Datasheet

Table 32-5. Extended Fuse Byte for ATmega328PB
Extended Fuse Byte Bit No. Description Default Value
– 7 – 1
– 6 – 1
– 5 – 1
– 4 – 1
CFD 3 Disable Clock Failure Detection 0 (programmed, CFD disable)
BODLEVEL2
(1)
2 Brown-out Detector trigger level 1 (unprogrammed)
BODLEVEL1
(1)
1 Brown-out Detector trigger level 1 (unprogrammed)
BODLEVEL0
(1)
0 Brown-out Detector trigger level 1 (unprogrammed)
Note:
1. Refer to Table BODLEVEL Fuse Coding in System and Reset Characteristics for BODLEVEL Fuse
decoding.
Table 32-6. Fuse High Byte
High Fuse Byte Bit No. Description Default Value
RSTDISBL
(1)
7 External Reset Disable 1 (unprogrammed)
DWEN 6 debugWIRE Enable 1 (unprogrammed)
SPIEN
(2)
5 Enable Serial Program and Data
Downloading
0 (programmed, SPI programming
enabled)
WDTON
(3)
4 Watchdog Timer Always On 1 (unprogrammed)
EESAVE 3 EEPROM memory is preserved through
the Chip Erase
1 (unprogrammed), EEPROM not
preserved
BOOTSZ1 2 Select Boot Size
(see Boot Loader Parameters)
0 (programmed)
(4)
BOOTSZ0 1 Select Boot Size
(see Boot Loader Parameters)
0 (programmed)
(4)
BOOTRST 0 Select Reset Vector 1 (unprogrammed)
Note:
1. Refer to Alternate Functions of Port C in I/O-Ports chapter for description of RSTDISBL Fuse.
2. The SPIEN Fuse is not accessible in serial programming mode.
3. Refer to WDTCSR – Watchdog Timer Control Register for details.
4. The default value of BOOTSZ[1:0] results in maximum Boot Size. See table Boot Size
Configuration in subsection Boot Loader Parameters in the previous chapter for details.
ATmega328PB
MEMPROG - Memory Programming
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001906C-page 386