Human interface on SAM4S-EK:
- Led 0 (D2) blinks when USB host has checked and enabled HID Keyboard interface
- Led 1 (D3) displays caps lock status.
- The USRPB1 (BP2) 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.