2.
Overview
The Atmel® ATmega16/32/64/M1/C1 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 Atmel ATmega16/32/64/M1/C1 achieves
throughputs approaching 1MIPS per MHz allowing the system designer to optimize power consumption versus processing
speed.
2.1
Block Diagram
Figure 2-1. Block Diagram
Data Bus 8-bit
Program
Counter
Status and
Control
Interrupt
Unit
Flash
Program
Memory
SPI
Unit
32 x 8
General
Purpose
Registers
Instruction
Register
Watchdog
Timer
4 Analog
Comparators
Instruction
Decoder
ALU
HW LIN/UART
Timer 0
Timer 1
ADC
Control Lines
Data
SRAM
EEPROM
I/O Lines
DAC
MPSC
Current Source
CAN
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 conventional CISC microcontrollers.
The Atmel ATmega16/32/64/M1/C1 provides the following features: 16K/32K/64K bytes of In-System Programmable Flash
with Read-while-write capabilities, 512/1024/2048 bytes EEPROM, 1024/2048/4096 bytes SRAM, 27 general purpose I/O
lines, 32 general purpose working registers, one Motor Power Stage Controller, two flexible Timer/Counters with compare
modes and PWM, one UART with HW LIN, an 11-channel 10-bit ADC with two differential input stages with programmable
gain, a 10-bit DAC, a programmable Watchdog Timer with Internal Individual Oscillator, an SPI serial port, an On-chip Debug
system and four software selectable power saving modes.
8
ATmega16/32/64/M1/C1 [DATASHEET]
7647O–AVR–01/15
MICROCHIP [ MICROCHIP ]
