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Last Post 12 Jul 2007 08:05 PM by  kurtl@logicpd.com
ISA IRQ management on M5475EVBE
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amancini@tecnosga.it
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12 Jul 2007 02:46 AM
    How can I handle ISA_IRQ0, ISA_IRQ1, ISA_IRQ2, ISA_IRQ3 on M5475EVBE board ?

    About ISA_IRQ management, the manual “Fire_Engine_HW_Spec.pdf” at page 33 reports: “offboard IRQx comes to the CPLD and generates IRQ6back at the processor”.
    The problem is that the line IRQ6# to the MCF5475 (monitored on J12 pin 44) remains always high even if I press the S3 button (INTERRUPT BUTTON) that is equivalent to an ISA_IRQ0 request.


    - The CPLD firmware of M5475EVBE board support ISA_IRQx management ?
    - Is there a software procedure to enable interrupt multiplexing (ISA_IRQx towards IRQ6#) into CPLD ?


    Thanks in advance
    Alberto Mancini
    kurtl@logicpd.com
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    12 Jul 2007 08:05 PM
    Alberto,
    By default the kit is shipped with the CPLD not programmed. In order to program the CPLD you need to download the CPLD update file and run the "update" command in Lolo. The process for obtaining the CPLD code is available through the registered product information page.

    -K
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