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通信設(shè)計(jì)應(yīng)用
電子發(fā)燒友網(wǎng)本頻道為通信技術(shù)專欄，提供詳細(xì)的通信設(shè)計(jì)最新技術(shù)與應(yīng)用；是您學(xué)習(xí)通信技術(shù)知識的好平臺。
Driving LEDs with Open Drain P
Abstract: This application note discusses techniques for driving LEDs with the MAX6964, MAX6965, MAX7313, MAX7314, MAX7315 and MAX7316 I/O expanders (GPIOs). These techniques can be applied to other I/O expanders with open-drain outputs, a...
2009-04-23 標(biāo)簽：led 1199
驅(qū)動LED與推挽輸出端口擴(kuò)展器-Driving LEDs w
Abstract: This application note discusses techniques for driving LEDs, using the MAX7300, MAX7301, MAX7310, MAX7311, and MAX7312 I2C and SPI I/O expanders (GPIOs). These techniques can be applied to other I/O expanders with push-pull outpu...
Dual Voltage Tracking Circuit
Abstract: This note describes a dual tracking controller for a single I/O voltage and two core voltages. It describes how to apply the circuit to one or many core voltages. Principles covered include: the need for tracking, practical ...
2009-04-23 標(biāo)簽： 989
The Effects of Adjusting the D
Abstract: The DS1086L is a 3.3V spread spectrum oscillator that is used in applications concerned with complying with electromagnetic compatibility (EMC) standards such as FCC part 15 or CISPR 22.Ideally with this architecture the peak pow...
2009-04-23 標(biāo)簽：emc 562
超高速閃存微控制器軟件的SPI-Ultra-High-Spe
Abstract: This application note introduces a software (bit bang) SPI™ library for use with Ultra High-Speed Flash Microcontrollers, such as the DS89C430 and DS89C450. The application interface to the library is explained along with a...
2009-04-23 標(biāo)簽：微控制器 789
利用MAX7651實(shí)現(xiàn)ADC轉(zhuǎn)換
摘要：本文提供了利用MAX7651評估板實(shí)現(xiàn)模/數(shù)轉(zhuǎn)換的源代碼和函數(shù)。它是MAX7651評估板提供的3個(gè)應(yīng)用例程之一，能夠進(jìn)行寫、編譯和下載等簡單的編程功能。 另請參考：...
為MAX7651評估板配置Keil µVisio
摘要：本文討論了為MAX7651評估板建立項(xiàng)目和配置Keil µVision® IDE的操作流程，并給出了一個(gè)第三方的應(yīng)用實(shí)例：程序編寫、編譯以及下載到MAX7651評估板的步驟。 ...
2009-04-23 標(biāo)簽：MAX7651 1151
利用MAX7651評估板的串行下載器將程序裝載到閃存內(nèi)
摘要：這是第三方開發(fā)的應(yīng)用例程的第三部分，補(bǔ)充MAX7651EVKIT用戶指南的內(nèi)容。介紹了通過串行下載器和超級終端(HyperTerminal)將HEX代碼裝載到MAX7651EVKIT目標(biāo)板的具體步驟。 ...
2009-04-23 標(biāo)簽：MAX7651 1035
驅(qū)動高性能ASIC和微處理器
摘要：今天的高性能ASIC和微處理器可能會消耗高達(dá)150W的功率。對于1V至1.5V的電源電壓，這些器件所需的電流很容易超出100A。采用多相DC-DC轉(zhuǎn)換器為這些器件提供電力是更加可行的方...
Keil C編譯器的使用與DS89C430/450
Abstract: This application note describes how to use the Keil uVision suite of tools to build a C application for the Ultra-High-Speed Flash family of microcontrollers, which includes the DS89C430 and the DS89C450. The process of loading t...
2009-04-23 標(biāo)簽：編譯器 1835
Using the Keil uVision Debugge
Abstract: This application note describes how to use the Keil µVision2 suite of tools to debug an application for the Ultra-High-Speed Flash family of microcontrollers, which includes the DS89C430 and DS89C450. This process involves ...
2009-04-23 標(biāo)簽：DS89C4x0 1340
即時(shí)效能與閃存微控制器-Instant Performanc
Abstract: The ultra-high-speed flash microcontrollers (UHSFM) are 5V, 1-clock 8051s with integrated flash and SRAM. These UHSFMs drop into existing 8051 applications and deliver an instant boost in speed. This application note discusses th...
2009-04-23 標(biāo)簽：微控制器 604
Efficient Bit-Banged SPI Port
Abstract: A fast SPI port can be bit-banged through GPIO pins and serve as a lower cost alternative to 8051-compatible microcontrollers with SPI ports. The code shown in this application note takes advantage of 8051-specific features to cr...
2009-04-23 標(biāo)簽：microcontr 1474
硅振蕩器取代晶體和陶瓷諧振器
摘要：硅振蕩器能夠替代大多數(shù)微控制器電路中的晶體和陶瓷諧振器。除了其抗振動、抗沖擊及抗EMI等優(yōu)點(diǎn)外，硅定時(shí)器件比晶體和陶瓷諧振器更小且更容易使用。該應(yīng)用筆記詳細(xì)...
