firmware/third_party/mla_v2013_12_20/framework/usb/src/usb_device.c (USBWakeFromSuspend) : Clear UIRbits.IDLEIF so as not to suspend immediately after waking up
firmware/third_party/mla_v2013_12_20/apps/usb/device/hid_keyboard/firmware/src/ : Refine delays using _XTAL_FREQ
firmware/third_party/mla_v2013_12_20/apps/usb/device/hid_keyboard/firmware/src/ : Call APP_LEDUpdateUSBStatus() only from the main loop