OD_3231_03 Alternate Function Mask

Defines how the pins (inputs/outputs DIO1, 2...) of the device are used.

Each bit in the respective subindex corresponds to a pin, whereby the first pin configures DIO1, the second pin DIO2, etc.

• Subindex 03_h Alternate Function Mask: This bit mask defines whether the alternative function of the pin is to be activated.

  To activate an alternative function, set the corresponding bit to "1":

  If you do not activate the alternative function, you can no longer use the corresponding pin as a normal input/output.

• Subindex 01_h Output Mask: This bit mask defines whether the pin is used as input or output (depending on whether an alternative function was activated for the pin in subindex 03_h):
  • Bit = "0": Pin is input (default)
  • Bit = "1": Pin is output

• Subindex 02_h Pullup Mask: This bit mask defines whether the pin is a pullup or pulldown:

  • Bit = "0": Pin is pulldown (default)
  • Bit = "1": Pin is pullup

  Subindex 02_h is only active for the pin if it is defined as an input.

Example for subindex 01_h: Pin 2 and pin 3 are to be outputs, value = "6" (=0110 _b)