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how to configure GPIO pins in high impedance input floating mode ?

Question asked by akhilesh.akhil on Aug 29, 2013
Latest reply on Aug 29, 2013 by jj.sprague
Hi All,

  GPIO_InitStruct->GPIO_Pin  = GPIO_Pin_1;
  GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStruct->GPIO_OType = GPIO_OType_PP;
  GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOD, &GPIO_InitStruct);

1. Is the above configuration is correct way to configure PD1 in high impedance input floating mode ?
2. what is the effect if I change output type to Open drain (GPIO_OType_OD)...?