34.3 ATmega328PB 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.
| PRR bit | Typical Numbers | ||
|---|---|---|---|
| VCC = 2V, F = 1 MHz | VCC = 3V, F = 4 MHz | VCC = 5V, F = 8 MHz | |
| PRUSART1 | 4.8 μA | 28.7 μA | 107.8 μA |
| PRUSART0 | 4.7 μA | 28.1 μA | 110.9 μA |
| PRTWI | 7.2 μA | 44.2 μA | 169.2 μA |
| PRTIM2 | 5.7 μA | 38.6 μA | 140 μA |
| PRTIM1 | 3.8 μA | 22.9 μA | 88.8 μA |
| PRTIM0 | 1.9 μA | 11.6 μA | 45.2 μA |
| PRSPI | 5.7 μA | 38.3 μA | 159.8 μA |
| PRADC | 6.5 μA | 44.3 μA | 165.11 μA |
| PRTIM4 | 4.1 μA | 28.2 μA | 95.5 μA |
| PRTIM3 | 6.7 μA | 47.1 μA | 164.1 μA |
| PRSPI1 | 5.8 μA | 40 μA | 157.9 μA |
| PRPTC | 4.7 μA | 27.8 μA | 108.2 μA |
It is possible to calculate the typical current consumption based on the numbers from the above table for other VCC and frequency settings than listed there.