It all started rather innocuously. I walked into Dr GT Murthy’s office one fine day, andchanged my life. “Doc” was then the General Manager, Central R&D, of a very largeelectrical company headquartered in Bombay. In his new state-of-the-art electronics center,he had hand-picked some of India’s best engineers (over a hundred already) ever assembledunder one roof. Luckily, he too was originally a Physicist, and that certainly helped me gainsome empathy. Nowadays he is in retirement, but I will always remember him as athoroughly fair, honest and facts-oriented person, who led by example. There were severalthings I absorbed from him that are very much part of my basic engineering persona today.You can certainly look upon this book as an extension of what Doc started many years agoin India … because that’s what it really is! I certainly wouldn’t be here today if I hadn’t metDoc. And in fact, several of the brash, high-flying managers I’ve met in recent years,desperately need some sort of crash course in technology and human values from Doc!
標(biāo)簽： 開關(guān)電源
上傳時(shí)間： 2021-11-23
上傳用戶：
中通臺(tái)達(dá)plc DVP 系列 PLC Link 功能應(yīng)用說明
標(biāo)簽： PLC
上傳時(shí)間： 2021-12-06
上傳用戶：18656002513
This texts contemporary approach focuses on the concepts of linear control systems, rather than computational mechanics. Straightforward coverage includes an integrated treatment of both classical and modern control system methods. The text emphasizes design with discussions of problem formulation, design criteria, physical constraints, several design methods, and implementation of compensators.Discussions of topics not found in other texts--such as pole placement, model matching and robust tracking--add to the texts cutting-edge presentation. Students will appreciate the applications and discussions of practical aspects, including the leading problem in developing block diagrams, noise, disturbances, and plant perturbations. State feedback and state estimators are designed using state variable equations and transfer functions, offering a comparison of the two approaches. The incorporation of MATLAB throughout the text helps students to avoid time-consuming computation and concentrate on control system design and analysis
標(biāo)簽： 控制系統(tǒng)
上傳時(shí)間： 2021-12-15
上傳用戶：
1. Scope ......................................................................................................................................................................... 12. DDR4 SDRAM Package Pinout and Addressing ....................................................................................................... 22.1 DDR4 SDRAM Row for X4,X8 and X16 ................................................................................................................22.2 DDR4 SDRAM Ball Pitch........................................................................................................................................22.3 DDR4 SDRAM Columns for X4,X8 and X16 ..........................................................................................................22.4 DDR4 SDRAM X4/8 Ballout using MO-207......................................................................................................... 22.5 DDR4 SDRAM X16 Ballout using MO-207.............................................................................................................32.6 Pinout Description ..................................................................................................................................................52.7 DDR4 SDRAM Addressing.....................................................................................................................................73. Functional Description ...............................................................................................................................................83.1 Simplified State Diagram ....................................................................................................................................83.2 Basic Functionality..................................................................................................................................................93.3 RESET and Initialization Procedure .....................................................................................................................103.3.1 Power-up Initialization Sequence .............................................................................................................103.3.2 Reset Initialization with Stable Power ......................................................................................................113.4 Register Definition ................................................................................................................................................123.4.1 Programming the mode registers .............................................................................................................123.5 Mode Register ......................................................................................................................................................134. DDR4 SDRAM Command Description and Operation ............................................................................................. 