Data Sheet

296
8161D–AVR–10/09
ATmega48PA/88PA/168PA/328P
Note: 1. The default value of BOOTSZ[1:0] results in maximum Boot Size. See ”Pin Name Mapping” on
page 300.
Note: 1. See Table 28-4 on page 318 for BODLEVEL Fuse decoding.
Table 27-5. Extended Fuse Byte for ATmega88PA/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 26-7 on page 289 and
Table 26-10 on page 290
for details)
0 (programmed)
(1)
BOOTSZ0 1
Select Boot Size
(see
Table 26-7 on page 289 and
Table 26-10 on page 290
for details)
0 (programmed)
(1)
BOOTRST 0 Select Reset Vector 1 (unprogrammed)
Table 27-6. Extended Fuse Byte for ATmega328P
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 27-7. Fuse High Byte for ATmega48PA/88PA/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)