ATMEGA8U2-AUR Atmel, ATMEGA8U2-AUR Datasheet - Page 63

• Manufacturer Part Number: ATMEGA8U2-AUR
• Description: MCU AVR 8K FLASH 16MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8U2-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

Table 10-9.
Table 10-10. Watchdog Timer Prescale Select, DIV = 7 (CLKwdt = CLK128 / 15)
7799D–AVR–11/10
WDP3
WDP3
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
WDP2
WDP2
Watchdog Timer Prescale Select, DIV = 6(CLKwdt = CLK128 / 13) (Continued)
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
WDP1
WDP1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
WDP0
WDP0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Number of WDT Oscillator
Cycles before 1st time-out
Number of WDT Oscillator
Cycles before 1st time-out
1024K (1048576) cycles
128K (131072) cycles
256K (262144) cycles
512K (524288) cycles
16K (16384) cycles
32K (32768) cycles
64K (65536) cycles
2K (2048) cycles
4K (4096) cycles
8K (8192) cycles
(Early warning)
(Early warning)
Early warning Typical
Early warning Typical
Reserved
Reserved
ATmega8U2/16U2/32U2
Time-out at
Time-out at
V
V
CC
CC
120 ms
240 ms
480 ms
0.960 s
1.92 s
15.3 s
30.7 s
61.4 s
3.8 s
7.6 s
= 5.0V
= 5.0V
Reset/Interrupt Typical
Reset/Interrupt Typical
Time-out at
Time-out at
V
V
Watchdog
Watchdog
CC
CC
240 ms
480 ms
960 ms
15.3 s
30.7 s
61.4 s
122 s
1.9 s
3.8 s
7.6 s
= 5.0V
= 5.0V
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