Low Power Application

Purpose

This example shows the different low power modes with several types of wake-up sources. And the consumption of the core in different power modes can be measured.

Requirements

This package can be used with SAM4L boards.

Description

The program will display a menu on console. It allows users to change the configuration and enter into a different power mode, and then measure the power consumption.

An amperemeter has to be plugged on the board instead of the VDDx jumper.

Note that for better consumption measurement:

• Run program out of flash without ICE connected.

Usage

• Build the program and download it to the board.
• Start the application.

1. On the computer, open and configure a terminal application (e.g., HyperTerminal on Microsoft Windows) with these settings:
   • 115200 bauds
   • 8 bits of data
   • No parity
   • 1 stop bit
   • No flow control
2. Start the application.
3. In the terminal window, the following text should appear:

   -- Low Power Example xxx --
   -- xxxxxx-xx
   -- Compiled: xxx xx xxxx xx:xx:xx --
   
   ===============================================
   Menu: press a key to continue.
   ===============================================
   Configure:
     0 : Power Saving Mode 0
     1 : Power Saving Mode 1
   Mode:
     A : Active Mode
     R : Retention Mode
     W : Wait Mode
     B : Backup Mode
   Quit:
     Q : Quit test.

4. Press one of the keys listed in the menu to perform the corresponding action.