ATtiny85 Atmel Corporation, ATtiny85 Datasheet - Page 152

• Manufacturer Part Number: ATtiny85
• Manufacturer: Atmel Corporation

Specifications of ATtiny85

• Flash (kbytes): 8 Kbytes
• Pin Count: 8
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 3
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 6
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

20.2
152
Fuse Bytes
ATtiny25/45/85
ATtiny25/45/85 has three fuse bytes, as described in
Note that fuses are read as logical zero, “0”, when programmed.
Table 20-3.
Notes:
Table 20-4.
Notes:
SELFPRGEN
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
Fuse High Byte
Fuse High Byte
(1) (2) (3)
(4)
1. Enables SPM instruction. See
1. Controls use of RESET pin. See
2. After this fuse has been programmed device can be programmed via high-voltage serial mode,
3. Must be unprogrammed when lock bit security is required.
4. This fuse is not accessible in SPI programming mode.
5. See
6. See table
(5)
only.
Lock Bits” on page 151.
(1) (2)
(6)
(6)
(6)
(1)
Fuse Extended Byte
Fuse High Byte
“WDTCR – Watchdog Timer Control Register” on page 47
“BODLEVEL Fuse Coding. TA = -40°C to +85°C” on page
Bit No
Bit No
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Description
-
-
-
-
-
-
-
Self-programming enabled
Description
External reset disabled
DebugWIRE enabled
Serial program and data download
enabled
Watchdog timer always on
EEPROM preserves chip erase
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
“Self-Programming the Flash” on page
“Alternate Functions of Port B” on page
Table
20-3,
See “Program And Data Memory
Table
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
0 (programmed)
(SPI prog. enabled)
1 (unprogrammed)
(EEPROM not preserved)
for details.
171.
20-4, and
145.
62.
2586N–AVR–04/11
Table
20-5.