ATMEGA645P-AU Atmel, ATMEGA645P-AU Datasheet - Page 4
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ATMEGA645P-AU
Manufacturer Part Number
ATMEGA645P-AU
Description
IC MCU AVR 64K FLASH 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA645P-AU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
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
64-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
2. Overview
The ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P is a low-power CMOS 8-bit microcon-
troller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, this
microcontroller achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power con-
sumption versus processing speed.
2.1
Figure 2-1.
8285BS–AVR–03/11
AREF
AGND
AVCC
GND
Block Diagram
Block Diagram
VCC
ON-CHIP DEBUG
PROGRAMMING
BOUNDARY-
ATmega165A/165PA/325A/325PA/3250A/3250PA/6
JTAG TAP
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.
LOGIC
SCAN
DATA REGISTER
DATA REGISTER
USART
PORTE
PORTF
AVR CPU
PORTF DRIVERS
PORTE DRIVERS
PF0 - PF7
PE0 - PE7
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
REGISTER
COUNTER
CONTROL
DECODER
SERIAL INTERFACE
FLASH
LINES
ADC
REG. PORTE
REG. PORTF
UNIVERSAL
DATA DIR.
DATA DIR.
DATA REGISTER
REGISTERS
REGISTER
GENERAL
PURPOSE
POINTER
STATUS
STACK
SRAM
PORTB
DATA REGISTER
ALU
X
Y
Z
PORTA
PORTB DRIVERS
PB0 - PB7
PORTA DRIVERS
PA0 - PA7
REG. PORTB
DATA DIR.
REG. PORTA
DATA DIR.
MCU CONTROL
OSCILLATOR
WATCHDOG
COUNTERS
INTERRUPT
REGISTER
INTERNAL
EEPROM
TIMER/
TIMER
UNIT
SPI
8-BIT DATA BUS
DATA REGISTER
PORTD
DATA REGISTER
PORTD DRIVERS
PD0 - PD7
PORTC
OSCILLATOR
TIMING AND
CALIB. OSC
CONTROL
PORTC DRIVERS
REG. PORTD
PC0 - PC7
DATA DIR.
REG. PORTC
DATA DIR.
DATA REG.
PORTG
PORTG DRIVERS
PG0 - PG4
REG. PORTG
DATA DIR.
4