ATmega16(L)
Overview
The ATmega16 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
ATmega16 achieves throughputs approaching 1 MIPS per MHz allowing the system
designer to optimize power consumption versus processing speed.
Block Diagram
Figure 2. Block Diagram
PA0 - PA7
PC0 - PC7
VCC
PORTA DRIVERS/BUFFERS
PORTA DIGITAL INTERFACE
PORTC DRIVERS/BUFFERS
PORTC DIGITAL INTERFACE
GND
AVCC
AREF
ADC
INTERFACE
MUX &
ADC
TWI
TIMERS/
COUNTERS
OSCILLATOR
PROGRAM
COUNTER
STACK
POINTER
PROGRAM
FLASH
INTERNAL
OSCILLATOR
SRAM
XTAL1
INSTRUCTION
REGISTER
WATCHDOG
TIMER
GENERAL
PURPOSE
REGISTERS
OSCILLATOR
XTAL2
X
Y
Z
INSTRUCTION
DECODER
MCU CTRL.
& TIMING
RESET
INTERNAL
CALIBRATED
OSCILLATOR
CONTROL
LINES
INTERRUPT
UNIT
ALU
STATUS
REGISTER
AVR CPU
EEPROM
USART
PROGRAMMING
LOGIC
SPI
+
-
COMP.
INTERFACE
PORTB DIGITAL INTERFACE
PORTD DIGITAL INTERFACE
PORTB DRIVERS/BUFFERS
PORTD DRIVERS/BUFFERS
PB0 - PB7
PD0 - PD7
3
2466E–AVR–10/02
ATMEL [ ATMEL ]
