JPS5494380A - Counter using microprocessor - Google Patents

Counter using microprocessor

Info

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
Application number
JP135078A
Other languages
Japanese (ja)
Other versions
JPH02674B2 (en
Inventor
Shigeru Harashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP135078A priority Critical patent/JPS5494380A/en
Publication of JPS5494380A publication Critical patent/JPS5494380A/en
Publication of JPH02674B2 publication Critical patent/JPH02674B2/ja
Granted legal-status Critical Current

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  • 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
JP135078A 1978-01-10 1978-01-10 Counter using microprocessor Granted JPS5494380A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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