Rainbow Electronics ATmega3290P_V - Manual (Page 325)

325
ATmega329/3290/649/6490
2552H–AVR–11/06
Figure 151. Idle Supply Current vs. V
CC
(32 kHz External Oscillator)
Supply Current of I/O modules The tables and formulas below can be used to calculate the additional current consump-
tion for the different I/O modules in Active and Idle mode. The enabling or disabling of
the I/O modules are controlled by the Power Reduction Register. See “Power Reduction
Register” on page 35 for details.
IDLE SUPPLY CURRENT vs. V
CC
32kHz EXTERNAL OSCILLATOR
85 ˚C
25 ˚C
-40 ˚C
0
5
10
15
20
25
30
35
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
I CC
(uA)
Table 144.
Additional Current Consumption for the different I/O modules (absolute values)
PRR bit Typical numbers
V
CC
= 2V, F = 1MHz V
CC
= 3V, F = 4MHz V
CC
= 5V, F = 8MHz
PRADC 17 µA 116 µA 562 µA
PRUSART0 9 µA 59 µA 248 µA
PRSPI 10 µA 62 µA 257 µA
PRTIM1 5 µA 33 µA 135 µA
PRLCD 6 µA 36 µA 146 µA
Table 145.
Additional Current Consumption (percentage) in Active and Idle mode
PRR bit
Additional Current consumption
compared to Active with external
clock
(see Figure 142 and Figure 143) Additional Current consumption
compared to Idle with external
clock
(see Figure 147 and Figure 148)
PRADC 5.4% 16.8%
PRUSART0 2.7% 8.5%
PRSPI 2.9% 9.0%
PRTIM1 1.5% 4.8%
PRLCD 1.7% 5.2%