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RSS订阅转载 电力载波（本人做的项目）
<br />低压载波集中抄表现状及国家标准制定工作介绍 <br /> <br />一、 低压载波集中抄表现状<br />低压（AC380V）载波通信在国内的应用，主要在两个方面：能量计量集中抄表系统与电力线上网。 <br /> <br />自从我国国民经济从计划经济向市场经济转轨以来，我国的能量计量营业管理体制，一直在寻求模式的转换。但长期受制于计量数据采集技术装备的落后局面，久久得不到解决！在上个世纪九十年代，预付费系统确实红了好一阵子，光电能表预付费系统，北京、天津两地，就各有200－30
2010-07-18 01:43:00
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三星2440PDF S3S2440
很有用的文档This user’s manual describes SAMSUNG's S3C2440A 16/32-bit RISC microprocessor. SAMSUNG’s S3C2440A is
designed to provide hand-held devices and general applications with low-power, and high-performance microcontroller
solution in small die size. To reduce total system cost, the S3C2440A includes the following components.
The S3C2440A is developed with ARM920T core, 0.13um CMOS standard cells and a memory complier. Its lowpower,
simple, elegant and fully static design is particularly suitable for cost- and power-sensitive applications. It
adopts a new bus architecture known as Advanced Micro controller Bus Architecture (AMBA).
The S3C2440A offers outstanding features with its CPU core, a 16/32-bit ARM920T RISC processor designed by
Advanced RISC Machines, Ltd. The ARM920T implements MMU, AMBA BUS, and Harvard cache architecture with
separate 16KB instruction and 16KB data caches, each with an 8-word line length.
2010-06-20
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