ATMEGA169 ATMEL [ATMEL Corporation], ATMEGA169 Datasheet - Page 311

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

Example 1
Example 2
Example 3
Power-down Supply
Current
2514P–AVR–07/06
It is possible to calculate the typical current consumption based on the numbers from
Table 138 for other V
Calculate the expected current consumption in idle mode with USART0, TIMER1, and
SPI enabled at V
we need to add 12.4% for the USART0, 10.8% for the SPI, and 18.6% for the TIMER1
module. Reading from Figure 145, we find that the idle current consumption is ~0.18mA
at V
TIMER1, and SPI enabled, gives:
Same conditions as in example 1, but in active mode instead. From Table 138, second
column we see that we need to add 3.7% for the USART0, 3.2% for the SPI, and 5.6%
for the TIMER1 module. Reading from Figure 140, we find that the active current con-
sumption is ~0.6mA at V
mode with USART0, TIMER1, and SPI enabled, gives:
All I/O modules should be enabled. Calculate the expected current consumption in
active mode at V
out the I/O modules to be ~ 5.6mA (from Figure 141). Then, by using the numbers from
Table 138 - first column, we find the total current consumption:
Figure 150. Power-down Supply Current vs. V
I
I
I
CC
CC
CC
total
total
total
CC
≈
≈
3.5
2.5
1.5
0.5
= 3.0V and F = 1MHz. The total current consumption in idle mode with USART0,
≈
3
2
1
0
0.18mA
5.6mA
0.6mA
1.5
•
•
•
(
(
1
CC
(
CC
1
1
+
2
+
+
= 3.3V and F = 10MHz. We find the active current consumption with-
= 3.0V and F = 1MHz. From Table 138, second column, we see that
0.056
0.037
0.124
CC
and frequency settings than listed in Table 137.
CC
+
+
2.5
POWER-DOWN SUPPLY CURRENT vs. V
+
0.037
0.032
= 3.0V and F = 1MHz. The total current consumption in idle
0.108
+
+
+
WATCHDOG TIMER DISABLED
0.032
0.056
0.186
3
+
)
)
≈
0.056
≈
V
0.68mA
CC
0.26mA
3.5
(V)
+
CC
0.059
(Watchdog Timer Disabled)
4
)
≈
6.9mA
ATmega169/V
4.5
CC
5
5.5
-40 °C
85 °C
25 °C
311