ATMEGA644A-MU Atmel, ATMEGA644A-MU Datasheet - Page 4
![IC MCU AVR 64K FLASH 44VQFN](/photos/12/13/121316/313-44-qfn_sml.jpg)
ATMEGA644A-MU
Manufacturer Part Number
ATMEGA644A-MU
Description
IC MCU AVR 64K FLASH 44VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644A-MU
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-VQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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1.3
8272A–AVR–01/10
Pinout - VFBGA for ATmega164A/164PA/324A/324PA
Figure 1-3.
Table 1-2.
164A/164PA/324A/324PA/644A/644PA/1284/1284P
G
A
B
C
D
E
F
A
B
C
D
E
F
G
1
VFBGA - Pinout
BGA - Pinout
XTAL1
GND
GND
GND
VCC
PB6
PD2
2
1
Top view
3
4
RESET
XTAL2
PD1
PD3
PD4
PB4
PB5
2
5
6
7
VCC
PD0
PB2
PB3
PB7
PD5
PD6
3
GND
GND
GND
PB0
PB1
PD7
PC0
4
7
6
Bottom view
5
VCC
PC5
PC2
PC1
PA0
PA1
PA4
5
4
3
PC4
PC3
PC7
PA2
PA3
PA6
PA7
2
6
1
AREF
AVCC
GND
GND
GND
PC6
PA5
A
B
C
D
E
F
G
7
4
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