2009-04-23 標(biāo)簽：諧振器 1047
使用DS89C450作為靜態(tài)LCD顯示屏控制器
摘要：很多公司的微控制器集成了LCD顯示屏控制器，它采用硬件實(shí)現(xiàn)。有的微控制器，例如DS89C450，不提供這一功能，但是可以通過軟件實(shí)現(xiàn)一個(gè)簡單的顯示控制器。本應(yīng)用筆記闡述...
2009-04-23 標(biāo)簽：lcd 1120
DS8007和智能卡接口基礎(chǔ)
摘要：DS8007是一款低成本的多協(xié)議雙智能卡接口，滿足所有ISO 7816、EMV™和GSM11-11的要求。這個(gè)混合信號外設(shè)可以管理微控制器和兩個(gè)...
2009-04-23 標(biāo)簽：接口 658
從高速微控制器系列向超高速閃存微控制器的升級
摘要：多種原因會促使我們把以前使用高速微控制器(DS80C310/DS80C320/DS80C323/DS8xC520)的8051設(shè)計(jì)升級到新的超高速閃存微控制器(DS89C430/DS89C450)。促使產(chǎn)品升級的原因是：更高的性能、增...
2009-04-23 標(biāo)簽：微控制器 584
使用DS87C530/DS5250實(shí)時(shí)時(shí)鐘-Using th
Abstract: The Dallas Semiconductor DS87C530 high-speed microcontroller with real-time clock (RTC) is ideal for applications such as data logging. This application note examines temperature-measuring techniques interfacing to the DS1620 dig...
2009-04-23 標(biāo)簽：實(shí)時(shí)時(shí)鐘 1316
MAXQ2000微控制器軟件I2C驅(qū)動
摘要：I²C (內(nèi)置于集成電路)是一種2線接口，實(shí)現(xiàn)集成電路之間的雙向通信。本應(yīng)用筆記介紹MAXQ2000微控制器的軟件I²C驅(qū)動器，它采用微控制器的任意GPIO引腳，支持100kHz或400kHz...
2009-04-23 標(biāo)簽：微控制器 819
基于MAXQ微控制器構(gòu)建增強(qiáng)型智能4-20mA變送器
摘要：4-20mA電流環(huán)路是工業(yè)過程監(jiān)控應(yīng)用中發(fā)送傳感器信息時(shí)常用的技術(shù)。(傳感器測量溫度、壓力、速度和液體流量等物理參數(shù))。電流環(huán)路信號對噪聲很不敏感，并且可采用遠(yuǎn)端電...
2009-04-23 標(biāo)簽：微控制器 639
利用DS8007評估套件進(jìn)行設(shè)計(jì)
摘要：本文闡述使用DS8007雙智能卡接口評估(EV)套件的步驟，解釋了怎樣安裝和配置軟件、配置硬件，建立并裝載板上DS5002FP微控制器執(zhí)行的應(yīng)用軟件。提供了一個(gè)簡單的"Hello World"實(shí)...
2009-04-23 標(biāo)簽：DS8007 1160
自動重試控制器套裝在電信中應(yīng)用
Abstract: In Telecom systems such as Radio Link and Point to Point, the point-to-multipoint controller shuts the system off in the event of a fault. When the fault is brief (for instance, a momentary short circuit due to measurement and ca...
2009-04-23 標(biāo)簽：控制器 396
使用MAXQ3210作為微處理器監(jiān)控電路
摘要：MAXQ3210微控制器能夠完成各種微處理器監(jiān)控功能，支持包括上電復(fù)位、電源排序、看門狗超時(shí)和輸入開關(guān)去抖等功能。根據(jù)應(yīng)用，MAXQ3210還可以直接為微處理器供電。本應(yīng)用筆...
2009-04-23 標(biāo)簽：MAXQ3210 1029
DS28DG02用戶指南
要：DS28DG02是帶有PIO、實(shí)時(shí)時(shí)鐘(RTC)、復(fù)位、電池監(jiān)控器和看門狗的2kb SPI™ EEPROM，它組合了便攜式設(shè)備和嵌入式應(yīng)用中需要的多種功能。本應(yīng)用筆記對產(chǎn)品數(shù)據(jù)資料進(jìn)行補(bǔ)充說明...
2009-04-23 標(biāo)簽：DS28DG02 960
簡單的演示如何使用一個(gè)DS1232和MicroMonitor
Abstract: Discusses how the DS1232 can be used to MicroMonitor an 8051-based system. This supervisor circuit provides power-on-reset (POR), manual reset (push-button) input, a watchdog timer (strobe timer), and an early power-fail comparat...
使用DS1814 MicroMonitor來控制微處理器重置
Abstract: The following application note shows simple circuits using the DS1814 MicroMonitor. Circuits include interfacing with an 8051 microprocessor, interfacing with a PIC microcontroller, and using an LED to indicate reset. ...
2009-04-23 標(biāo)簽：MicroMonit 708
Microprocessor Supervisors Off
Abstract: Discusses the value of a µP supervisor reset circuit in a microprocessor-based system. Explains the terms associated with a supervisory circuit and how they should be implemented. Subjects discussed include power-on reset (...
2009-04-23 標(biāo)簽：Microproce 4106
CPU Supervisors: Frequently As
Abstract: Addresses the function of a CPU supervisor and how they can be applied to monitor a system. Discusses the function of a watchdog timer, chip enable gating pin, as well as a sense input for an early warning signal. The document al...
2009-04-23 標(biāo)簽：cpu 802
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