ATtiny25 Automotive Atmel Corporation, ATtiny25 Automotive Datasheet - Page 135

• Manufacturer Part Number: ATtiny25 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny25 Automotive

• Flash (kbytes): 2 Kbytes
• Pin Count: 8
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• 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): 0.12
• Eeprom (bytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• 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: 5
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

21.2
7598H–AVR–07/09
Fuse Bytes
Table 21-2.
Notes:
The ATtiny25/45/85 has three Fuse bytes.
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 21-3.
Table 21-4.
SELFPRGEN
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
Fuse High Byte
Fuse High Byte
LB Mode
1
2
3
(2)
(3)
1. Program the Fuse bits before programming the LB1 and LB2.
2. “1” means unprogrammed, “0” means programmed
(4)
Memory Lock Bits
(1)
Lock Bit Protection Modes
Fuse Extended Byte
Fuse High Byte
LB2
1
1
0
Bit No
Bit No
7
6
5
4
3
2
1
0
7
6
5
4
3
LB1
Description
-
-
-
-
-
-
-
Self-Programming Enable
Description
External Reset disable
DebugWIRE Enable
Enable Serial Program and Data
Downloading
Watchdog Timer always on
EEPROM memory is preserved
through the Chip Erase
1
0
0
Protection Type
No memory lock features enabled.
Further programming of the Flash and EEPROM is disabled in
High-voltage and Serial Programming mode. The Fuse bits are
locked in both Serial and High-voltage Programming mode.
debugWire is disabled.
Further programming and verification of the Flash and
EEPROM is disabled in High-voltage and Serial Programming
mode. The Fuse bits are locked in both Serial and High-voltage
Programming mode.
(1)(2)
Table
21-4,
(1)
Table 21-5
debugWire is disabled.
and Table61 describe briefly
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
1 (unprogrammed)
1 (unprogrammed)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed)
1 (unprogrammed, EEPROM
not preserved)
ATtiny25/45/85
(1)
135