Datasheet

Table 29-4. ATmega644PA DC Characteristics - T
A
= -40°C to 105°C, V
CC
= 1.8V to 5.5V (unless otherwise
noted)
Symbol Parameter Condition Min. Typ. Max. Units
I
CC
Power Supply Current
(1)
Active 1MHz, V
CC
= 2V - - 0.7 mA
Active 4MHz, V
CC
= 3V - - 3
Active 8MHz, V
CC
= 5V - - 11
Idle 1MHz, V
CC
= 2V - - 0.17
Idle 4MHz, V
CC
= 3V - - 0.85
Idle 8MHz, V
CC
= 5V - - 6.0
Power-down mode
(2)
WDT enabled, V
CC
= 3V - - 15 μA
WDT disabled, V
CC
= 3V - - 5
Note:
1. All bits set in the ”PRR – Power Reduction Register ”
2. The current consumption values include input leakage current.
29.3. Speed Grades
Maximum frequency is dependent on V
CC.
As shown in Figure. Maximum Frequency vs. V
CC
, the
Maximum Frequency vs. V
CC
curve is linear between 1.8V < V
CC
< 2.7V and between 2.7V < V
CC
< 4.5V.
Figure 29-1. Maximum Frequency vs. V
CC
4MHz
1.8V 2.7V 4.5V
10MHz
20MHz
5.5V
Safe Operating Area
29.4. Clock Characteristics
Related Links
Calibrated Internal RC Oscillator on page 48
Atmel ATmega644PA [DATASHEET]
Atmel-42717C-ATmega644PA_Datasheet_Complete-10/2016
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