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Justme
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The three topmost pins of port A is used for JTAG. Therefore the pins must have those default values in the mode register to work as JTAG pins.

On the other hand, you are reading from a peripheral with no clock given to it, so whether or not what you read from an unclocked peripheral is relevant data is at anyone's guess.

The three topmost pins of port A is used for JTAG. Therefore the pins must have those default values to work as JTAG pins.

The three topmost pins of port A is used for JTAG. Therefore the pins must have those default values in the mode register to work as JTAG pins.

On the other hand, you are reading from a peripheral with no clock given to it, so whether or not what you read from an unclocked peripheral is relevant data is at anyone's guess.

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Justme
  • 172k
  • 6
  • 135
  • 351

The three topmost pins of port A is used for JTAG. Therefore the pins must have those default values to work as JTAG pins.