Rainbow-electronics ATtiny2313 Manuel d'utilisateur télécharger pdf (Page 42)

ATtiny2313

2543A–AVR–08/03

• Bits 5, 2..0 – WDP3..0: Watchdog Timer Prescaler 3, 2, 1, and 0

The WDP3..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 21.

Table 21. Watchdog Timer Prescale Select

WDP3 WDP2 WDP1 WDP0

Number of WDT Oscillator

Cycles

Typical Time-out at

= 5.0V

0000 2K cycles 16 ms

0001 4K cycles 32 ms

0010 8K cycles 64 ms

0011 16K cycles 0.125 s

0100 32K cycles 0.25 s

0101 64K cycles 0.5 s

0110 128K cycles 1.0 s

0111 256K cycles 2.0 s

1000 512K cycles 4.0 s

1001 1024K cycles 8.0 s

1010

Reserved

1011

1100

1101

1110

1111

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 210 211

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Rainbow-electronics ATtiny2313 Manuel d'utilisateur Page 42