
317
2593O–AVR–02/12
ATmega644
Note:
1. "Max" means the highest value where the pin is guaranteed to be read as low
2. "Min" means the lowest value where the pin is guaranteed to be read as high
3. Although each I/O port can sink more than the test conditions (20 mA at VCC = 5V, 10 mA at VCC = 3V) under steady state
conditions (non-transient), the following must be observed:
1.)The sum of all IOL, for ports A0-A7, G2, C4-C7 should not exceed 100 mA.
2.)The sum of all IOL, for ports C0-C3, G0-G1, D0-D7 should not exceed 100 mA.
3.)The sum of all IOL, for ports G3-G5, B0-B7, E0-E7 should not exceed 100 mA.
4.)The sum of all IOL, for ports F0-F7 should not exceed 100 mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test condition.
4. Although each I/O port can source more than the test conditions (20 mA at VCC = 5V, 10 mA at VCC = 3V) under steady
state conditions (non-transient), the following must be observed:
1)The sum of all IOH, for ports A0-A7, G2, C4-C7 should not exceed 100 mA.
2)The sum of all IOH, for ports C0-C3, G0-G1, D0-D7 should not exceed 100 mA.
3)The sum of all IOH, for ports G3-G5, B0-B7, E0-E7 should not exceed 100 mA.
4)The sum of all IOH, for ports F0-F7 should not exceed 100 mA.
If IOH exceeds the test condition, VOH may exceed the related specification. Pins are not guaranteed to source current
greater than the listed test condition.
5. All DC Characteristics contained in this datasheet are based on simulation and characterization of other AVR microcon-
trollers manufactured in the same process technology. These values are preliminary values representing design targets, and
will be updated after characterization of actual silicon
7. Power-down values includes Input Leakage Current.
ICC
Active 1 MHz, VCC = 2V
(ATmega644V)
0.5
mA
Active 4 MHz, VCC = 3V
(ATmega644L)
2.7
Active 8 MHz, VCC = 5V
(ATmega644)
9.0
Idle 1 MHz, VCC = 2V
(ATmega644V)
0.4
0.15
Idle 4 MHz, VCC = 3V
(ATmega644L)
0.7
Idle 8 MHz, VCC = 5V
(ATmega644)
2.5
WDT enabled, VCC = 3V
<8
20
A
WDT disabled, VCC = 3V
<2
3
VACIO
Analog Comparator
Input Offset Voltage
VCC = 5V
Vin = VCC/2
<10
40
mV
IACLK
Analog Comparator
Input Leakage Current
VCC = 5V
Vin = VCC/2
-50
50
nA
tACID
Analog Comparator
Propagation Delay
VCC = 2.7V
VCC = 4.0V
750
500
ns
T
A = -40C to 85C, VCC = 1.8V to 5.5V (unless otherwise noted) (Continued)
Symbol
Parameter
Condition
Min.(5)
Typ.
Max.(5)
Units