The PCA9549 provides eight bits of high speed TTL-compatible bus switching controlledby the I2C-bus. The low ON-state resistance of the switch allows connections to be madewith minimal propagation delay. Any individual A to B channel or combination of channelscan be selected via the I2C-bus, determined by the contents of the programmable Controlregister. When the I2C-bus bit is HIGH (logic 1), the switch is on and data can flow fromPort A to Port B, or vice versa. When the I2C-bus bit is LOW (logic 0), the switch is open,creating a high-impedance state between the two ports, which stops the data flow.An active LOW reset input (RESET) allows the PCA9549 to recover from a situationwhere the I2C-bus is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-busstate machine and causes all the bits to be open, as does the internal power-on resetfunction.
上傳時間： 2014-11-22
上傳用戶：xcy122677
CAN與RS232轉(zhuǎn)換節(jié)點的設(shè)計與實現(xiàn) 介紹將CAN總線接口與RS232總線接口相互轉(zhuǎn)換的設(shè)計方法和2種總線電平轉(zhuǎn)換關(guān)系，實現(xiàn)CAN總線與各模塊的接口設(shè)計，制定了相應(yīng)的軟硬件設(shè)計方案，并給出軟件設(shè)計流程圖以及部分硬件設(shè)計原理圖。為CAN總線與RS232總線互聯(lián)提供了一種方法，對CAN總線與RS232總線接口設(shè)備的互聯(lián)和廣泛應(yīng)用的實現(xiàn)具有重要意義。關(guān)鍵詞：CAN總線；RS-232總線；串行通信Design and Realization of CAN and RS232 Transformation NodeZHOU Wei, CHENG Xiao-hong(Information Institute, Wuhan University of Technology, Wuhan 430070)【Abstract】This paper introduces one design method of the CAN bus interface and the RS232 bus interface interconversion, emphasizes two kindof bus level transformation relations, realizes the CAN bus and various modules connection design, formulates the design proposal of correspondingsoftware and hardware, and gives the flow chart of software design as well as the partial schematic diagram of hardware design. It providesonemethod for the CAN bus and the RS232 bus interconnection, has the vital significance to widespread application realization of the CAN busand theRS232 bus interface equipment interconnection.【Key words】CAN bus; RS-232 bus; serial communication
上傳時間： 2013-11-04
上傳用戶：leesuper
賽靈思設(shè)計流程
上傳時間： 2013-11-01
上傳用戶：腳趾頭
EMC_電磁兼容性設(shè)計英文版_RF currents flow easily through galvanic isolation : transformers 500pf , relays 10 pf ,opto couplers 1 pf .
上傳時間： 2013-10-30
上傳用戶：pzw421125
This example provides a description of how to use the USART with hardware flowcontrol and communicate with the Hyperterminal.First, the USART2 sends the TxBuffer to the hyperterminal and still waiting fora string from the hyperterminal that you must enter which must end by '\r'character (keypad ENTER button). Each byte received is retransmitted to theHyperterminal. The string that you have entered is stored in the RxBuffer array. The receivebuffer have a RxBufferSize bytes as maximum. The USART2 is configured as follow: - BaudRate = 115200 baud - Word Length = 8 Bits - One Stop Bit - No parity - Hardware flow control enabled (RTS and CTS signals) - Receive and transmit enabled - USART Clock disabled - USART CPOL: Clock is active low - USART CPHA: Data is captured on the second edge - USART LastBit: The clock pulse of the last data bit is not output to the SCLK pin
上傳時間： 2013-10-31
上傳用戶：yy_cn
賽靈思設(shè)計流程
上傳時間： 2013-11-10
上傳用戶：qwe1234
Current design flow challenges
標簽： Cosimulation_with_layout ADS 原理圖 版圖
上傳時間： 2013-11-06
上傳用戶：jiangxiansheng
OFELI is an object oriented library of C++ classes for development of finite element codes. Its main features are : * Various storage schemes of matrices (dense, sparse, skyline). * Direct methods of solution of linear systems of equations as well as various combinations of iterative solvers and preconditioners. * Shape functions of most "popular" finite elements * Element arrays of most popular problems (Heat Transfer, Fluid Flow, Solid Mechanics, Electromagnetics, ...).
標簽： development oriented classes element
上傳時間： 2015-03-03
上傳用戶：kbnswdifs
the minimun square elimination in curve fitting,introduction how to orgnize the data and has the program flow chat
標簽： the introduction elimination minimun
上傳時間： 2015-04-25
上傳用戶：凌云御清風(fēng)
物流分析工具包。Facility location: Continuous minisum facility location, alternate location-allocation (ALA) procedure, discrete uncapacitated facility location Vehicle routing: VRP, VRP with time windows, traveling salesman problem (TSP) Networks: Shortest path, min cost network flow, minimum spanning tree problems Geocoding: U.S. city or ZIP code to longitude and latitude, longitude and latitude to nearest city, Mercator projection plotting Layout: Steepest descent pairwise interchange (SDPI) heuristic for QAP Material handling: Equipment selection General purpose: Linear programming using the revised simplex method, mixed-integer linear programming (MILP) branch and bound procedure Data: U.S. cities with populations of at least 10,000, U.S. highway network (Oak Ridge National Highway Network), U.S. 3- and 5-digit ZIP codes
標簽： location location-allocation Continuous alternate
上傳時間： 2015-05-17
上傳用戶：kikye
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