ATMEGA645A-AU Atmel, ATMEGA645A-AU Datasheet - Page 402
![IC MCU AVR 64K FLASH 64TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA645A-AU
Manufacturer Part Number
ATMEGA645A-AU
Description
IC MCU AVR 64K FLASH 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA645A-AU
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
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA645A-AUR
Manufacturer:
HONEYWELL
Quantity:
101
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29.3.3.1
402
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
Example 1
are controlled by the Power Reduction Register. See
details.
Table 29-5.
Table 29-6.
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
F = 1MHz. The total current consumption in idle mode with USART0, TIMER1, and SPI enabled,
gives:
PRR bit
PRADC
PRUSART0
PRSPI
PRTIM1
PRR bit
PRADC
PRUSART0
PRSPI
PRTIM1
Figure
CC
CC
29-6, we find that the idle current consumption is ~0.09 mA at V
and frequency settings than listed in
ATmega325A: Additional Current Consumption for the different I/O modules
(absolute values)
ATmega325A: Additional Current Consumption (percentage) in Active and Idle
mode
= 3.0V and F = 1MHz. From
Additional Current consumption
compared to Active with external clock
(see
Typical numbers
7 µA
6.9 µA
6.6 µA
7 µA
V
Figure 29-1
CC
I
CC
= 2V, F = 1MHz
total
≈
0.09mA
and
3.2%
3.4%
3.3%
3.4%
Figure
•
(
1
+
Table
0.131
29-2)
44 µA
43.5 µA
47 µA
47 µA
V
CC
+
Table
29-2, second column, we see that we need to
0.13
= 3V, F = 4MHz
”Power Reduction Register” on page 41
+
29-1.
Additional Current consumption
compared to Idle with external clock
(see
0.132
Figure 29-6
)
≈
0.13mA
195 µA
210 µA
205 µA
206 µA
12.7%
13.1%
13.0%
13.2%
and
V
CC
Figure
= 5V, F = 8MHz
CC
8285B–AVR–03/11
= 3.0V and
29-7)
Table 29-2
for
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