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Original question:

DS90UB947-Q1: What are the differences between DS90UB947 and DS90UB941?

DS90UB941AS-Q1: GPIO internal structure when as output

Betty Guo
Expert 7300 points

Part Number: DS90UB941AS-Q1

Hi team,

as 942 d/s, the GPIO is pull down with 25kohm. we want to know what's the internal structure of GPIO pin. because if it is pull down, how does it output high? if it used as output ,does it need external pull up resistors?

thank you

  • 0
    TI__Guru** 103215 points

    Hello Betty,

    The 941AS GPIOs are push pull outputs. There is also a 25kOhm pulldown internally on the pin which weakly pulls the pin low when it is configured for high-Z. When the pin is configured as an output there is no need for external pullup/down resistors 

    Best Regards,

    Casey