3.20 Push Buttons

The SAM9X75 cHybrid features eleven buttons:

  • Eight user push buttons (BT1-BT8) connected to GPIO. These are free for user application usage.
  • One board reset push button (SW1). When pressed, the processor is reset.
  • One wake-up button (SW2) connected to WKUP0. When pressed, the processor exits the Shutdown state.
  • One start push button (SW3) connected to the MCP16501 pin. When pressed, the PMIC start-up sequence is initiated if the buck converters are off.

The following figure shows the push buttons implementation.

Figure 3-27. Push Buttons

The following table shows the user push button signal descriptions.

Table 3-15. User Push Button Signal Description
PIOSignal NameSignal Description
PA21USER_BUTTON_1General purpose input
PB1USER_BUTTON_2General purpose input
PA6USER_BUTTON_3General purpose input
PB7USER_BUTTON_4General purpose input
PA8USER_BUTTON_5General purpose input
PB2USER_BUTTON_6General purpose input
PB13USER_BUTTON_7General purpose input
PB9USER_BUTTON_8General purpose input