ATMEGA644A-PU Atmel, ATMEGA644A-PU Datasheet - Page 4

• Manufacturer Part Number: ATMEGA644A-PU
• Description: IC MCU AVR 64K FLASH 40PDIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644A-PU

• 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: 40-DIP (0.600", 15.24mm)
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: JTAG, TWI, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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