ATmega169P
2. Overview
The ATmega169P is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By execut-
ing powerful instructions in a single clock cycle, the ATmega169P achieves throughputs approaching 1 MIPS per MHz
allowing the system designer to optimize power consumption versus processing speed.
2.1
Block Diagram
Figure 2-1. Block Diagram
PF0 - PF7
PA0 - PA7
PC0 - PC7
VCC
GND
PORTA DRIVERS
PORTF DRIVERS
PORTC DRIVERS
DATA REGISTER
PORTF
DATA DIR.
REG. PORTF
DATA REGISTER
PORTA
DATA DIR.
REG. PORTA
DATA REGISTER
PORTC
DATA DIR.
REG. PORTC
8-BIT DATA BUS
AVCC
CALIB. OSC
INTERNAL
OSCILLATOR
ADC
AREF
OSCILLATOR
PROGRAM
COUNTER
STACK
POINTER
WATCHDOG
TIMER
JTAG TAP
TIMING AND
CONTROL
LCD
CONTROLLER/
DRIVER
PROGRAM
FLASH
MCU CONTROL
REGISTER
SRAM
ON-CHIP DEBUG
BOUNDARY-
SCAN
INSTRUCTION
REGISTER
TIMER/
COUNTERS
GENERAL
PURPOSE
REGISTERS
X
Y
Z
PROGRAMMING
LOGIC
INSTRUCTION
DECODER
INTERRUPT
UNIT
CONTROL
LINES
ALU
EEPROM
STATUS
REGISTER
AVR CPU
UNIVERSAL
SERIAL INTERFACE
SPI
USART
DATA REGISTER
PORTE
DATA DIR.
REG. PORTE
DATA REGISTER
PORTB
DATA DIR.
REG. PORTB
DATA REGISTER
PORTD
DATA DIR.
REG. PORTD
DATA REG. DATA DIR.
PORTG
REG. PORTG
PORTB DRIVERS
PORTD DRIVERS
PORTG DRIVERS
PORTE DRIVERS
PE0 - PE7
PB0 - PB7
PD0 - PD7
PG0 - PG4
3
8018A–AVR–03/06
ATMEL [ ATMEL ]
