required
共 193 篇文章
required 相关的电子技术资料，包括技术文档、应用笔记、电路设计、代码示例等，共 193 篇文章，持续更新中。
This code outputs various NMEA strings to a com port. The code was originally used to test naviati
This code outputs various NMEA strings to a com port. The code was
originally used to test naviation programmes.
First select the required com port and the required NMEA message string.
There is
XAPP708 -133MHz PCI-X到128MB DDR小型DIMM存储器桥
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The Virtex-4 features, such as the programmable IDELAY and built-in FIFO support, simplifythe bridging of a high-speed, PCI-X core to large amounts of DDR-SDRAM memory. Onechall
DTMF Decoding with a PIC16xxx
<P>This application note describes how to decode standard DTMF tones using the minimum number of external discrete components and a PIC. The two examples use a PIC which has an 8 bit timer and either
按键开关控制器简化系统设计
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Handheld designers often grapple with ways to de-bounceand control the on/off pushbutton of portable devices.Traditional de-bounce designs use discrete logic, fl ipflops, resist
使用5V电源的高分辨率视频解决方案
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Video cable driver amplifi er output stages traditionallyrequire a supply voltage of at least 6V in order to providethe required output swing. This requirement is usuallymet wit
CAT25128－128Kb的SPI串行CMOS EEPRO
The CAT25128 is a 128−Kb Serial CMOS EEPROM device internally organized as 16Kx8 bits. This features a 64−byte page write buffer and supports the Serial Peripheral Interface (SPI) protocol
应用笔记-校准激光驱动器POT和DAC
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Abstract: A laser module designer can use a fixed resistor, mechanical pot, digital pot, or a digital-to-analogconverter (DAC) to control the laser driver's modulation and bias currents. Th
PCA9555 16bit I2C-bus and SMBu
<P>The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel<BR>Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to<BR>enhance the NXP Semicon
X-tal oscillators on 8-bit mic
<P><Almost since the introduction of microcontrollers as electronic components there always has been an oscillatorcircuit on the device to make it work. From application point of view only some ext
ADC转换器技术用语 (A/D Converter Defi
ANALOG INPUT BANDWIDTH is a measure of the frequency<BR>at which the reconstructed output fundamental drops<BR>3 dB below its low frequency value for a full scale input. The<BR>test is performed with
Atmel AVR 单片机上网方案
<P>Atmel AVR 单片机上网方案</P>
<P>The AVR Embedded Internet Toolkit is the fastest way to connect any<BR>embedded design to the Internet. It includes an ATmega AVR microcontroller,<BR>dedicated hardware, an
PLD对FPGA数据加密
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SRAM-based FPGAs are non-volatile devices. Upon powerup, They are required to be programmed from an external source. This procedure allows anyone to easily monitor the bit-stream, and clone the d
两相同步降压型控制器具有轻负载逐级递减模式
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Today’s computer, datacom, and telecom systems demandpower supplies that are effi cient, respond quicklyto load transients and accurately regulate the voltageat the load.
简单、高效USB电源管理IC解决方案
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Linear Technology offers a variety of devices that simplifyconverting power from a USB cable, but the LTC®3455represents the highest level of functional integration yet. The
带有SerDes接口的PLB千兆位级以太网MAC
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This application note describes a reference system which illustrates how to build an embeddedPowerPC® system using the Xilinx 1-Gigabit Ethernet Media Access Controller processor core.This
自举偏置高输入电压降压型控制器
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High voltage buck DC/DC controllers such as the LTC3890(dual output) and LTC3891 (single output) are popular inautomotive applications due to their extremely wide 4V to60V input
电源供应器与数字电位器校准应用笔记
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Abstract: A resistive feedback network is often used to set the output voltage of a power supply. A mechanical potentiometer (pot)conveniently solves the problem of adjusting a power supply. Fo
PICKIT™ 2 PROGRAMMER-TO-
<P><STRONG>PICKIT™ 2 PROGRAMMER-TO-GO USER GUIDE</STRONG></P>
<P>The PICkit 2 Programmer-To-Go functionality allows a PIC MCU memory image to be downloaded into the PICkit 2 unit for later progr
Reading and Writing iButtons v
Abstract: This application note explains the hardware of different types of 1-Wire® interfaces and software examples adapted to this hardware with a focus on serial ports. Depending on the types o
MSP430 USB JTAG自制资料
<P>The MSP-FET430U14 is a powerful flash emulation tool to quickly begin application development on the MSP430 MCU. It includes USB debugging interface used to program and debug the MSP430 in-system t