Rainbow Electronics ATtiny2313 - Manual (Page 42)

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
V
CC
= 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
1 0 1 0
Reserved
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1