参数资料
型号: AT91SAM9G20B-CU
厂商: Atmel
文件页数: 15/42页
文件大小: 0K
描述: IC ARM9 MPU 217-LFBGA
产品培训模块: SAM9 MPU Boot Solutions & Application Deployment
MCU Product Line Introduction
标准包装: 126
系列: SAM9G
核心处理器: ARM9
芯体尺寸: 16/32-位
速度: 400MHz
连通性: EBI/EMI,以太网,I²C,IrDA,ISI,MMC,SPI,SSC,UART/USART,USB
外围设备: DMA,POR,PWM,WDT
输入/输出数: 96
程序存储器容量: 64KB(64K x 8)
程序存储器类型: ROM
RAM 容量: 96K x 8
电压 - 电源 (Vcc/Vdd): 0.9 V ~ 1.1 V
数据转换器: A/D 4x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 217-LFBGA
包装: 托盘
配用: AT91SAM9G20-EK-ND - KIT EVAL FOR AT91SAM9G20 MCU
AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9
其它名称: AT91SAM9G20-CU
AT91SAM9G20-CU-ND
22
6384DS–ATARM–13-Jan-10
AT91SAM9G20 Summary
8.2
External Memories
The external memories are accessed through the External Bus Interface. Each Chip Select line
has a 256-Mbyte memory area assigned.
Refer to the memory map in Figure 8-1 on page 19.
8.2.1
External Bus Interface
Integrates three External Memory Controllers
– Static Memory Controller
– SDRAM Controller
– ECC Controller
Additional logic for NAND Flash
Full 32-bit External Data Bus
Up to 26-bit Address Bus (up to 64MBytes linear)
Up to 8 chip selects, Configurable Assignment:
– Static Memory Controller on NCS0
– SDRAM Controller or Static Memory Controller on NCS1
– Static Memory Controller on NCS2
– Static Memory Controller on NCS3, Optional NAND Flash support
– Static Memory Controller on NCS4 - NCS5, Optional CompactFlash support
– Static Memory Controller on NCS6-NCS7
8.2.2
Static Memory Controller
8-, 16- or 32-bit Data Bus
Multiple Access Modes supported
– Byte Write or Byte Select Lines
– Asynchronous read in Page Mode supported (4- up to 32-byte page size)
Multiple device adaptability
– Compliant with LCD Module
– Control signals programmable setup, pulse and hold time for each Memory Bank
Multiple Wait State Management
– Programmable Wait State Generation
– External Wait Request
– Programmable Data Float Time
Slow Clock mode supported
8.2.3
SDRAM Controller
Supported devices
– Standard and Low-power SDRAM (Mobile SDRAM)
Numerous configurations supported
– 2K, 4K, 8K Row Address Memory Parts
– SDRAM with two or four Internal Banks
– SDRAM with 16- or 32-bit Datapath
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