Atmel ATmega328

299
8271D–AVR–05/11
ATmega48A/PA/88A/PA/168A/PA/328/P
Note: 1. The default value of BOOTSZ[1:0] results in maximum Boot Size. See ”Pin Name Mapping” on
page 304.
Note: 1. See Table 29-13 on page 324 for BODLEVEL Fuse decoding.
Table 28-5. Extended Fuse Byte for ATmega88A/88PA/168A/168PA
Extended Fuse Byte Bit No Description Default Value
–7– 1
–6– 1
–5– 1
–4– 1
–3– 1
BOOTSZ1 2
Select Boot Size
(see
Table 27-7 on page 292 and
Table 27-10 on page 293
for details)
0 (programmed)
(1)
BOOTSZ0 1
Select Boot Size
(see
Table 27-7 on page 292 and
Table 27-10 on page 293
for details)
0 (programmed)
(1)
BOOTRST 0 Select Reset Vector 1 (unprogrammed)
Table 28-6. Extended Fuse Byte for ATmega328/328P
Extended Fuse Byte Bit No Description Default Value
–7– 1
–6– 1
–5– 1
–4– 1
–3– 1
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)
Table 28-7. Fuse High Byte for ATmega48A/48PA/88A/88PA/168A/168PA
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)