ATMEGA165 ATMEL [ATMEL Corporation], ATMEGA165 Datasheet - Page 3

• Manufacturer Part Number: ATMEGA165
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Overview
The ATmega165 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 ATmega165 achieves throughputs approaching 1 MIPS per MHz allowing
the system designer to optimize power consumption versus processing speed.
Block Diagram
Figure 2. Block Diagram
2573AS–AVR–06/04
AREF
AVCC
GND
VCC
ON-CHIP DEBUG
PROGRAMMING
BOUNDARY-
JTAG TAP
LOGIC
SCAN
DATA REGISTER
DATA REGISTER
USART
PORTE
PORTF
AVR CPU
PORTF DRIVERS
PORTE DRIVERS
PF0 - PF7
PE0 - PE7
INSTRUCTION
INSTRUCTION
PROGRAM
COUNTER
PROGRAM
REGISTER
CONTROL
DECODER
SERIAL INTERFACE
FLASH
LINES
ADC
REG. PORTE
REG. PORTF
UNIVERSAL
DATA DIR.
DATA DIR.
DATA REGISTER
REGISTERS
REGISTER
PURPOSE
GENERAL
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
INTERRUPT
COUNTERS
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.
ATmega165/V
DATA REG.
PORTG
PORTG DRIVERS
PG0 - PG4
REG. PORTG
DATA DIR.
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