AT91SAM7A3 32位ARM单片机

Status Production
Flash (Bytes) 256K
SRAM (Bytes) 32K
CAN 2
RTC/RTT -/1
10-bit ADC Channels 16
Peripheral DMA Channels 19
Max. Clock Speed (MHz) 60
I/O Pins 62
Enhanced USART 3
USART/DBGU -/1
SPI 2
TWI 1
SSC 2
MCI 1
USB Device FS
PWM Controller 8
16-bit Timers 9
Period Interval Timer 1
Watchdog Timer 1
Power-On-Reset 1
On-chip RC Oscillator 1
Crystal Oscillator/PLL 39814
ARM Core 7TDMI
MMU/MPU MPU
I/O Voltage Domain (V) 3.3
Single Supply Y
Pb-Free Packages LQFP 100
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
AT91SAM7A3 订购型号
Ordering Code Package Package Type Operating Temperature Range
AT91SAM7A3-AU LQFP 100 Green Industrial (-40° C to 85° C)
AT91SAM7A3 应用技术支持与电子电路设计开发资源下载
  1. AT91SAM7A3 数据手册DataSheet 下载. PDF(简洁版)
  2. AT91SAM7A3 数据手册DataSheet 下载. PDF
  3. ARM7TDMI 技术白皮书
  4. AT91SAM 系列产品选型指南(Brochure, 2 pages, revision E, updated 2/09)
    Product selection guide to Atmel's AT91SAM microcontrollers that give immediate access to market-leading ARM processors.
  5. Atmel's ARM-based Microcontroller Excels in Real-Time (White Paper, 6 pages, revision A, updated 3/01)
    Applications such as mobile communicators, PDAs, solid-state music players and internet appliances demand the best possible real-time performance. Atmel's AT91 series of ARM-based microcontrollers incorporates a number of advanced features that enhance the real-time performance of the ARM7TDMI core, making it ideal for applications of this nature.