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md1
Visitor II
June 20, 2006
Question

Connecting I/O pins directly to ground

  • June 20, 2006
  • 2 replies
  • 726 views
Posted on June 20, 2006 at 13:39

Connecting I/O pins directly to ground

    This topic has been closed for replies.

    2 replies

    M
    md1Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:30

    The ARM9 datasheet recommends connecting unused I/O pins to ground (rather than through resistors?).

    There could be a situation where the software engineer incorrectly configures an I/O pin (it happens :) ) to output mode.

    Can these I/O pins not be set to output mode in software at startup. I know there is small period of time at startup when the I/O's are not configured, and could be susceptable to noise. Is there more danger of the core being upset due to noise on the STR9?

    Thanks,

    Marty.

    H
    halim
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:30

    Hi

    I suggest to use pull-down resistor and not to connect unused pins to ground directly

    best regards,

    Punto

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