ATmega48/88/168
1.1
Disclaimer
Typical values contained in this datasheet are based on simulations and characterization of
other AVR microcontrollers manufactured on the same process technology. Min and Max values
will be available after the device is characterized.
2. Overview
The ATmega48/88/168 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
ATmega48/88/168 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
Watchdog
Timer
Power
Supervision
POR / BOD &
RESET
debugWIRE
Watchdog
Oscillator
PROGRAM
LOGIC
Oscillator
Circuits /
Clock
Flash
SRAM
Generation
CPU
EEPROM
AVCC
AREF
GND
2
8bit T/C 0
8bit T/C 2
16bit T/C 1
A/D Conv.
Analog
Comp.
Internal
Bandgap
6
USART 0
PORT D (8)
PD[0..7]
SPI
PORT B (8)
PB[0..7]
TWI
PORT C (7)
PC[0..6]
RESET
XTAL[1..2]
ADC[6..7]
3
2545E–AVR–02/05
MICROCHIP [ MICROCHIP ]
