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itamar_nsu
Visitor II
November 12, 2003
Question

IO problem (ST7LITE29)

  • November 12, 2003
  • 4 replies
  • 1029 views
Posted on November 12, 2003 at 02:42

IO problem (ST7LITE29)

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    4 replies

    I
    itamar_nsuAuthor
    Visitor II
    November 9, 2003
    Posted on November 09, 2003 at 06:30

    Hi,

    I'm trying to read the status of PA5 pin. I configured the PADR & PAOR to input-pullup, but i can't get the pin's status on the PADR.. when i do the same thing with PA7 - it works ok... Does any one know why?!

    thanks

    Itamar

    p.s. I work with the inDart evaluation board

    D
    delser9
    Visitor II
    November 10, 2003
    Posted on November 10, 2003 at 03:17

    Be aware that there is a series resistor between your application and the ISP ports. This may change your signal levels. PA5 is an ISP input and therefore does have a 4k7 resistor in series. Check 'InDart User's Manual' page 6.

    I
    itamar_nsuAuthor
    Visitor II
    November 10, 2003
    Posted on November 10, 2003 at 03:25

    Thanks, but i had the same problem with PA2/1 too..

    any more ideas?

    itamar
    S
    shreya
    Visitor II
    November 12, 2003
    Posted on November 12, 2003 at 02:42

    Hi,

    In case of debugging with inDART, the ICCCLK and ICCDATA lines are used for communication between the PC and device. For Lite29 these are on port A. I am guessing that when you are manipulating port A you are changing PA6 and PA5 by mistake.(You should not touch even the corresponding PADDR/PAOR bits for these two lines) This could be corrupting data and causing the problem.

    Hope this helps...

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