ATtiny26 Atmel Corporation, ATtiny26 Datasheet - Page 108

• Manufacturer Part Number: ATtiny26
• Manufacturer: Atmel Corporation

Specifications of ATtiny26

• Flash (kbytes): 2 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 11
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

Fuse Bits
108
ATtiny26(L)
The ATtiny26 has two Fuse bytes. Table 50 and Table 51 describe briefly the functionality 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.
RSTDISBL
SPIEN
EESAVE
BODLEVEL
BODEN
Fuse Low Byte
PLLCK
CKOPT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
Fuse High Byte
(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 change
1. The default value of SUT1..0 results in maximum start-up time. See Table 12 on page 29 for
2. The default setting of CKSEL3..0 results in internal RC Oscillator at 1 MHz. See Table 3 on
3. The CKOPT Fuse functionality depends on the setting of the CKSEL bits. See “System Clock
(3)
(2)
fuses or perform further programming.
details.
page 25 for details.
and Clock Options” on page 23 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
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
(1)
(2)
(2)
(2)
(1)
(2)
1477K–AVR–08/10