1. 嵌入式微控制器和微处理器
   8位单片机
   16 位单片机
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   DSP 数字信号处理
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   非易失性存储器NVRAM
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   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
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5. 数据转换器
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6. 电源管理器件
   标准线性电源
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   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

AT91SAM7A3

AT91SAM7A3 描述

The AT91SAM7A3 is a Flash microcontroller based on the 32-bit ARM7TDMI RISC processor optimized for embedded control. It features 256K bytes of embedded high-speed Flash and 32K bytes of SRAM.

Its extensive peripheral set includes two CAN 2.0B Controllers, 8-channel 20-bit PWM Controller, nine 16-bit general purpose Timers, 16-channel 10-bit ADCs, a USB 2.0 Full Speed Device Port, MCI, USARTs, SPI, SSC and TWI. Its Peripheral DMA Controller channels eliminate processor bottlenecks during peripheral-to-memory transfers. Its System Controller manages interrupts, clocks, power, time, debug and reset, significantly reducing the external chip count and minimizing power consumption. In industrial temperature, worse case conditions the maximum clock frequency is 60MHz. Typical core supply is 1.8V, I/Os are supplied at 1.8V or 3.3V and are 5V tolerant. An integrated Voltage Regulator permits single supply at 3.3V. The AT91SAM7A3 is supplied in a 100-lead LQFP Green package. It is supported by an Evaluation Board and extensive application development tools. The AT91SAM7A3 is a general-purpose microcontroller, particularly suited to real-time embedded industrial control applications that require CAN networking. AT91SAM7A3 主要参数

1. Status: Production
2. Flash (Bytes):256K
3. SRAM (Bytes):32K
4. CAN:2
5. USB Device   :FS
6. USART/DBGU   : -/1
7. 10-bit ADC Channel:16
8. Max. Clock Speed ( :60
9. PWM Controller   :8
10. I/O Pins   :62
11. Peripheral DMA Cha:19
12. Enhanced USART   :3
13. SPI:2
14. TWI :1
15. SSC:2
16. MCI:1
17. 16-bit Timers   :9
18. Period Interval Ti   :1
19. Watchdog Timer:1
20. RTC/RTT   :-/1
21. Power-On-Reset   :1
22. On-chip RC Oscilla   :1
23. Crystal Oscillator   :1/1
24. ARM Core   :7TDMI
25. MMU/MPU   :MPU
26. I/O Voltage Domain   :3.3
27. Single Supply   : Y
28. 绿色封装 : LQFP 100

