1. 嵌入式微控制器和微处理器
   8位单片机
   16 位单片机
   32位ARM核微处理器
   AVR 单片机
   DSP 数字信号处理
   其他专用单片机
2. 存储器
   非易失性存储器NVRAM
   同步动态存储器SDRAM
   EEPROM 存储器
   Flash 存储器
   其他
3. 系统管理器件
   监控电路（电压监控器）
   低功耗复位器
4. Interface 接口器件
   RS-232接口
   RS-485/422接口
   CAN接口
   USB 接口
   LVDS与RF接口
   其他接口
5. 数据转换器
   模数转换器
   数模转换器
   音频与触摸屏控制器
6. 电源管理器件
   标准线性电源
   低压差稳压器
   DC/DC转换器
   AC/DC转换器
   电压基准
   电池管理
   PWM控制器
   电源模块与功率器件
   其它
7. 时钟管理 定时器 计数器
8. 数字电位器 DCP
9. 开关器件
10. 传感器
11. 可编程逻辑器件
    FPGA 现场可编程逻辑
    CPLD 复杂可编程逻辑器件
    其它 可编程系统器件
12. 逻辑电路
13. 其他

AT91SAM7A2

AT91SAM7A2 描述

The AT91SAM7A2 is based on the ARM7TDMI embedded processor. This processor has a high-performance 32-bit RISC architecture with a high-density 16-bit instruction set and very low power consumption.
In addition, a large number of internally banked registers result in very fast exception handling, making the device ideal for real-time control applications.
The AT91SAM7A2 has a direct connection to off-chip memory, including Flash,through the fully programmable External Bus Interface.
An 8-level priority vectored Interrupt Controller in conjunction with the Peripheral Data Controller significantly improves the real time performance of the device. The device is manufactured using high-density CMOS technology.
By combining the ARM7TDMI processor with an on-chip SRAM, and a wide range of peripheral functions, including USART, SPI, CAN Controllers, Timer Counter and Analog- to-Digital Converters, on a monolithic chip, the AT91SAM7A2 is a powerful device that provides a flexible, cost-effective solution to many compute-intensive embedded control applications in the automotive and industrial world.

The AT91SAM7A2 features a 27 MIPS ARM7TDMI processor with 16K bytes of SRAM, fully programmable External Bus Interface (EBI) and a rich peripheral set including four CAN controllers (2.0A and 2.0B Full CAN) and four-channel 16-bit Pulse Width Modulation. It provides a powerful, cost-effective solution to many compute-intensive embedded control applications in the automotive and industrial world.

AT91SAM7A2 主要参数

1. Status: Production
2. SRAM (Bytes) :16k
3. CAN: 4
4. USART/DBGU   : 2
5. 10-bit ADC Channel   : 16
6. Max. Clock Speed ( :30
7. PWM Controller :4
8. I/O Pins   :57
9. External Bus Inter   :1
10. Peripheral DMA Cha   :11
11. SPI:1
12. 16-bit Timers   :10
13. Watchdog Timer   :1
14. Crystal Oscillator   :2/2
15. ARM Core   :7TDMI
16. 绿色封装: LQFP 176

AT91SAM7A2 特性

• ARM7TDMI® ARM® Thumb® Processor Core
  – High Performance 32-bit RISC
  – High-density 16-bit Instruction set (Thumb)
  – Leader in MIPS/Watt
  – Embedded ICE (In Circuit Emulation)
• 16 Kbytes Internal SRAM
• Fully Programmable External Bus Interface (EBI)
  – Maximum External Address Space of 6 Mbytes, Up to Four Chip Select Lines
• 8-level Priority, Vectored Interrupt Controller
  – Three External Interrupts Including One Fast Interrupt Line
• Ten Channel Peripheral Data Controller (PDC)
• 57 Programmable I/O Lines
• Four 16-bit General Purpose Timers (GPT)
  – Three Configurable Modes: Counter, PWM, Capture
  – Four External Clock Inputs, Three Multi-purpose I/O Pins per Timer
• Four 16-bit Simple Timers (ST)
• Four Channel 16-bit Pulse Width Modulation (PWM)
• Four CAN Controllers 2.0A and 2.0B Full CAN
  – One with 32 Buffers, Three with 16 Buffers
• Two USARTs
  – Support for J1587 and LIN Protocols
• One Master/Slave SPI Interface
  – 8 to 16-bit Programmable Data Length
  – Four External Serial Peripheral Chip Selects
• Two 8-channel 10-bit Analog to Digital Converters (ADC)
• Two 16-bit Capture Modules (CAPT)
• Programmable Watch Timer (WT)
• Programmable Watchdog (WD)
• Power Management Controller (PMC)
  – 32 kHz Oscillator, Main Oscillator and PLL
• IEEE 1149.1 JTAG Boundary-scan on all Digital Pins
• Fully Static Operation: 0 Hz to 30 MHz at VDDCORE=3.3V, 85°C
• 3.0V to 5.5V Operating Voltage Range
• 3.0V to 3.6V Core, Memory and Analog Voltage Range
• -40° to +85°C Operating Temperature Range
• Available in a 176-lead LQFP Package

AT91SAM7A2 技术支持

1. AT91SAM7A2 数据手册 DataSheet 下载. PDF
2. AT91SAM7A2 英文数据手册 DataSheet 下载. PDF

AT91系列ARM单片机技术支持

1. 《技术手册》AT91M55800A Summary.PDF
2. 《技术手册》AT91RM9200 相关技术资料.PDF
3. 《技术手册》AT91SAM7A2 Summary.PDF
4. 《技术手册》AT91FR40162S Summary.PDF
5. 《技术手册》http://www.atmel.com/dyn/resources/prod_documents/6120S.pdf .PDF