The design of a microcomputer-controlled automotive AM/FM radio is discussed. The system features, and gives priorty to, a clock display. However, the 3-1/2-digit LED display can also serve as a 4-year calendar, elapsed-time counter, or frequency channel, on request. The tuning process automatically activates the frequency display.Basic aspects of real-time clocks and frequency measurements in microcomputer systems are discussed, as is the ability of the COSMAC processor to permit a software-generated clock to be obtained with low cost and high accuracy.While the ignition switch turns the display on or off, the CPU and clock run continuously. The use of CMOS circuitry in the system keeps the power drain below 5 milliamperes and assures months of system operation, even when the vehicle (battery) is not used.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Microprocessor-Controlled Automotive AM/FM Radio


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    1978 Automotive Engineering Congress and Exposition ; 1978



    Publication date :

    1978-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Microprocessor Controlled Fuel Injection for Automotive Diesel Engines

    McLean, D. / Lucas, G. G. / Adcock, P. | SAE Technical Papers | 1983


    Microprocessor controlled fuel injection for automotive Diesel engines

    Lucas,G.G. / McLean,D. / Adcock,P. et al. | Automotive engineering | 1983


    Managing Automotive Microprocessor Interfaces

    Long, David K. | SAE Technical Papers | 1978


    Automotive regulator for microprocessor supplies

    Marshall, C. | Tema Archive | 1981


    Microprocessor controlled tester

    Frantz, J.A. | Tema Archive | 1977