 | 1985-08-02 | Nec Corp | Microprocessor |
JPH0330173B2 (en) * | 1984-01-09 | 1991-04-26 |
Also Published As
Publication number | Publication date |
---|---|
JPS6148189B2 (en) | 1986-10-23 |
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