ATA664251_14 Datasheet, PDF (48/290 Pages) ATMEL Corporation – 16K Flash Microcontroller with LIN Transceiver

5.2.6
Resources
A comprehensive set of development tools, application notes and datasheets are available for download on
http://www.atmel.com/avr.
5.2.7
About Code Examples
This documentation contains simple code examples that briefly show how to use various parts of the device. These code
examples assume that the part specific header file is included before compilation. Be aware that not all C compiler vendors
include bit definitions in the header files and interrupt handling in C is compiler dependent. Please confirm with the
C compiler documentation for more details.
5.3 AVR CPU Core
5.3.1
Overview
This section discusses the AVR^® core architecture in general. The main function of the CPU core is to ensure correct
program execution. The CPU must therefore be able to access memories, perform calculations, control peripherals, and
handle interrupts.
Figure 5-2. Block Diagram of the AVR Architecture
Data Bus 8-bit
Flash
Program
Memory
Instruction
Register
Instruction
Decoder
Control Lines
Program
Counter
Status and
Control
32 x 8
General
Purpose
Registers
ALU
Data
SRAM
Interrupt
Unit
Watchdog
Timer
A.D.C.
Analog
Comparator
I/O Module 1
I/O Module 2
EEPROM
I/O Module n
I/O Lines
48 ATA664251 [DATASHEET]
9269E–AUTO–06/14