參數(shù)資料
型號(hào): MQ83C154CXXX-16P883
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44
封裝: CERAMIC, QFP-44
文件頁數(shù): 121/142頁
文件大?。?/td> 61013K
代理商: MQ83C154CXXX-16P883
8
XMEGA B3 [DATASHEET]
8074D–AVR–08/2013
6.
AVR CPU
6.1
Features
8/16-bit, high-performance Atmel AVR RISC CPU
142 instructions
Hardware multiplier
32x8-bit registers directly connected to the ALU
Stack in RAM
Stack pointer accessible in I/O memory space
Direct addressing of up to 16MB of program memory and 16MB of data memory
True 16/24-bit access to 16/24-bit I/O registers
Efficient support for 8-, 16-, and 32-bit arithmetic
Configuration change protection of system-critical features
6.2
Overview
All AVR XMEGA devices use the 8/16-bit AVR CPU. The main function of the CPU is to execute the code and perform all
calculations. The CPU is able to access memories, perform calculations, control peripherals, and execute the program in
the flash memory. Interrupt handling is described in a separate section, refer to “Interrupts and Programmable Multilevel
6.3
Architectural Overview
In order to maximize performance and parallelism, the AVR CPU uses a Harvard architecture with separate memories
and buses for program and data. Instructions in the program memory are executed with single-level pipelining. While one
instruction is being executed, the next instruction is pre-fetched from the program memory. This enables instructions to
be executed on every clock cycle. For details of all AVR instructions, refer to http://www.atmel.com/avr.
Figure 6-1.
Block Diagram of the AVR CPU architecture.
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