Bits definitions:

• Bit 7: 0 = INPUT mode 1 = OUTPUT mode 1 = PULL-UP (input) or PUSH-PULL (output)
• Bit 5: 0 = No external interrupt (input) or No slope control (output) 1 = External interrupt (input) or Slow control enabled (output)
• Bit 4: 0 = Low level (output) 1 = High level (output push-pull) or HI-Z (output open-drain)