ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 49

• Manufacturer Part Number: ATMEGA2561V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

2549K–AVR–01/07
device at the present operating conditions. Note that any value can be written to the
CLKPS bits regardless of the CKDIV8 Fuse setting. The Application software must
ensure that a sufficient division factor is chosen if the selected clock source has a higher
frequency than the maximum frequency of the device at the present operating condi-
tions. The device is shipped with the CKDIV8 Fuse programmed.
Table 23. Clock Prescaler Select
CLKPS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CLKPS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
ATmega640/1280/1281/2560/2561
CLKPS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CLKPS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Clock Division Factor
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
128
256
16
32
64
1
2
4
8
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