ATMEGA644-20AU Atmel, ATMEGA644-20AU Datasheet - Page 367
ATMEGA644-20AU
Manufacturer Part Number
ATMEGA644-20AU
Description
IC AVR MCU FLASH 64K 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644-20AU
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/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
2.7 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, ATAVRRZ541, ATAVRRAVEN, ATAVRRZRAVEN, ATAVRRZUSBSTICK, ATAVRRZ201
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
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
Package Type
TQFP
Package
44TQFP
Family Name
ATmega
Maximum Speed
20 MHz
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
Company:
Part Number:
ATMEGA644-20AU
Manufacturer:
OKI
Quantity:
101
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33.5
33.6
33.7
33.8
33.9
33.10 Rev. 2593E - 04/06
2593N–AVR–07/10
Rev. 2593J - 09/06
Rev. 2593I - 08/06
Rev. 2593H - 07/06
Rev. 2593G - 06/06
Rev. 2593F - 04/06
1.
2.
3.
4.
5.
1.
2.
3.
1.
2.
3.
4.
1.
2.
3.
1.
2.
3.
1.
Updated
Updated
Updated
Updated
Updated
14-4 on page
page 147
Updated note in
Updated
Updated
Updated
Updated
Updated
Updated
Updated
Updated
Updated
Updated typos.
Updated
Updated
Updated
”Calibrated Internal RC Oscillator” on page
”Fast PWM Mode” on page
”Device Identification Register” on page
”Signature Bytes” on page
Table 13-3 on page 97,Table 13-6 on page
Table 7-2 on page
”Timer/Counter Prescaler” on page
”Fast PWM Mode” on page
Figure 14-7 on page
Table 24-7 on page
”Packaging Information” on page
”Calibrated Internal RC Oscillator” on page
”OSCCAL – Oscillator Calibration Register” on page
Table 26-1 on page
”ADC Noise Reduction Mode” on page
”Power-down Mode” on page
”Calibrated Internal RC Oscillator” on page
and
126,
Table 15-8 on page
”Pin Configurations” on page
Table 14-5 on page
29,
280.
319.
118.
Table 12-11 on page 80
148.
287.
117.
117.
40.
127,
362.
145.
Table 15-3 on page
2.
40.
260.
98,
33.
33.
33.
Table 14-3 on page
and
Table 24-7 on page
37.
ATmega644
146,
Table 15-6 on
126,
Table
280.
367
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