ATMEGA644PV-20AU Atmel, ATMEGA644PV-20AU Datasheet - Page 368
![IC MCU AVR 64K FLASH 44-TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA644PV-20AU
Manufacturer Part Number
ATMEGA644PV-20AU
Description
IC MCU AVR 64K FLASH 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644PV-20AU
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
32
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
4K 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
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Part Number
Manufacturer
Quantity
Price
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26.2.3
Example
8011O–AVR–07/10
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
page 48
Table 26-3.
Table 26-4.
It is possible to calculate the typical current consumption based on the numbers from
on page 368
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 9.7% for the TIMER1, 17.7% for the ADC, and 10.4% for the SPI module. Reading from
Figure 26-53 on page
and F = 1 MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI
enabled, gives:
PRR bit
PRUSART1
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRADC
PRSPI
PRR bit
PRUSART1
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRADC
PRSPI
CC
= 2.0V and F = 1 MHz. From
for details.
for other V
Additional Current Consumption for the different I/O modules (absolute values)
Additional Current Consumption (percentage) in Active and Idle mode
Typical numbers
Additional Current consumption
compared to Active with external
clock (see
363
363)
V
CC
I
CC
365, we find that the idle current consumption is ~0.125 mA at V
and
= 2V, F = 1 MHz
CC
total
14.6 µA
11.7 µA
21.1 µA
10.7 µA
7.8 µA
7.6 µA
9.9 µA
6.0 µA
Figure 26-49 on page
and frequency settings than listed in
≈
Figure 26-48 on page
0.125 mA (1+ 0.097 + 0.177 + 0.104)
2.1 %
2.2%
3.1%
3.8%
2.6%
1.6%
4.8%
2.8%
Table 26-4 on page
⋅
V
CC
= 3V, F = 4 MHz
114.5 µA
50.0 µA
51.2 µA
73.3 µA
91.3 µA
64.0 µA
39.2 µA
67.7 µA
ATmega164P/324P/644P
Additional Current consumption
compared to Idle with external
clock (see
365
366)
”PRR – Power Reduction Register” on
368, third column, we see that we need
and
Figure 26-54 on page
Table 26-3 on page
≈
Figure 26-53 on page
0.172 mA
V
11.2%
14.1%
17.7%
10.4%
7.6%
8.0%
9.7%
6.1%
CC
= 5V, F = 8 MHz
215.5 µA
237.2 µA
309.3 µA
393.0 µA
271.7 µA
176.3 µA
437.2 µA
288.2 µA
368.
Table 26-4
CC
= 2.0V
368
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