ATMEGA261 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'ATMEGA261' PDF : 226 Pages View PDF
Table 9-4. Watchdog Timer Prescale Select
WDP3
0
WDP2
0
WDP1
0
WDP0
0
Number of WDT Oscillator
Cycles
2K (2048) cycles
Typical Time-out at
VCC = 5.0V
16 ms
0
0
0
1
4K (4096) cycles
32 ms
0
0
1
0
8K (8192) cycles
64 ms
0
0
1
1
16K (16384) cycles
0.125 s
0
1
0
0
32K (32764) cycles
0.25 s
0
1
0
1
64K (65536) cycles
0.5 s
0
1
1
0
128K (131072) cycles
1.0 s
0
1
1
1
256K (262144) cycles
2.0 s
1
0
0
0
512K (524288) cycles
4.0 s
1
0
0
1
1024K (1048576) cycles
8.0 s
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
Reserved(1)
1
1
1
0
1
1
1
1
Notes: 1. If selecting a reserved code WDT time-out is selected to be one of the legal selections.
48 ATtiny261/ATtiny461/ATtiny861
7753E–AVR–06/10
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