共查询到19条相似文献,搜索用时 143 毫秒
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TMS320C54XX系列DSP人机接口模块设计与实现 总被引:2,自引:2,他引:0
介绍了TMS320C54XX系列DSP人机接口模块的设计与实现方法.通过LCM1602与TMS320C54XX的I/O口软硬件接口设计,实现了显示功能;通过锁存器74HC573与TMS320C54XX的I/O口软硬件接口设计,实现了键盘功能.实际应用证明,该设计方法很好地实现了DSP对LCD点阵模块的驱动与显示,节省了I/O端口资源. 相似文献
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基于FPGA的高速DSP与液晶模块接口的实现 总被引:1,自引:2,他引:1
介绍了一种基于TMS320VC5402 DSP&FPGA在液晶模块中的设计。针对高速DSP与LCD读写数据过程中时序的不匹配,提出了一种基于FPGA的解决方法。给出了快速器件DSP和慢速器件液晶模块的接口方法,并做出了逻辑时序分析;介绍了TMS320VC5402 DSP与液晶模块通过FPGA接口的硬件和软件实例,并给出了部分程序代码。利用FPGA进行I/O口的扩展,克服了DSP I/O口功能弱的缺点,提高了DSP的控制能力,节省了DSP的I/O资源。实验表明,该系统具有可靠性高的优点。 相似文献
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Jacob Reese 《电子产品世界》2001,(13):42-43
正射极耦合逻辑(PECL)是成帧器高速I/O的标准逻辑电平,这种输出方式耗电较大,为降低功耗需采用一些间接的解决方案.Maxim推出的MAX3881、MAX3891复用/解复用器的并行通道采用单端PECL I/O,可有效解决上述问题,但在单端与差分接口之间连接时需注意未使用的I/O端必须适当连接.
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I/O扩展芯片GM8166的原理与应用 总被引:2,自引:0,他引:2
本文介绍了成都国腾微电子有限公司推出的I/O扩展芯片GM8166的功能和特点,通过实例说明该芯片的使用方法.该芯片提供32位双向I/O口,与MCU接口简单,具有成本低、省PCB面积、速度快等优点. 相似文献
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带大量I/O口扩展的串行芯片GM8164及其应用 总被引:3,自引:0,他引:3
GM8164是成都国腾电子设计中心生产的具有大量I/O口扩展功能的串行接口芯片 ,该芯片具有扩展I/O口数量多 ,与单片机接口简单的特点 ,文中介绍了该芯片的性能、特点和工作方式 ,给出了GM8164与AT89C2051单片机的硬件接口电路及接口程序。 相似文献
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I/O接口是笔记本电脑EMI超标的主要来源.通过对笔记本电脑周边接口在印制电路板上的布线和布局进行合理规划,以限制噪声信号随意进出I/O接口;同时对接口连接器在I/O口区域做适当接地可优化笔记本电脑的电磁兼容性. 相似文献
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Performance considerations in designing network interfaces 总被引:5,自引:0,他引:5
Design issues that affect the performance of network input/output (I/O) are examined by analyzing the design and performance of a workstation's network interface to the 100-Mb/s FDDI token ring. Several design alternatives for partitioning functions between the network interface and the host software are evaluated. A simple model is proposed for looking at the performance of network I/O, and an effective analysis approach for predicting user-perceived throughput is demonstrated. The analysis reveals that, particularly for network interfaces that reside on an I/O bus, providing a DMA engine for data movement provides significant improvements in throughput. However, the designs for the receive and transmit sides are not necessarily symmetrical, and it is shown that host architecture considerations influence the design of each direction differently. The analysis is used to show the potential benefits of having all protocol functions on the network interface and also to point out the potential processing power needed on that network interface 相似文献
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Kawano R. Yamanaka N. Oki E. Yasukawa S. Okazaki K. Ohki A. Usui M. Sato N. Katsura K. Ando Y. Kagawa T. Hikita M. 《Advanced Packaging, IEEE Transactions on》2001,24(1):91-98
For an ATM switch system, we have developed a 100-Gb/s input/output (I/O) throughput optical I/O interface ATM switch multichip module (MCM) that has 320-ch optical I/O ports. This MCM is fabricated using ceramic (MCM-C) technology and very-small highly-parallel O/E and E/O optical converters. It uses 0.25-μm complementary metal oxide semiconductors (CMOS) ATM switch large scale integrations (LSIs) and has a total I/O throughput of up to 160 Gb/s. A prototype module with total I/O throughput of 100 Gb/s has been partially assembled using eight optical I/O interface blocks, each composed of a 40-ch O/E converter and a 40-ch E/O converter; the data rate per channel is from dc to 700 Mb/s. Using this module we developed an optical I/O interface ATM switch system and confirmed the operation of the optical interface 相似文献
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Xuezhe Zheng Lexau J.K. Bergey J. Cunningham J.E. Ron Ho Drost R. Krishnamoorthy A.V. 《Photonics Technology Letters, IEEE》2007,19(7):453-455
Combining the strengths of both proximity communication and optical communication, a new hybrid input-output (I/O) platform delivers on-chip bandwidth off-chip and over distance. We demonstrate, for the first time, a four-channel hybrid I/O interface by integrating proximity communication and vertical-cavity surface-emitting-laser-based parallel optical interconnects on the same commercial 90-nm complementary metal-oxide-semiconductor platform. The optical I/O can operate at 5 Gb/s per channel, and the complete hybrid I/O interface achieved 2.5 Gb/s per channel. We characterize the I/O link performance for various data rates and chip separations, and show 10-mum chip separation tolerance for proximity communication 相似文献
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CH361是一个简便易用的PCI总线通用接口芯片。可用于制作低成本的PCI总线的计算机板卡,同时也可以利用它把原来的ISA总线卡移植到PCI总线上。文中在介绍了CH361的特点、功能和工作模式的基础上,重点介绍了CH361与PCI总线、存储器、扩展ROM和I/O端口的接口电路。 相似文献