Rainbow-electronics ATtiny43U Manuel d'utilisateur télécharger pdf (Page 56)

8048B–AVR–03/09

ATtiny43U

• Bits 5, 2:0 – WDP[3:0]: Watchdog Timer Prescaler 3, 2, 1, and 0

The WDP[3:0] bits determine the Watchdog Timer prescaling when the Watchdog Timer is

enabled. The different prescaling values and their corresponding Timeout Periods are shown in

Table 9-3 on page 56.

Table 9-3. Watchdog Timer Prescale Select

WDP3 WDP2 WDP1 WDP0

Number of WDT Oscillator

Cycles

Typical Time-out at

= 5.0V

0 0 0 0 2K cycles 16 ms

0 0 0 1 4K cycles 32 ms

0 0 1 0 8K cycles 64 ms

0 0 1 1 16K cycles 0.125 s

0 1 0 0 32K cycles 0.25 s

0 1 0 1 64K cycles 0.5 s

0 1 1 0 128K cycles 1.0 s

0 1 1 1 256K cycles 2.0 s

1 0 0 0 512K cycles 4.0 s

1 0 0 1 1024K cycles 8.0 s

1010

Reserved

1011

1100

1101

1110

1111

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 181 182

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Rainbow-electronics ATtiny43U Manuel d'utilisateur Page 56