ATMEGA645A-MUR Atmel, ATMEGA645A-MUR Datasheet - Page 338

• Manufacturer Part Number: ATMEGA645A-MUR
• Description: IC MCU AVR 64K FLASH 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645A-MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 54
• 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: 64-TQFP Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

29.1.3.1
29.1.4
338
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
Power-down Supply Current
Example 1
It is possible to calculate the typical current consumption based on the numbers from
for other V
Calculate the expected current consumption in idle mode with USART0, TIMER1, and SPI
enabled at V
add 13.1% for the USART0, 13.0% for the SPI, and 13.2% for the TIMER1 module. Reading
from
1MHz. The total current consumption in idle mode with USART0, TIMER1, and SPI enabled,
gives:
Figure 29-11. ATmega165A: Power-down Supply Current vs. V
Figure
1.4
1.2
0.8
0.6
0.4
0.2
CC
1
0
29-6, we find that the idle current consumption is ~0.09 mA at V
CC
1.5
and frequency settings than listed in
= 3.0V and F = 1MHz. From
2
I
CC
total
≈
2.5
0.09mA
•
3
(
1
+
Table
0.131
V
CC
3.5
(V)
+
Table
29-2, second column, we see that we need to
0.13
+
4
29-1.
0.132
)
4.5
≈
CC
0.13mA
(Watchdog Timer Disabled)
5
CC
= 3.0V and F =
5.5
8285B–AVR–03/11
-45 °C
85 °C
25 °C
Table 29-2