ATMEGA48PA-AN Atmel, ATMEGA48PA-AN Datasheet - Page 404

• Manufacturer Part Number: ATMEGA48PA-AN
• Description: MCU AVR 4KB FLASH 20MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48PA-AN

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

29.4.3
Example
8161D–AVR–10/09
ATmega328P Supply Current of IO 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
details.
Table 29-7.
Table 29-8.
It is possible to calculate the typical current consumption based on the numbers from
on page 404
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 14.5% for the TIMER1, 22.1% for the ADC, and 15.7% for the SPI module. Reading from
Figure 29-145 on page
2.0V and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI
enabled, gives:
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
CC
= 2.0V and F = 1MHz. From
for other V
ATmega328P: Additional Current Consumption for the different I/O modules
(absolute values)
ATmega328P: Additional Current Consumption (percentage) in Active and Idle
mode
Typical numbers
Additional Current consumption
compared to Active with external
clock (see
399
399)
V
CC
and
I
CC
= 2V, F = 1MHz
CC
402, we find that the idle current consumption is ~0.055 mA at V
7.34 µA
6.19 µA
1.89 µA
6.94 µA
3.20 µA
7.34 µA
8.66 µA
total
Figure 29-140 on page
and frequency settings than listed in
≈
Figure 29-139 on page
0.045 mA (1 + 0.145 + 0.221 + 0.157)
1.4 %
3.0 %
3.3 %
2.7 %
0.9 %
2.9 %
4.1 %
ATmega48PA/88PA/168PA/328P
Table 29-8 on page
⋅
V
CC
= 3V, F = 4MHz
22.17 µA
50.79 µA
41.25 µA
14.28 µA
43.84 µA
61.80 µA
46.55 µA
”Power Reduction Register” on page 42
Additional Current consumption
compared to Idle with external
clock (see
401
402)
404, third column, we see that we need
and
Figure 29-145 on page
≈
Table 29-7 on page
Figure 29-144 on page
0.069 mA
V
16.6 %
17.8 %
14.5 %
15.7 %
22.1 %
4.8 %
7.8%
CC
= 5V, F = 8MHz
100.25 µA
199.25 µA
224.25 µA
176.25 µA
186.50 µA
295.38 µA
61.13 µA
404.
Table 29-8
CC
404
for
=