Data Sheet
284
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
Atmel-8271H-AVR- ATmega-Datasheet_08/2014
Notes: 1. See ”Alternate Functions of Port C” on page 86 for description of RSTDISBL Fuse.
2. The SPIEN Fuse is not accessible in serial programming mode.
3. See ”WDTCSR – Watchdog Timer Control Register” on page 55 for details.
4. See Table 29-17 on page 310 for BODLEVEL Fuse decoding.
Notes: 1. See ”Alternate Functions of Port C” on page 86 for description of RSTDISBL Fuse.
2. The SPIEN Fuse is not accessible in serial programming mode.
3. See ”WDTCSR – Watchdog Timer Control Register” on page 55 for details.
4. The default value of BOOTSZ[1:0] results in maximum Boot Size. See ”Pin Name Mapping” on page 287.
BODLEVEL2
(4)
2 Brown-out Detector trigger level 1 (unprogrammed)
BODLEVEL1
(4)
1 Brown-out Detector trigger level 1 (unprogrammed)
BODLEVEL0
(4)
0 Brown-out Detector trigger level 1 (unprogrammed)
Table 28-8. Fuse High Byte for ATmega328/328P
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 reserved
BOOTSZ1 2
Select Boot Size
(see
Table 27-7 on page 276,
Table 27-10 on page 277 and
Table 27-13 on page 278
for details)
0 (programmed)
(4)
BOOTSZ0 1
Select Boot Size
(see
Table 27-7 on page 276,
Table 27-10 on page 277 and
Table 27-13 on page 278
for details)
0 (programmed)
(4)
BOOTRST 0 Select Reset Vector 1 (unprogrammed)
Table 28-9. Fuse Low Byte
Low Fuse Byte Bit No Description Default Value
CKDIV8
(4)
7 Divide clock by 8 0 (programmed)
CKOUT
(3)
6 Clock output 1 (unprogrammed)
SUT1 5 Select start-up time 1 (unprogrammed)
(1)
SUT0 4 Select start-up time 0 (programmed)
(1)
CKSEL3 3 Select Clock source 0 (programmed)
(2)
Table 28-7. Fuse High Byte for ATmega48A/48PA/88A/88PA/168A/168PA (Continued)
High Fuse Byte Bit No Description Default Value