ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 366

• Manufacturer Part Number: ATMEGA649A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, 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
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

29.1.3.1
29.1.4
8284A–AVR–10/10
Power-down Supply Current
Example 1
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
F = 1MHz. The total current consumption in idle mode with USART0, TIMER1, and SPI enabled,
gives:
Figure 29-11. ATmega169A: Power-down Supply Current vs. V
Figure 29-12. ATmega169A: Power-down Supply Current vs. V
I
CC
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
total
Figure
≈
0.09mA
1.4
1.2
0.8
0.6
0.4
0.2
20
18
16
14
12
10
1
0
8
6
4
2
0
CC
1.5
1.5
29-6, we find that the idle current consumption is ~0.09 mA at V
= 3.0V and F = 1MHz. From
•
(
1
+
0.131
2
2
+
0.13
2.5
2.5
+
0.132
3
3
)
≈
0.13mA
Table
V
V
CC
CC
3.5
3.5
(V)
(V)
29-2, second column, we see that we need to
4
4
4.5
CC
CC
4.5
(Watchdog Timer Disabled)
(Watchdog Timer Enabled
5
5
5.5
5.5
CC
-45 °C
-45 °C
85 °C
25 °C
85 °C
25 °C
= 3.0V and
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