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C66x short circuit pin protection

Johannes
Mastermind 6240 points

Hi,

The C66x (6670, 6678...) have any kind of protection if you short circuit the IOZ pins?

What I mean is, the GPIO are IOZ, suppose I define them as output but I try to use them as input (using a signal generator, for example), what kind of damage will happen?

Thanks

  • 0
    TI__Mastermind 46460 points

    Johannes,

    The output buffers are only guaranteed to operate with the limits stated in the Data Manuals.  Operation outside those limits may impact reliability.  For instance, the C6678 has a maximum high-level output current of -6ma and a maximum low-level output current of 6ma.  Shorting two outputs together as mentioned in your post would result in currents above the stated limits.  If you are designing a system that may have two outputs connected to the same net, series resistors or other circuitry must be added to prevent over-current conditions.

    Tom