Rainbow Electronics ATtiny43U - Manual (Page 56)

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
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