ATMEGA644P-20AU Atmel, ATMEGA644P-20AU Datasheet - Page 344
![IC MCU AVR 64K FLASH 44-TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA644P-20AU
Manufacturer Part Number
ATMEGA644P-20AU
Description
IC MCU AVR 64K FLASH 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets
1.ATMEGA164P-20AU.pdf
(28 pages)
2.ATMEGA164P-20AU.pdf
(439 pages)
3.ATMEGA324P-20AU.pdf
(26 pages)
Specifications of ATMEGA644P-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)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Processor Series
ATMEGA64x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
4 KB
Interface Type
2-Wire, SPI, UART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 channel
A/d Inputs
8-Channel, 10-Bit
Cpu Speed
20 MIPS
Eeprom Memory
2K Bytes
Input Output
32
Interface
2-Wire/JTAG/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
44-pin TQFP
Programmable Memory
64K Bytes
Timers
2-8-bit, 1-16-bit
Voltage, Range
2.7-5.5 V
Cpu Family
ATmega
Device Core
AVR
Device Core Size
8b
Frequency (max)
20MHz
Total Internal Ram Size
4KB
# I/os (max)
32
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Controller Family/series
AVR MEGA
No. Of I/o's
32
Eeprom Memory Size
2KB
Ram Memory Size
4KB
Rohs Compliant
Yes
For Use With
ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA644P-20AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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Example
26.1.4
8011O–AVR–07/10
Power-down Supply Current
Table 26-2.
It is possible to calculate the typical current consumption based on the numbers from
on page 344
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 10.5% for the TIMER1, 16.8% for the ADC, and 12.9% for the SPI module. Reading from
Figure 26-6 on page
and F = 1 MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI
enabled, gives:
Figure 26-11. Power-down Supply Current vs. V
PRR bit
PRUSART1
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRADC
PRSPI
CC
= 2.0V and F = 1 MHz. From
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
2
1
0
for other V
1.5
Additional Current Consumption (percentage) in Active and Idle mode
Additional Current consumption
compared to Active with external
clock (see
338
1.8%
2.4%
5.4%
4.6%
2.7%
1.6%
4.5%
3.3%
I
341, we find that the idle current consumption is ~0.115 mA at V
CC
and
2
CC
total
Figure 26-2 on page
and frequency settings than listed in
≈
Figure 26-1 on page
0.115 mA (1 + 0.105 + 0.168 + 0.129)
2.5
Table 26-2 on page
⋅
3
V
339)
CC
3.5
(V)
CC
ATmega164P/324P/644P
(Watchdog Timer Disabled).
Additional Current consumption
compared to Idle with external
clock (see
341
6.9%
9.1%
21.2%
17.4%
10.5%
6.0%
16.8%
12.9%
4
344, third column, we see that we need
and
Figure 26-7 on page
4.5
Table 26-1 on page
Figure 26-6 on page
≈
0.161 mA
5
5.5
341)
-40°C
85°C
25°C
343.
Table 26-2
CC
= 2.0V
344
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