Human interface on SAM4S-Xplained:
- LED D9 blinks when USB host has checked and enabled HID Keyboard interface
- LED D10 displays caps lock status.
- The SW1(BOARD REV A) or BP2(BOARD REV B) opens a notepad application on Windows O.S. and sends key sequence "Atmel ARM"
- Only a low level on J13.PA15 will generate a wakeup to USB Host in remote wakeup mode.