AT91SAM9G20 32位ARM单片机

SRAM (Bytes) 2x16K
Ethernet MAC 10/100 1
Image Sensor Interface 1
USB Host 2xFS
External Bus Interface 1
RTC/RTT -/1
10-bit ADC Channels 4
Peripheral DMA Channels 24
Max. Clock Speed (MHz) 400
I/O Pins 96
SDRAM Interface 1
NAND Flash ECC 39814
Enhanced USART 4
USART/DBGU 39845
SPI 2
TWI 1
SSC 1
MCI 1
USB Device FS
High Current Pads 3
16-bit Timers 6
Period Interval Timer 1
Watchdog Timer 1
Power-On-Reset 2
On-chip RC Oscillator 1
Crystal Oscillator/PLL 39846
ARM Core 926EJ-S
Cache Memory (Bytes) 2x32K
MMU/MPU MMU
I/O Voltage Domain (V) 1.8/3.3
In-System Programming Y
Single Supply N
Pb-Free Packages LFBGA 217
AT91SAM9G20 产品描述

The AT91SAM9G20 is a pin-compatible evolution of the AT91SAM9260, offering four times the cache and on-chip SRAM memory of its predecessor, and features improved error correction for external NAND Flash as well as an enlarged Ethernet FIFO that improves latency. Achieving half the power consumption at twice the clock frequency of the AT91SAM9260, it consumes only 80 mW in full-power mode with all peripherals turned on. The AT91SAM9G20 is targeted at power-constrained applications that also need high performance. These include point-of-sale terminals, building automation, security cameras and bar code readers.

The AT91SAM9G20 is based on the ARM926EJ-S processor, with a clock speed of 400MHz. It features 32K byte instruction and 32K byte data cache memories, two 16K-byte blocks of SRAM and 64K bytes of ROM with single cycle access at maximum processor or bus speed, together with an external bus interface with controllers for SDRAM and static memories including NAND Flash and CompactFlash. Its extensive peripheral set includes USB Full Speed Host and Device interfaces, a 10/100 Base T Ethernet MAC, Image Sensor Interface, Multimedia Card Interface (MCI), Synchronous Serial Controllers (SSC), USARTs, Master/Slave Serial Peripheral Interfaces (SPI), two three-channel 16-bit Timer Counters (TC), a Two Wire Interface (TWI) and four-channel 10-bit ADC. Three 32-bit Parallel I/O Controllers multiplex the pins to/from these peripherals in order to reduce the device pin count, and peripheral DMA channels maximize the data throughput between these interfaces and the on- and off-chip memories.

The AT91SAM9G20 has a fully featured system controller for efficient system management, including a reset controller, shutdown controller, clock management, advanced interrupt controller (AIC), debug unit (DBGU), periodic interval timer, watchdog timer and real-time timer. It is available in a 217-ball LFBGA RoHS-compliant package.

The AT91SAM9G20 is supported by the AT91SAM9G20 Evaluation Board and extensive third-party application development tools. It supports both Linux and Windows CE.

AT91SAM9G20 特性
AT91SAM9G20 订购型号
Ordering Code Package Package Type Operating Temperature Range
AT91SAM9G20-CU BGA217 Green Industrial (-40° C to 85° C)
AT91SAM9G20B-CU BGA217 Green Industrial (-40° C to 85° C)
AT91SAM9G20B-CFU BGA247 Green Industrial (-40° C to 85° C)
AT91SAM9G20 应用技术支持与电子电路设计开发资源下载
  1. AT91SAM9G20 数据手册DataSheet 下载. PDF(完整版)
  2. AT91SAM9G20 英文数据手册DataSheet 下载. PDF(简洁版)
  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.