-MOUSEKEY_ENABLE = yes # Mouse keys
-EXTRAKEY_ENABLE = yes # Audio control and System control
-NKRO_ENABLE = yes # USB Nkey Rollover
-
-PS2_USE_USART = yes # uses hardware USART engine for PS/2 signal receive(recomened)
-#PS2_USE_INT = yes # uses external interrupt for falling edge of PS/2 clock pin
-#PS2_USE_BUSYWAIT = yes # uses primitive reference code
+# LUFA specific
+#
+# Target architecture (see library "Board Types" documentation).
+ARCH = AVR8
+
+# Input clock frequency.
+# This will define a symbol, F_USB, in all source code files equal to the
+# input clock frequency (before any prescaling is performed) in Hz. This value may
+# differ from F_CPU if prescaling is used on the latter, and is required as the
+# raw input clock is fed directly to the PLL sections of the AVR for high speed
+# clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+# at the end, this will be done automatically to create a 32-bit value in your
+# source code.
+#
+# If no clock division is performed on the input clock inside the AVR (via the
+# CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_USB = $(F_CPU)