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Shutdown/Wake Up FAQ

Last modified by Microchip on 2025/10/02 08:30

Use the Wake Up Function on the AT91SAM9X5-EK Board

There are two options to wake-up the board:

  • Using the WAKE UP button located on the right side of NRST button
  • Using a Real-Time Clock (RTC)-generated wake-up

For both alternatives, the JP5 jumper on AT91SAM9X5-EK board must be open (the Force Power ON must be disabled).

To enable the RTC-generated wake-up, the following settings must be used in the board's device tree:

                        shdwc@fffffe10 {
                                compatible = "atmel,at91sam9x5-shdwc";
                                reg = <0xfffffe10 0x10>;
                                clocks = <&clk32k>;
                                atmel,wakeup-mode = "any";
                                atmel,wakeup-rtc-timer;

                        };

Summary

The AT91SAM9X5-EK board can be awakened either by pressing the WAKE UP button or by configuring an RTC-generated wake-up in the device tree, provided the JP5 jumper is open to disable Force Power ON.

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