ATTINY4313-MU Atmel, ATTINY4313-MU Datasheet - Page 179

• Manufacturer Part Number: ATTINY4313-MU
• Description: IC MCU AVR 4K FLASH 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY4313-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Processor Series: ATtiny
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI, USART, USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 2
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

20.2
8246A–AVR–11/09
Fuse Bits
The ATtiny2313A/4313 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 20-3.
Note:
Table 20-4.
Notes:
Fuse Extended
Byte
SELFPRGEN
Fuse High Byte
DWEN
EESAVE
SPIEN
WDTON
BODLEVEL2
BODLEVEL1
BODLEVEL0
RSTDISBL
(1)
(3)
1. Enables SPM instruction. See
1. The SPIEN Fuse is not accessible in serial programming mode.
2. See
3. Never ship a product with the DWEN Fuse programmed regardless of the setting of Lock bits.
4. See
5. See
(2)
(5)
A programmed DWEN Fuse enables some parts of the clock system to be running in all sleep
modes. This may increase the power consumption.
(4)
(4)
(4)
(1)
Fuse Extended Byte
Fuse High Byte
“WDTCSR – Watchdog Timer Control and Status Register” on page 44
Table 21-5 on page 198
“Alternate Functions of Port A” on page 61
Bit
No
Bit
No
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Description
–
–
–
–
–
–
–
Self Programming Enable
Description
debugWIRE Enable
EEPROM memory is preserved
through the Chip Erase
Enable Serial Program and Data
Downloading
Watchdog Timer always on
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
External Reset disable
for BODLEVEL Fuse decoding.
“Self-Programming the Flash” on page
Table
20-3,
for description of RSTDISBL Fuse.
Table 20-4
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
1 (unprogrammed)
1 (unprogrammed, EEPROM
not preserved)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
and
172.
Table 20-5
for details.
describe
179