AT32UC3A3128 查看數據表（PDF） - Atmel Corporation

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AT32UC3A3128

32-bit AVR® Microcontroller

Atmel Corporation 

AT32UC3A3/A4

2.1 Processor and Architecture

2.1.1

AVR32 UC CPU

• 32-bit load/store AVR32A RISC architecture

– 15 general-purpose 32-bit registers

– 32-bit Stack Pointer, Program Counter and Link Register reside in register file

– Fully orthogonal instruction set

– Privileged and unprivileged modes enabling efficient and secure Operating Systems

– Innovative instruction set together with variable instruction length ensuring industry leading

code density

– DSP extension with saturating arithmetic, and a wide variety of multiply instructions

• Three stage pipeline allows one instruction per clock cycle for most instructions

– Byte, halfword, word and double word memory access

– Multiple interrupt priority levels

• MPU allows for operating systems with memory protection

2.1.2

Debug and Test System

• IEEE1149.1 compliant JTAG and boundary scan

• Direct memory access and programming capabilities through JTAG interface

• Extensive On-Chip Debug features in compliance with IEEE-ISTO 5001-2003 (Nexus 2.0) Class 2+

– Low-cost NanoTrace supported

• Auxiliary port for high-speed trace information

• Hardware support for six Program and two data breakpoints

• Unlimited number of software breakpoints supported

• Advanced Program, Data, Ownership and Watchpoint trace supported

2.1.3

Peripheral DMA Controller

• Transfers from/to peripheral to/from any memory space without intervention of the processor

• Next Pointer Support, forbids strong real-time constraints on buffer management

• Eight channels and 24 Handshake interfaces

– Two for each USART

– Two for each Serial Synchronous Controller (SSC)

– Two for each Serial Peripheral Interface (SPI)

– One for ADC

– Four for each TWI Interface

– Two for each Audio Bit Stream DAC

2.1.4

Bus System

• High Speed Bus (HSB) matrix with 7 Masters and 10 Slaves handled

– Handles Requests from

• Masters: the CPU (Instruction and Data Fetch), PDCA, CPU SAB, USBB, DMACA

• Slaves: the internal Flash, internal SRAM, Peripheral Bus A, Peripheral Bus B, External

Bus Interface (EBI), Advanced Encrytion Standard (AES)

– Round-Robin Arbitration (three modes supported: no default master, last accessed default

master, fixed default master)

– Burst breaking with Slot Cycle Limit

– One address decoder provided per master

• Peripheral Bus A able to run on at divided bus speeds compared to the High Speed Bus

5

32072C–AVR32–2010/03

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