JPS57178229A - Camera control system - Google Patents

Camera control system

Info

Publication number
JPS57178229A
JPS57178229A JP6243481A JP6243481A JPS57178229A JP S57178229 A JPS57178229 A JP S57178229A JP 6243481 A JP6243481 A JP 6243481A JP 6243481 A JP6243481 A JP 6243481A JP S57178229 A JPS57178229 A JP S57178229A
Authority
JP
Japan
Prior art keywords
interruption
supplied
control system
ram
camera control
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
Application number
JP6243481A
Other languages
Japanese (ja)
Inventor
Ryushi Shimokawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6243481A priority Critical patent/JPS57178229A/en
Publication of JPS57178229A publication Critical patent/JPS57178229A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/091—Digital circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Cameras In General (AREA)
  • Control By Computers (AREA)

Abstract

PURPOSE:To secure the instantaneous responsiveness for a camera control system using a microprocessor, by using an interruption control program to fetch an input data into an RAM. CONSTITUTION:The system clock CP is supplied to a microprocessor MPU from an oscillating circuit OSC, and at the same time the interruption signal produced from the clock CP by a timer TM is supplied to the MPU with every constant period. The MPU executes a main program in the period during which no interruption signal is supplied and executes an interruption control program in the period during which the interruption signal is supplied to replace the data of an RAM to the latest one. In such way, the contents of the RAM is replaced sequentially based on an interruption program to secure the instantaneous responsiveness which is required for a camera control system.
JP6243481A 1981-04-27 1981-04-27 Camera control system Pending JPS57178229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6243481A JPS57178229A (en) 1981-04-27 1981-04-27 Camera control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6243481A JPS57178229A (en) 1981-04-27 1981-04-27 Camera control system

Publications (1)

Publication Number Publication Date
JPS57178229A true JPS57178229A (en) 1982-11-02

Family

ID=13200069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6243481A Pending JPS57178229A (en) 1981-04-27 1981-04-27 Camera control system

Country Status (1)

Country Link
JP (1) JPS57178229A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516537A (en) * 1974-07-05 1976-01-20 Canon Kk ROSHUTSUSEIGYOHOHO

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516537A (en) * 1974-07-05 1976-01-20 Canon Kk ROSHUTSUSEIGYOHOHO

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