Datasheet

174
2586D–AVR–02/06
ATtiny25/45/85
Figure 25-10. Idle Supply Current vs. V
CC
(Internal RC Oscillator, 128 MHz)
25.2 Supply Current of I/O modules
The tables and formulas below can be used to calculate the additional current consumption 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 ”PRR – Power Reduction Register” on
page 34 for details.
IDLE SUPPLY CURRENT vs. V
CC
INTERNAL RC OSCILLATOR, 128 kHz
85 ˚C
25 ˚C
-40 ˚C
0
0,01
0,02
0,03
0,04
0,05
0,06
0,07
0,08
0,09
0,1
1,5 2 2,5 3 3,5 4 4,5 5 5,5
V
CC
(V)
I
CC
(mA)
Table 25-1. 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
PRTIM1 43 uA 270 uA 1090 uA
PRTIM0 5 uA 28 uA 116 uA
PRUSI 4 uA 25 uA 102 uA
PRADC 13 uA 84 uA 351 uA
Table 25-2. Additional Current Consumption (percentage) in Active and Idle mode
PRR bit
Additional Current consumption
compared to Active with external
clock
(see Figure 25-1 and Figure 25-2)
Additional Current consumption
compared to Idle with external clock
(see Figure 25-6 and Figure 25-7)
PRTIM1 17.3 % 68.4 %
PRTIM0 1.8 % 7.3 %
PRUSI 1.6 % 6.4 %
PRADC 5.4 % 21.4 %