, in fact, the two kinds of RJ-45 port is completely the same as the port itself, however, the network circuit structure corresponding to the port is different, so it cannot be connected at will.2. the AUI port is the LAN interface used to connect to the coarse coaxial cable. It is a D-type 15-pin LAN interface, this is one of the most common ports in the ring or bus network. The router can connect to the 10Base-5 network through the coarse coaxial cable tra
content of the LED display can be easily updated in real time in any place with mobile network coverage by means of short messages, effectively solving the trouble of updating the LED display data and the difficulty of monitoring, reduces the workload of management departments. With the development of mobile communication technology and the further promotion of the application scope of LED display screen, this kind of LED display screen based on mobile data has great application value.1. system
There are many ways of communication between single-chip microcomputer and PC. The following program mainly uses the asynchronous serial communication of 51 single-chip microcomputer.I. 51 Serial Communication pins of Single-chip Microcomputer
P3.1 is the txd pin (Transfer Data) of the microcontroller, and p3.2 is the rxd pin (receive data) of the microcontroller ).
The txd pin can be used to output data from the CPU. The rxd pin can read data from the serial data line.
Ii. 51 MCU serial communi
Instruments for the OMAPH2 software development platform running an Linux 2.6 kernel. ThatBuilds on the standard Linux USB host and peripheral side driverFrameworks, making small additions as described here. It also includesDrivers implementing OTG support on OMAP platforms.OMAP H2 Platform
The H2 software development platform between des a Texas InstrumentsOMAP 5912/16 XX Series processor, with an arm 926tej CPU, a DSP, batteryPower Management, and a wealth of other features often used in cell
skin, turns, "cat5" on the skin, 5 categories on the box, 305 meters/box, 100-500 RMB/box (meters per segment, connected with 4 relay devices, up to meters)
Wiring sequence: Normal: White orange white green blue white blue green white Brown1 2 3 4 5 6 7 8Consortium: white green white orange brown white brown orange white blue1 2 3 4 5 6 7 8STP: similar to UTP, external aluminum foil, apple, and IBM network products require STP twisted pair wires for high speed and high price.(2) coaxial cable:
structure of the Bluetooth system. In a Bluetooth system, the network connected to a device is called the pico network (piconet), which is composed of a master node (masterunit) andComposed of multiple slave nodes (slaveunit. The master node is the bluetooth device used to synchronize other nodes in the micro-network. It is the initiator of the connection process and can maintain connections with up to seven slave nodes at the same time. Slave node is microDevices except the master node in the
standards. They are plug-and-play and support full duplex mode.
3. POF-RJ45 Optical Transceiver
POF-RJ45 optical transceiver is an Ethernet optical interface to RJ45 converter. It provides a POF fiber port and a twisted pair port with an RJ45 connection interface. It converts electrical signals from an Ethernet network to optical signals transmitted on a POF plastic optical fiber, and vice versa. The POF-R
The mt6165 is a TD-SCDMA and 2g dual-mode RF transceiver implemented in 40nm CMOS. The intrusion network RF transceiver functions are fully integrated. This document describes the performance objectives of RF. Embed macros throughout your productKey Features-Low cost Dual Mode RF Solutions (GGE and TD-SCDMA). 8 (hspa+)) four-frequency GGE (GSM850/900/DCS/PCS)/three-band TDD (B34/B39/B40) support 16QAM UL/64
cycle from the standard 12 system cycles, and the peak performance will reach 25 MIPS. In addition, the CAN controller and high-speed A/D converter can be integrated in the to simplify the system design. The CAN controller is integrated with the. To run the CAN bus, the can transceiver must be connected to the single-chip microcomputer to perform electrical conversion and convert the logic signal into a balanced Differential Code. Commonly used can
Microprocessor AT91RM9200 with ARM920T as the core. It features a clock speed of up to 180 MHz and advanced power-saving technology. It integrates interfaces such as SDRAM, Flash, infrared, and USB. The system uses USB (Universal Serial Bus) and infrared mode to communicate with the host computer. The infrared method is realized by HSDL-3602 infrared transceiver of Agilent.1.2 Radio Frequency Identification ModuleThe RFID module uses the Swedish TagM
equipment racks is pigtails. Pigtails have a diameter of about 4mm, and both ends are equipped with standard connectors.The interface connecting optical fiber or optical fiber is called optical port, and the interface connecting the optical fiber is called electrical port.Optical Transceiver: generally composed of optical receivers, optical transmitters, and electrical terminals. There are also internal alarm modules (when the device is faulty) and o
is sent to the host computer every 20 ms.
