ATTINY26L8SU SL383 Atmel, ATTINY26L8SU SL383 Datasheet - Page 110

• Manufacturer Part Number: ATTINY26L8SU SL383
• Description: MCU 8-Bit ATtiny AVR RISC 2KB Flash 3.3V/5V 20-Pin SOIC T/R
• Manufacturer: Atmel

Fuse Bits
110
ATtiny26(L)
The ATtiny26 has two Fuse bytes. Table 50 and Table 51 describe briefly the functional-
ity of all the fuses and how they are mapped into the fuse bytes. Note that the fuses are
read as logical zero, “0”, if they are programmed.
Table 50. Fuse High Byte
Notes:
Table 51. Fuse Low Byte
Notes:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are
locked if Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the
Lock bits.
Fuse High Byte
RSTDISBL
SPIEN
EESAVE
BODLEVEL
BODEN
Fuse Low Byte
PLLCK
CKOPT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
(1)
1. The SPIEN Fuse is not accessible in serial programming mode.
2. When programming the RSTDISBL Fuse, Parallel Programming has to be used to
1. The default value of SUT1..0 results in maximum start-up time. See Table 12 on page
2. The default setting of CKSEL3..0 results in internal RC Oscillator at 1 MHz. See
3. The CKOPT Fuse functionality depends on the setting of the CKSEL bits. See “Sys-
(3)
(2)
change fuses or perform further programming.
30 for details.
Table 3 on page 26 for details.
tem Clock and Clock Options” on page 24 for details.
Bit No
Bit No
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Description
Use PLL for internal clock
Oscillator options
Select start-up time
Select start-up time
Select Clock source
Select Clock source
Select Clock source
Select Clock source
Description
–
–
–
Select if PB7 is I/O pin or
RESET pin
Enable
and Data Downloading
EEPROM memory is
preserved through the Chip
Erase
Brown out detector trigger
level
Brown out detector enable
Serial Program
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed, PB7 is
RESET pin)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed, EEPROM not
preserved)
1 (unprogrammed)
1 (unprogrammed, BOD
disabled)
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
(1)
(2)
(2)
(2)
(1)
(2)
1477J–AVR–06/07