DC/DC 升壓IC：The FP6291 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.25 Ω
power MOSFET make this regulator highly power efficient. The internal compensation network also
minimizes as much as 6 external component counts. The non-inverting input of error amplifier connects
to a 0.6V precision reference voltage and internal soft-start function can reduce the inrush current.
The FP6291 is available in the SOT23-6L package and provides space-saving PCB for the application fields.
Industrial remote monitoring systems and keep-alivecircuits spend most of their time in standby mode. Manyof these systems also depend on battery power, so powersupply effi ciency in standby state is very important tomaximize battery life. The LT®8410/-1 high effi ciencyboost converter is ideal for these systems, requiringonly 8.5μA of quiescent current in standby mode. Thedevice integrates high value (12.4M/0.4M) output feedbackresistors, signifi cantly reducing input current whenthe output is in regulation with no load. Other featuresinclude an integrated 40V switch and Schottky diode,output disconnect with current limit, built in soft-start,overvoltage protection and a wide input range, all in atiny 8-pin 2mm × 2mm DFN package.
This white paper raises some fundamental issues the design engineer should address before deciding upon a communication approach for a wireless network. As no universal wireless network solution exists, it should be custom tailored to suit the application demands. Defining your application communication characteristics is the key to ensure optimal communication reliability and resistance to interfering noise sources.
介紹了CAN總線和P87C591單片機(jī)的特點(diǎn)，給出了基于P87C591單片機(jī)的信號(hào)采集節(jié)點(diǎn)的軟、硬件設(shè)計(jì)，指出了硬件電路設(shè)計(jì)中應(yīng)注意的問(wèn)題，在軟件設(shè)計(jì)中重點(diǎn)介紹了節(jié)點(diǎn)初始化、報(bào)文發(fā)送和報(bào)文接收等子程序。
Abstract:
The features of CAN Bus and the microcontroller P87C591 are introduced, and the design of hardware circuit and soft configuration of the signals collection node based on P87C591 are presented. The problems in designing hardware circuit are discussed.Initialization subprogram, transmiting subprogram and receiving subprogram are emphasized in soft configuration.
SAE J1939協(xié)議是由汽車工程協(xié)會(huì)(SAE)定義的，SAE J1939協(xié)議在商用車輛、艦船、軌道機(jī)車、農(nóng)業(yè)機(jī)械和大型發(fā)動(dòng)機(jī)中是應(yīng)用最廣泛的應(yīng)用層協(xié)議，基于傳輸可靠性能優(yōu)越的CAN-bus總線，可達(dá)到250Kbps的通訊速率。在協(xié)議中，不僅指定了傳輸類型、報(bào)文結(jié)構(gòu)及其分段、流量檢查等，而且報(bào)文內(nèi)容本身也做了精確的定義，SAE J1939協(xié)議由美國(guó)SAE( Society of Automotive Engineer)組織維護(hù)和推廣
Abstract: There are many things to consider when designing a power supply for a field-programmablegate array (FPGA). These include (but are not limited to) the high number of voltage rails, and thediffering requirements for both sequencing/tracking and the voltage ripple limits. This application noteexplains these and other power-supply considerations that an engineer must think through whendesigning a power supply for an FPGA.
It would not be an exaggeration to say that semiconductor devices have transformed humanlife. From computers to communications to internet and video games these devices and the technologies they have enabled have expanded human experience in a way that is unique in history. Semiconductor devices have exploited materials, physics and imaginative applications to spawn new lifestyles. Of course for the device engineer, in spite of the advances, the challenges of reaching higher frequency, lower power consumption, higher power generation etc.
通過(guò)以太網(wǎng)遠(yuǎn)程配置Nios II 處理器 應(yīng)用筆記
Firmware in embedded hardware systems is frequently updated over the Ethernet. For
embedded systems that comprise a discrete microprocessor and the devices it controls, the
firmware is the software image run by the microprocessor. When the embedded system
includes an FPGA, firmware updates include updates of the hardware image on the FPGA. If
the FPGA includes a Nios® II soft processor, you can upgrade both the Nios II processor—as
part of the FPGA image—and the software that the Nios II processor runs, in a single remote
configuration session.
