ATmega48PA Automotive Atmel Corporation, ATmega48PA Automotive Datasheet - Page 57
ATmega48PA Automotive
Manufacturer Part Number
ATmega48PA Automotive
Description
Manufacturer
Atmel Corporation
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9223B–AVR–09/11
• Bit 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
running. The different prescaling values and their corresponding time-out periods are shown in
Table 11-2 on page
Table 11-2.
WDP3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Atmel ATmega48PA/88PA/168PA [Preliminary]
WDP2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Watchdog Timer Prescale Select
WDP1
57.
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
WDP0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Number of WDT Oscillator
1024K (1048576) cycles
128K (131072) cycles
256K (262144) cycles
512K (524288) cycles
16K (16384) cycles
32K (32768) cycles
64K (65536) cycles
2K (2048) cycles
4K (4096) cycles
8K (8192) cycles
Cycles
Reserved
Typical Time-out at
V
CC
0.125s
16ms
32ms
64ms
0.25s
0.5s
1.0s
2.0s
4.0s
8.0s
= 5.0V
57
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