JPS5494380A - Counter using microprocessor - Google Patents
Counter using microprocessorInfo
- Publication number
- JPS5494380A JPS5494380A JP135078A JP135078A JPS5494380A JP S5494380 A JPS5494380 A JP S5494380A JP 135078 A JP135078 A JP 135078A JP 135078 A JP135078 A JP 135078A JP S5494380 A JPS5494380 A JP S5494380A
- Authority
- JP
- Japan
- Prior art keywords
- interruption
- instruction
- pseudo
- pulse width
- microprocessor
- 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
- Debugging And Monitoring (AREA)
Abstract
PURPOSE: To improve the resolution of pulse width measurement, by using the figure counted by the counter of microprocessor and taking execution time of one pseudo-instruction due to interruption as 1 count time.
CONSTITUTION: When a program is turned ON, a microprocessor μP10 selects an input/output interface 15, and a control signal is sent into an input circuit 3, thereby waiting for an interruption. When the pulse width input signal being measured is inputted into the circuit 3, its output becomes a request signal of interruption to μP10, which, therefore, controls a port 14 to output an interruption instruction on a bus 13. Prior to start of execution of pseudo-instruction, the content of the program counter of μP10 is set to an address free of memory, and the counting corresponding to the pulse width signal is pbtained from the figure advanced from the start of execution of the pseudo-instruction till the end as counted on the program counter.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP135078A JPS5494380A (en) | 1978-01-10 | 1978-01-10 | Counter using microprocessor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP135078A JPS5494380A (en) | 1978-01-10 | 1978-01-10 | Counter using microprocessor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5494380A true JPS5494380A (en) | 1979-07-26 |
JPH02674B2 JPH02674B2 (en) | 1990-01-09 |
Family
ID=11499031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP135078A Granted JPS5494380A (en) | 1978-01-10 | 1978-01-10 | Counter using microprocessor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5494380A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6135369A (en) * | 1984-07-27 | 1986-02-19 | Matsushita Electric Ind Co Ltd | Signal processor |
JPS63169826A (en) * | 1987-01-07 | 1988-07-13 | Mitsubishi Electric Corp | Counter circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4895170A (en) * | 1972-03-15 | 1973-12-06 | ||
JPS5477174A (en) * | 1977-12-02 | 1979-06-20 | Bell & Howell Japan | Method of measuring pulse width by using microcomputer |
-
1978
- 1978-01-10 JP JP135078A patent/JPS5494380A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4895170A (en) * | 1972-03-15 | 1973-12-06 | ||
JPS5477174A (en) * | 1977-12-02 | 1979-06-20 | Bell & Howell Japan | Method of measuring pulse width by using microcomputer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6135369A (en) * | 1984-07-27 | 1986-02-19 | Matsushita Electric Ind Co Ltd | Signal processor |
JPS63169826A (en) * | 1987-01-07 | 1988-07-13 | Mitsubishi Electric Corp | Counter circuit |
Also Published As
Publication number | Publication date |
---|---|
JPH02674B2 (en) | 1990-01-09 |
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