AT91SAM7A3 特性

• Incorporates the ARM7TDMI ® ARM® Thumb® Processor
  – High-performance 32-bit RISC Architecture
  – High-density 16-bit Instruction Set
  – Leader in MIPS/Watt
• EmbeddedICE™ In-circuit Emulation, Debug Communication Channel Support
• 256 Kbytes of Internal High-speed Flash, Organized in 1024 Pages of 256 Bytes
  – Single Cycle Access at Up to 30 MHz in Worst Case Conditions
  – Prefetch Buffer Optimizing Thumb Instruction Execution at Maximum Speed
  – Page Programming Time: 6 ms, Including Page Auto-erase, Full Erase Time: 15 ms
  – 10,000 Write Cycles, 10-year Data Retention Capability, Sector Lock Capabilities
• 32K Bytes of Internal High-speed SRAM, Single-cycle Access at Maximum Speed
• Memory Controller (MC)
  – Embedded Flash Controller, Abort Status and Misalignment Detection
  – Memory Protection Unit
• Reset Controller (RSTC)
  – Based on Three Power-on Reset Cells
  – Provides External Reset Signal Shaping and Reset Sources Status
• Clock Generator (CKGR)
  – Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and One PLL
• Power Management Controller (PMC)
  – Power Optimization Capabilities, including Slow Clock Mode (Down to 500 Hz), Idle
  Mode, Standby Mode and Backup Mode
  – Four Programmable External Clock Signals
• Advanced Interrupt Controller (AIC)
  – Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
  – Four External Interrupt Sources and One Fast Interrupt Source, Spurious Interrupt
  Protected
• Debug Unit (DBGU)
  – 2-wire UART and Support for Debug Communication Channel interrupt
• Periodic Interval Timer (PIT)
  – 20-bit Programmable Counter plus 12-bit Interval Counter
• Windowed Watchdog (WDT)
  – 12-bit key-protected Programmable Counter
  – Provides Reset or Interrupt Signal to the System
  – Counter May Be Stopped While the Processor is in Debug Mode or in Idle State
• Real-time Timer (RTT)
  – 32-bit Free-running Counter with Alarm
  – Runs Off the Internal RC Oscillator
• Two Parallel Input/Output Controllers (PIO)
  – Sixty-two Programmable I/O Lines Multiplexed with up to Two Peripheral I/Os
  – Input Change Interrupt Capability on Each I/O Line
  – Individually Programmable Open-drain, Pull-up resistor and Synchronous Output
• Shutdown Controller (SHDWC)
  – Programmable Shutdown Pin and Wake-up Circuitry
• Two 32-bit Battery Backup Registers for a Total of 8 Bytes
• One 8-channel 20-bit PWM Controller (PWMC)
• One USB 2.0 Full Speed (12 Mbits per Second) Device Port
  – On-chip Transceiver, 2376-byte Configurable Integrated FIFOs
• Nineteen Peripheral DMA Controller (PDC) Channels
• Two CAN 2.0B Active Controllers, Supporting 11-bit Standard and 29-bit Extended Identifiers
  – 16 Fully Programmable Message Object Mailboxes, 16-bit Time Stamp Counter
• Two 8-channel 10-bit Analog-to-Digital Converter
• Three Universal Synchronous/Asynchronous Receiver Transmitters (USART)
  – Individual Baud Rate Generator, IrDA® Infrared Modulation/Demodulation
  – Support for ISO7816 T0/T1 Smart Card, Hardware Handshaking, RS485 Support
• Two Master/Slave Serial Peripheral Interfaces (SPI)
  – 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects
• Three 3-channel 16-bit Timer/Counters (TC)
  – Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel
  – Double PWM Generation, Capture/Waveform Mode, Up/Down Capability
• Two Synchronous Serial Controllers (SSC)
  – Independent Clock and Frame Sync Signals for Each Receiver and Transmitter
  – I²S Analog Interface Support, Time Division Multiplex Support
  – High-speed Continuous Data Stream Capabilities with 32-bit Data Transfer
• One Two-wire Interface (TWI)
  – Master Mode Support Only, All Two-wire Atmel EEPROM’s Supported
• Multimedia Card Interface (MCI)
  – Compliant with Multimedia Cards and SD Cards
  – Automatic Protocol Control and Fast Automatic Data Transfers with PDC, MMC and SDCard Compliant
• IEEE® 1149.1 JTAG Boundary Scan on All Digital Pins
• Required Power Supplies
  – Embedded 1.8V Regulator, Drawing up to 130 mA for the Core and the External Components, Enables 3.3V Single Supply
  Mode
  – 3.3V VDD3V3 Regulator, I/O Lines and Flash Power Supply
  – 1.8V VDD1V8 Output of the Voltage Regulator and Core Power Supply
  – 3V to 3.6V VDDANA ADC Power Supply
  – 3V to 3.6V VDDBU Backup Power Supply
• 5V-tolerant I/Os
• Fully Static Operation: Up to 60 MHz at 1.65V and 85°C Worst Case Conditions
• Available in a 100-lead LQFP Green Package

AT91SAM7A3 订购型号

AT91SAM7A3 技术支持

1. AT91SAM7A3 数据手册 DataSheet 下载. PDF
2. AT91SAM7A3 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