sam9g46基于ARM的嵌入式微处理器ATMEL智能数据表

　　The Atmel ® | SMART ARM926EJ-S™-based SAM9G46 embedded microprocessor unit （eMPU） features the frequently requested combination of user interface functionality and high data rate connectivity， including LCD controller， resistive touchscreen， camera interface， audio， Ethernet 10/100 and high speed USB and SDIO. With the processor running at 400 MHz and multiple 100+ Mbps data rate peripherals， the SAM9G46 provides adequate performance and bandwidth to the network or local storage media. The SAM9G46 eMPU supports DDR2 and NAND Flash memory interfaces for program and data storage. An internal 133 MHz multi-layer bus architecture associated with 39 DMA channels， a dual external bus interface and distributed memory including a 64-Kbyte SRAM that can be configured as a tightly coupled memory （TCM） sustains the high bandwidth required by the processor and the high speed peripherals. On-chip hardware accelerators with DMA support enable high-speed data encryption and authentication of the transferred data or application. Supported standards are up to 256-bit AES， FIPS PUB 46-3 compliant TDES and FIPS Publication 180-2 compliant SHA1 and SHA256. A True Random Number Generator is embedded for key generation and exchange protocols. The I/Os support 1.8V or 3.3V operation， which are independently configurable for the memory interface and peripheral I/Os. This feature completely eliminates the need for any external level shifters. In addition it supports 0.8 mm ball pitch package for low cost PCB manufacturing. The SAM9G46 power management controller features efficient clock gating and a battery backup section minimizing power consumption in active and standby modes.