ATTINY48PRE Datasheet, PDF (188/298 Pages) ATMEL Corporation – 123 Powerful Instructions – Most Single Clock Cycle Execution

Table 20-3. Fuse Extended Byte
Fuse Extended Byte
Bit No Description
Default Value
–
4
–
1
–
3
–
1
–
2
–
1
–
1
–
1
SELFPRGEN ⁽¹⁾
0
Self Programming Enable
1 (unprogrammed)
Notes: 1. Enables SPM instruction. See “Self-Programming the Flash” on page 180.
Table 20-4. Fuse High Byte
Fuse High Byte
RSTDISBL^{(1) (2)}
DWEN⁽²⁾
Bit No
7
6
SPIEN⁽³⁾
5
WDTON⁽⁴⁾
4
EESAVE
3
BODLEVEL2⁽⁵⁾
2
BODLEVEL1⁽⁵⁾
1
BODLEVEL0⁽⁵⁾
0
Description
External Reset Disable
debugWIRE Enable
Enable Serial Program and Data
Downloading
Watchdog Timer Always On
EEPROM memory preserved
through chip erase
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
Default Value
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
(SPI programming enabled)
1 (unprogrammed)
1 (unprogrammed)
(EEPROM not preserved)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Notes:
1. See “Alternate Functions of Port C” on page 70 for description of RSTDISBL Fuse.
2. Programming this fuse bit will change the functionality of the RESET pin and render further
programming via the serial interface impossible. The fuse bit can be unprogrammed using the
parallel programming algorithm (see page 192).
3. The SPIEN Fuse is not accessible in serial programming mode.
4. See “WDTCSR – Watchdog Timer Control Register” on page 47 for details.
5. See Table 8-2 on page 48 for BODLEVEL Fuse decoding.
188 ATtiny48/88
8008F–AVR–06/10