244.1 Command Truth Table ..........................................................................................................................................244.2 CKE Truth Table ...................................................................................................................................................254.3 Burst Length, Type and Order ..............................................................................................................................264.3.1 BL8 Burst order with CRC Enabled .........................................................................................................264.4 DLL-off Mode & DLL on/off Switching procedure ................................................................................................274.4.1 DLL on/off switching procedure ...............................................................................................................274.4.2 DLL “on” to DLL “off” Procedure ..............................................................................................................274.4.3 DLL “off” to DLL “on” Procedure ..............................................................................................................284.5 DLL-off Mode........................................................................................................................................................294.6 Input Clock Frequency Change ............................................................................................................................304.7 Write Leveling.......................................................................................................................................................314.7.1 DRAM setting for write leveling & DRAM termination function in that mode ............................................324.7.2 Procedure Description .............................................................................................................................334.7.3 Write Leveling Mode Exit .........................................................................................................................34
標(biāo)簽： DDR4
上傳時(shí)間： 2022-01-09
上傳用戶：
The PW4055 is a complete constant-current /constant-voltage linear charger for single cell lithiumion batteries.Its ThinSOT package and low external component count make the PW4055 ideallysuited for portable applications.Furthermore, the PW4055 is specifically designed to work within USBpower specifications.The PW4055 No external sense resistor is needed, and no blocking diode is required due to theinternal MOSFET architecture.Thermal feedback regulates the charge current to limit the dietemperature during high power operation or high ambient temperature. The charge voltage is fixedat 4.2V, and the charge current can be programmed externally with a single resistor. The PW4055automatically terminates the charge cycle when the charge current drops to 1/10th the programmedvalue after the final float voltage is reached. When the input supply (wall adapter or USB supply) isremoved, the PW4055 automatically enters a low current state, dropping the battery drain currentto less than 2μA. The PW4055 can be put into shutdown mode, reducing the supply current to 25μA.The BAT pin has a 7KV ESD(HBM) capability. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presenceof an input voltage
標(biāo)簽： pw4055
上傳時(shí)間： 2022-02-11
上傳用戶：jason_vip1
有客戶反映在用ST-Link調(diào)試、下載ST8S系列單片機(jī)程序的時(shí)候出現(xiàn)了問題， 同一塊板子在二十幾天前調(diào)試均正常，現(xiàn)在重新修改就下載不進(jìn)去，無法調(diào)試。
上傳時(shí)間： 2022-02-21
上傳用戶：
某客戶工程師在某型號(hào)新產(chǎn)品的設(shè)計(jì)中，使用了STM32F103VDT6。據(jù)其工程師講述：在其產(chǎn)品設(shè)計(jì)中，為 STM32 預(yù)留了 JTAG 調(diào)試接口。然而，在軟件調(diào)試時(shí)卻發(fā)現(xiàn)調(diào)試器與器件連接失敗。所使用的調(diào)試器為 ST-Link，通過在開發(fā)板測試，確認(rèn)其功能完好。對(duì) PCB 及電纜做相關(guān)的測試，確認(rèn) JTAG 的相關(guān)信號(hào)（TCK、TMS、TDO、TDI、TRST）及電源、地連通完好，并且沒有線間短路現(xiàn)象。
標(biāo)簽： jtag
上傳時(shí)間： 2022-02-22
上傳用戶：jason_vip1
本文說明一種使用STVP_CmdLine 對(duì)STM8X 系列產(chǎn)品進(jìn)行燒寫的方法，著重介紹如何通過STVP_CmdLine 及ST-LINK進(jìn)行多個(gè)芯片的循序燒寫，幫助各戶在生產(chǎn)線構(gòu)建批量燒寫的方案
標(biāo)簽： stm8
上傳時(shí)間： 2022-03-06
上傳用戶：
目前，越來越多的應(yīng)用需要擴(kuò)展外部的 Flash 來滿足存儲(chǔ)需求。那么，在調(diào)試及批量生產(chǎn)的過程中，需要對(duì)外擴(kuò)的 Flash 進(jìn)行 燒錄操作。由于 STM32 ST-LINK Utility 以及 STM32CubeProgrammer 中，對(duì) Flash 支持的型號(hào)有限，只能覆蓋一部分 MCU 和 Flash 的型號(hào)，無法滿足客戶的需求，而且，提供的 external loader 的制作模板存在覆蓋的芯片型號(hào)較少，且無法前期 QSPI Flash 調(diào)試的問題
標(biāo)簽： stm32 flash 驅(qū)動(dòng)
上傳時(shí)間： 2022-03-08
上傳用戶：
首先下載軟件，解壓軟件，安裝在程序中找到SEGGER,選里面的J-FLASH，進(jìn)入界面，剛開始的那個(gè)界面可以忽略，不用建project也可以；單擊菜單欄的“Options---Project settings”打開設(shè)置，進(jìn)行jlink配置;正在General選項(xiàng)，選擇“USB”，一般都是默認(rèn)配置，確認(rèn)一下即可;然后在CPU選項(xiàng)，選擇芯片型號(hào)，先選擇“Device”才能選擇芯片型號(hào)，芯片型號(hào)，要根據(jù)你使用的芯片進(jìn)行選擇;在Target interface選項(xiàng) 里面選擇SWD模式;首先Target里面選“Connection”連接目標(biāo)芯片，然后 Target--Auto進(jìn)行程序燒寫;首先Target里面選擇“Connection”連接目標(biāo)芯片，然后 Target--Auto進(jìn)行程序燒寫.SEGGER J-Links are the most widely used line of debug probes available today. They've proven their value for more than 10 years in embedded development. This popularity stems from the unparalleled performance, extensive feature set, large number of supported CPUs, and compatibility with all popular development environments.
標(biāo)簽： JLINK
上傳時(shí)間： 2022-03-22
上傳用戶：
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