Table, Attiny43u – Rainbow Electronics ATtiny43U User Manual
Page 56
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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.
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
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