ATmega64A Atmel Corporation, ATmega64A Datasheet - Page 3

• Manufacturer Part Number: ATmega64A
• Manufacturer: Atmel Corporation

Specifications of ATmega64A

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

2. Overview
2.1
Figure 2-1.
8160CS–AVR–07/09
AVCC
AREF
PEN
GND
VCC
Block Diagram
ON-CHIP DEBUG
PROGRAMMING
BOUNDARY-
JTAG TAP
Block Diagram
LOGIC
SCAN
DATA REGISTER
DATA REGISTER
PORTE
PORTF
USART0
PORTF DRIVERS
PORTE DRIVERS
PE0 - PE7
PF0 - PF7
The ATmega64A is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC
architecture. By executing powerful instructions in a single clock cycle, the ATmega64A achieves
throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power con-
sumption versus processing speed.
The AVR core combines a rich instruction set with 32 general purpose working registers. All the
32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent
registers to be accessed in one single instruction executed in one clock cycle. The resulting
architecture is more code efficient while achieving throughputs up to ten times faster than con-
ventional CISC microcontrollers.
The ATmega64A provides the following features: 64K bytes of In-System Programmable Flash
with Read-While-Write capabilities, 2K bytes EEPROM, 4K bytes SRAM, 53 general purpose I/O
INSTRUCTION
INSTRUCTION
PROGRAM
COUNTER
PROGRAM
REGISTER
CONTROL
DECODER
FLASH
LINES
ADC
REG. PORTE
REG. PORTF
DATA DIR.
DATA DIR.
REGISTERS
PURPOSE
REGISTER
GENERAL
POINTER
STATUS
STACK
SRAM
DATA REGISTER
DATA REGISTER
ALU
X
Y
Z
PORTA
PORTB
PORTB DRIVERS
PORTA DRIVERS
PA0 - PA7
PB0 - PB7
REG. PORTB
REG. PORTA
DATA DIR.
DATA DIR.
MCU CONTROL
OSCILLATOR
WATCHDOG
COUNTERS
INTERRUPT
REGISTER
INTERNAL
EEPROM
TIMER/
TIMER
UNIT
SPI
DATA REGISTER
DATA REGISTER
PORTC
OSCILLATOR
OSCILLATOR
TIMING AND
CALIB. OSC
CONTROL
PORTD
PORTC DRIVERS
USART1
PC0 - PC7
PORTD DRIVERS
PD0 - PD7
REG. PORTC
DATA DIR.
2-WIRE SERIAL
REG. PORTD
INTERFACE
DATA DIR.
8-BIT DATA BUS
DATA REG.
PORTG
PORTG DRIVERS
ATmega64A
PG0 - PG4
REG. PORTG
DATA DIR.
RESET
XTAL1
XTAL2
3