ATTINY261-15MZ Atmel, ATTINY261-15MZ Datasheet - Page 172

• Manufacturer Part Number: ATTINY261-15MZ
• Description: MCU AVR 2K FLASH 15MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY261-15MZ

• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 16
• Eeprom Size: 128 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Program Memory Size: 2KB (2K x 8)
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22.2
172
Fuse Bytes
ATtiny261/ATtiny461/ATtiny861
The ATtiny261/461/861 has three Fuse bytes.
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 22-3.
Table 22-4.
Notes:
SELFPRGEN
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
Fuse High Byte
Fuse High Byte
(2)
(3)
1. See
2. DWEN must be unprogrammed when Lock Bit security is required.
3. The SPIEN Fuse is not accessible in SPI Programming mode.
4. See
5. See
6. When programming the RSTDISBL Fuse, High-voltage Serial programming has to be used to
(4)
(1)
Fuses.
Memory Lock Bits” on page 171.
change fuses to perform further programming.
(5)
(5)
(5)
Fuse Extended Byte
Fuse High Byte
“Alternate Functions of Port B” on page 63
“WDTCR – Watchdog Timer Control Register” on page 46
Table 23-4 on page 190
Bit No
Bit No
7
6
5
4
3
2
1
0
7
6
6
4
3
2
1
0
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
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
for BODLEVEL Fuse decoding.
Table
22-3,
for description of RSTDISBL and DWEN
Table 22-4
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)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
for details.
and
See “Program And Data
Table 22-5
7753F–AVR–01/11
describe