3.2.3 Super User Fantastic Feature Enable Register

The Super User Fantastic Feature Enable Register allows the user to modify the behavior of the mEDBG.

Name:	SUFFER
Offset:	0x0120
Reset:	0xFF
Property:	N/A


Bit	7	6	5	4	3	2	1	0
						EOF	LOWP	FUSE
Access						R/W	R/W	R/W
Reset						1	1	1

Bit 2 – EOF Extended Off

Writing the EOF bit to ‘1’ sets default operation. Writing the EOF bit to ‘0’ enables the extended off power mode. If no USB enumeration is successful within five seconds of power-up, the mEDBG enters deep sleep.

Bit 1 – LOWP Low Power

Writing the LOWP bit to ‘1’ sets the system clock to its default value. Writing the LOWP bit to ‘0’ enables low-power mode. The mEDBG is set to run at 1 MHz, which decreases the power usage.

Bit 0 – FUSE FUSE Protection

Writing the FUSE bit to ‘1’ enables fuse protection when using Atmel Studio. The fuse protection prevents modification of specific fuses in the ATmega168PB target device that could make the mEDBG on the ATmega168PB Xplained Mini not usable. Writing the FUSE bit to ‘0’ removes all protection of fuses in the ATmega168PB target device.

Warning: Writing the FUSE bit to ‘0’ enables modification of all fuses in the ATmega168PB. Setting wrong fuse settings may render the mEDBG not usable on the ATmega168PB Xplained Mini. As an example, if an invalid clock setting is set, recovery may require an external debugger.