Wireless Data Transmission System
The lower computer transmits a set of Optical Encoder values (speed), battery, angle, and current sensor STATUS (sensor) to the upper computer every 20 ms) in the ideal state, the host computer should receive the cyclical data of the above values, in this case, the upper computer only needs to load the data in order into their respective arrays and draw a picture. However, data may be lost during wireless transmissi
VroInLanThere are many types of LAN interfaces to match different routes, such as the AUI port and SC port. LAN interfaces are mainly used to connect routers and local area networks. Because there are also a variety of LAN types, this determines the LAN interface types of routers.
Different networks have different LAN interface types, common Ethernet interfaces include AUI, BNC and RJ-45 interfaces, as well as FDDI, ATM, optical fiber interface, these networks have the corresponding LAN interfac
. POF-RJ45 Optical Transceiver
POF-RJ45 optical transceiver is an Ethernet optical interface to RJ45 converter. It provides a POF fiber port and a twisted pair port with an RJ45 connection interface. It converts electrical signals from an Ethernet network to optical signals transmitted on a POF plastic optical fiber, and vice versa. The POF-RJ45 optical transceiver
industrial barriers. We can evaluate the reliability of the Wireless System Based on some characteristic parameters.
The RF spectrum used:Physical RF spectrum used for Wireless System Communication
Receiving sensitivity:Minimum signal level received by the transceiver for communication
Output Power:Capable output signal level
RF Agility:Ability to move in RF spectrum to avoid interference
Anti-interference degree:The ability to communicate in a given
interrupt. When a sequence conversion is completed, no interrupt is generated.2.9, ADC DMA trigger (and ADC interrupt a kind of complementary feeling ~)For each sequence conversion, the ADC generates a DMA trigger. When a single conversion is completed, no DMA triggers are generated.There is one DMA trigger for each of the eight channels defined by the first eight possible settings for ADCCON2. SCH. When a new sample is ready to be converted in the channel, the DMA trigger is active. The DMA tr
information, but also for raw milk trading, Android app program cost is lower than the Poss machine special program to promote the use of. In the billing function of the introduction of SMS transceiver hardware devices, complete a transaction after the submission of the statement to the background database and trigger the corresponding action-driven Gsm-smmodem SMS transceiver device to send the transactio
-distance, low-speed, low-cost and low-complexity, and has been widely used in the field of near-range wireless network. It is a low power wireless personal area network protocol based on the IEEE802.15.4 standard, can operate in the free 2.4 GHz public band, the transmission rate is 100 kbps, the actual transmission distance of a single node is based on the transmit power size and application mode, in the case of no-occlusion can be achieved in the amount of up to a maximum of up to m above. Zi
Blog directory:1, the UART and RS232, RS485 relations:2, RS232 and RS485 of the difference and pin introduction3. Reference documentsThe text is as followsI. The relationship between UART and RS232 and RS485:Communication problems, and traffic is the same. Serial communication, we can use bus to analogy.Bus operation can be easily divided into two parts: 1, Station 2, the road where the station determines what (people), how to send (shift) and so on. When the car runs on the road, it is necessar
Network Interconnection device lecture
Network Interconnection device Overview
When connecting a computer to a computer or workstation to a server, in addition to using the connection media, you also need some intermediary devices. What are the main intermediary devices? What role does it play? This is a concern in network design and implementation.
We divide commonly used connection devices into the following types:
I. network transmission media interconnection Device
When a network line is con
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