ATmega32U2 datasheet(61/314 Pages) ATMEL

Part #	ATmega32U2

Description	8-bit Microcontroller with 8/16/32K Bytes of ISP Flash and USB Controller

PDF	314 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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61 / 314 page

7799B–AVR–07/09

ATmega8U2/16U2/32U2

1010

Reserved

1011

1100

1101

1110

1111

Table 10-6.

Watchdog Timer Prescale Select, DIV = 3 (CLKwdt = CLK128 / 7) (Continued)

WDP3

WDP2

WDP1

WDP0

Number of WDT Oscillator

Cycles before 1st time-out

(Early warning)

Early warning Typical

Time-out at

VCC = 5.0V

Watchdog

Reset/Interrupt Typical

Time-out at

VCC = 5.0V

Table 10-7.

Watchdog Timer Prescale Select, DIV = 4 (CLKwdt = CLK128 / 9)

WDP3

WDP2

WDP1

WDP0

Number of WDT Oscillator

Cycles before 1st time-out

(Early warning)

Early warning Typical

Time-out at

CC = 5.0V

Watchdog

Reset/Interrupt Typical

Time-out at

CC = 5.0V

0000

2K (2048) cycles

72ms

144 ms

0001

4K (4096) cycles

144 ms

288 ms

0010

8K (8192) cycles

288 ms

576 ms

0011

16K (16384) cycles

576 s

1.15 s

0100

32K (32768) cycles

1.1 s

2.3 s

0101

64K (65536) cycles

2.3 s

4.6 s

0110

128K (131072) cycles

4.6 s

9.2 s

0111

256K (262144) cycles

9.2 s

18.4s

1000

512K (524288) cycles

18.4 s

36.8 s

1001

1024K (1048576) cycles

36.8 s

73 s

1010

Reserved

1011

1100

1101

1110

1111

ATmega32U2 Datasheet(PDF) 61 Page - ATMEL Corporation

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