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ATMEGA640 Datasheet(PDF) 66 Page - Microchip Technology

Part # ATMEGA640
Description  8-bit Microcontroller with 16/32/64KB In-System Programmable Flash
PDF  436 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

ATMEGA640 Datasheet(HTML) 66 Page - Microchip Technology

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
DS40002211A
Table 12-2.
Watchdog Timer Prescale Select
WDP3
WDP2
WDP1
WDP0
Number of WDT Oscillator Cycles
Typical Time-out at VCC = 5.0V
0
0
0
0
2K (2048) cycles
16ms
0
0
0
1
4K (4096) cycles
32ms
0
0
1
0
8K (8192) cycles
64ms
0
0
1
1
16K (16384) cycles
0.125s
0
1
0
0
32K (32768) cycles
0.25s
0
1
0
1
64K (65536) cycles
0.5s
0
1
1
0
128K (131072) cycles
1.0s
0
1
1
1
256K (262144) cycles
2.0s
1
0
0
0
512K (524288) cycles
4.0s
1
0
0
1
1024K (1048576) cycles
8.0s
10
10
Reserved
10
11
11
00
11
01
11
10
11
11



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