ATMEGA169 ATMEL [ATMEL Corporation], ATMEGA169 Datasheet - Page 305

• Manufacturer Part Number: ATMEGA169
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

ATmega169 Typical
Characteristics
Active Supply Current
2514P–AVR–07/06
The following charts show typical behavior. These figures are not tested during manu-
facturing. All current consumption measurements are performed with all I/O pins
configured as inputs and with internal pull-ups enabled. A sine wave generator with rail-
to-rail output is used as clock source.
All Active- and Idle current consumption measurements are done with all bits in the PRR
register set and thus, the corresponding I/O modules are turned off. Also the Analog
Comparator is disabled during these measurements. Table 137 and Table 138 on page
310 show the additional current consumption compared to I
every I/O module controlled by the Power Reduction Register. See “Power Reduction
Register” on page 34 for details.
The power consumption in Power-down mode is independent of clock selection.
The current consumption is a function of several factors such as: operating voltage,
operating frequency, loading of I/O pins, switching rate of I/O pins, code executed and
ambient temperature. The dominating factors are operating voltage and frequency.
The current drawn from capacitive loaded pins may be estimated (for one pin) as
C
ing frequency of I/O pin.
The parts are characterized at frequencies higher than test limits. Parts are not guaran-
teed to function properly at frequencies higher than the ordering code indicates.
The difference between current consumption in Power-down mode with Watchdog
Timer enabled and Power-down mode with Watchdog Timer disabled represents the dif-
ferential current drawn by the Watchdog Timer.
Figure 140. Active Supply Current vs. Frequency (0.1 - 1.0 MHz)
L
*
V
CC
1.6
1.4
1.2
0.8
0.6
0.4
0.2
*f where C
1
0
0
0.1
L
= load capacitance, V
0.2
ACTIVE SUPPLY CURRENT vs. FREQUENCY
0.3
0.4
Frequency (MHz)
0.1 - 1.0 MHz
CC
0.5
= operating voltage and f = average switch-
0.6
0.7
ATmega169/V
CC
0.8
Active and I
0.9
1
CC
5.5 V
5.0 V
4.5 V
4.0 V
3.3 V
2.7 V
1.8 V
Idle for
305