I^2C是一种双向串行数据总线，是由串行数据线SDA（Serial Date line：SDA）和串行时钟线SCL（Serial Clock line：SCL）组成。SDA、SCA均为双向I／O（既可作输入，也可作输出）线，采用“线与”结构，在硬件电路上，经上拉电阻接到VDD...I^2C是一种双向串行数据总线，是由串行数据线SDA（Serial Date line：SDA）和串行时钟线SCL（Serial Clock line：SCL）组成。SDA、SCA均为双向I／O（既可作输入，也可作输出）线，采用“线与”结构，在硬件电路上，经上拉电阻接到VDD（电源正端）。利用I^2C总线进行通信的接口器件，已有多种，如串行EEPROM，A／D转换器，各种单片机集成电路等。展开更多
IEEE 1394b is a high-speed data bus that is widely used in local area networks and consumer electronics. To best utilize this data bus, we need to fully understand its per- formance. To evaluate its performance for bo...IEEE 1394b is a high-speed data bus that is widely used in local area networks and consumer electronics. To best utilize this data bus, we need to fully understand its per- formance. To evaluate its performance for both isochronous and asynchronous data transfers, we model the IEEE 1394b bus using Deterministic and Stochastic Pelri Nets （DSPNs）, and conduct simulations using TimeNET 4.0. Using the DSPNs model, we simulate both the average waiting times of isochronous and asynchronous packets. From the simulation results, we determine the factors that influence performance, such as throughput, size of packets, arrival rate of packets, number of isochronous channels, and bus configuration.展开更多
文摘I^2C是一种双向串行数据总线，是由串行数据线SDA（Serial Date line：SDA）和串行时钟线SCL（Serial Clock line：SCL）组成。SDA、SCA均为双向I／O（既可作输入，也可作输出）线，采用“线与”结构，在硬件电路上，经上拉电阻接到VDD（电源正端）。利用I^2C总线进行通信的接口器件，已有多种，如串行EEPROM，A／D转换器，各种单片机集成电路等。
基金supported by the Aeronautics Science Foundation of China under Grant No. 2008ZC51
文摘IEEE 1394b is a high-speed data bus that is widely used in local area networks and consumer electronics. To best utilize this data bus, we need to fully understand its per- formance. To evaluate its performance for both isochronous and asynchronous data transfers, we model the IEEE 1394b bus using Deterministic and Stochastic Pelri Nets （DSPNs）, and conduct simulations using TimeNET 4.0. Using the DSPNs model, we simulate both the average waiting times of isochronous and asynchronous packets. From the simulation results, we determine the factors that influence performance, such as throughput, size of packets, arrival rate of packets, number of isochronous channels, and bus configuration.
