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TMS470R1A288 GIOA[0] default status after reset

The customer has a question about GIO of R1x device (TMS470R1A288PGET).

Could you pls have a look and put your comment? Thanks.

1> what's the default status of GIOA[0] after reset? input or output, IPU or IPD?

      --> according to datasheet, all I/Os are input by default, but not mention if there is internal pull up/down

2> Is external pull up/down resistor required for input mode? or just suspend?

      --> I think if there is IPU/IPD, it could be suspend. pls correct me if wrong.

I am not sure above because there is no description in the datasheet for interrupt-capable pin & 5v tolerant.

  • Justin Hua said:

     

    The customer has a question about GIO of R1x device (TMS470R1A288PGET).

    Could you pls have a look and put your comment? Thanks.

    1> what's the default status of GIOA[0] after reset? input or output, IPU or IPD?

          --> according to datasheet, all I/Os are input by default, but not mention if there is internal pull up/down

    >> All I/O pins are input by default (except nRST). The GIOA pins have no internal pull up or pull down, as stated in the datasheet.

    2> Is external pull up/down resistor required for input mode? or just suspend?

          --> I think if there is IPU/IPD, it could be suspend. pls correct me if wrong.

    >> Any input pin that is not driven to a low or high level by an external circuit must be pulled down. An external pull down is necessary if this pin does not have an internal pull down.

    I am not sure above because there is no description in the datasheet for interrupt-capable pin & 5v tolerant.

    Please be aware that the TMS470R1 Series (including the TMS470R1A288 device) is not recommended for new designs. However, the device, tool, or software continues to be in production to support existing customers.  Please see the full 'NRDN' notice here.

    Soon TI will be launching the new TMS470M series of microcontrollers.  This series will feature greater ARM CPU performance and a similar peripheral set to the TMS470R1 Series of microcontrollers.  Please come back soon for more information about the TMS470M Series of microcontrollers.  The product preview for the first two microcontrollers in the TMS470M series is available here: TMS470MF0660x - SPNS157.