SH79F1622是一種高速高效率8051兼容單片機。在同樣振蕩頻率下，較之傳統(tǒng)的8051芯片具有運行更快速，性能更優(yōu)越的特性。SH79F1622保留了標準8051芯片的大部分特性，包括內置256字節(jié)RAM和3個16位定時器/計數(shù)器。此外， SH79F1622還集成了1280字節(jié)外部擴展RAM，以及存儲程序的16K字節(jié)Flash塊。SH79F1622還集成雙路音頻發(fā)生模塊，低電壓復位， TWI通訊功能， 以及觸摸按鍵與LED共享功能來節(jié)省引腳，非常適合于觸摸按鍵應用控制。此外， SH79F1622集成了看門狗定時器， EUART等功能。
標簽： 音頻發(fā)生器
上傳時間： 2022-02-13
上傳用戶：得之我幸78
Realtek交換機設計選型參考設計交換機時候，確定了具體的芯片方案廠家以后，主要考慮以下幾個方面：1：接口的情況：是要多少網口及其它延伸接口，采用什么封裝形式；2：網口的帶寬：是千兆還是百兆，或萬兆；3：協(xié)議情況：管理型還是傻瓜式；4：POE供電：是否需要通過網口給設備供電；5：供電處理：內置電源模塊還是外接供電，供電電壓和電流要求；6：針對工業(yè)應用領域，有專門的工業(yè)級方案。設計的時候，需要根據(jù)具體的結構來實施布局走線，需要綜合考慮，確保數(shù)據(jù)傳輸效率高運行穩(wěn)！結合Realtek系列方案，做一些分析推薦選型。
上傳時間： 2022-02-14
上傳用戶：ttalli
The PW2053 is a high-efficiency monolithic synchronous buck regulator using a constantfrequency, current mode architecture. The device is available in an adjustable version. Supply currentwith no load is 40uA and drops to <1uA in shutdown. The 2.5V to 5.5V input voltage range makesthe PW2053 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provideslow dropout operation, extending battery life in portable systems. PWM/PFM mode operationprovides very low output ripple voltage for noise sensitive applications. Switching frequency isinternally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors. Lowoutput voltages are easily supported with the 0.6V feedback reference voltage
標簽： pw2053
上傳時間： 2022-02-14
上傳用戶：jason_vip1
PW1555 is a programmable current limit switch with input voltage range selection and outputvoltage clamping. Extremely low RDS(ON) of the integrated protection N-channel FET helps toreduce power loss during the normal operation. Programmable soft-start time controls the slew rateof the output voltage during the start-up time. Independent enable control allows the complicatedsystem sequencing control. It integrates the over-temperature protection shutdown andautorecovery with hystersis
標簽： pw1555
上傳時間： 2022-02-14
上傳用戶：
The PW8205A8TS is the highest performance trench N-ch MOSFETs with extreme high cell density,which provide excellent RDSON and gate charge for most of the small power switching and loadswitch applications. The meet the RoHS and Product requirement with full function reliabilityapproved .
標簽： 8205a8
上傳時間： 2022-02-14
上傳用戶：wangshoupeng199
The PW8205A6S uses advanced trench technology to provide excellent RDS(ON), low gate chargeand operation with gate voltages as low as 2.5V. This device is suitable for use as a Battery protectionor in other Switching application.
標簽： 8205a6
上傳時間： 2022-02-14
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，進入界面，剛開始的那個界面可以忽略，不用建project也可以；單擊菜單欄的“Options---Project settings”打開設置，進行jlink配置;正在General選項，選擇“USB”，一般都是默認配置，確認一下即可;然后在CPU選項，選擇芯片型號，先選擇“Device”才能選擇芯片型號，芯片型號，要根據(jù)你使用的芯片進行選擇;在Target interface選項 里面選擇SWD模式;首先Target里面選“Connection”連接目標芯片，然后 Target--Auto進行程序燒寫;首先Target里面選擇“Connection”連接目標芯片，然后 Target--Auto進行程序燒寫.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.
標簽： JLINK
上傳時間： 2022-03-22
上傳用戶：
我們在完成 PCB 的設計后，要把設計文件轉換成光繪文件，一方面利于文檔保密，另一方面方便 PCB 廠家生產。 下面以一個 6 層板為例， 規(guī)范一下 Gerber文件輸出的步驟和詳細設置。 采用圖文并茂的方式，詳細介紹了Altium Designer如何生成Gerber、鉆孔文件、坐標文件。
上傳時間： 2022-03-24
上傳用戶：
本系統(tǒng)采用電動機電樞供電回路串接采樣電阻的方式來實現(xiàn)對小型直流有刷電動機的轉速測量。該系統(tǒng)主要由二階低通濾波電路,小信號放大電路、單片機測量顯示電路、開關穩(wěn)壓電源電路等組成。同時自制電機測速裝置,用高頻磁環(huán)作為載體,用線圈繞制磁環(huán),利用電磁感應原理檢測電機運行時的漏磁,將變化的磁場信號轉化為磁環(huán)上的感應電流。用信號處理單元電路將微弱電信號轉化為脈沖信號,送由單片機檢測,從而達到準確測量電機的速度的要求。In this system, the sampling resistance of armature power supply circuit is connected in series to measure the speed of small DC brush motor. The system is mainly composed of second-order low-pass filter circuit, small signal amplifier circuit, single-chip measurement and display circuit, switching regulated power supply circuit and so on. At the same time, the self-made motor speed measuring device uses high frequency magnetic ring as the carrier, coil winding magnetic ring, and electromagnetic induction principle to detect the leakage of magnetic field during the operation of the motor, which converts the changed magnetic field signal into the induced current on the magnetic ring. The weak electric signal is transformed into pulse signal by signal processing unit circuit, which is sent to single chip computer for detection, so as to meet the requirement of accurate measurement of motor speed.
標簽： 直流電動機
上傳時間： 2022-03-26
上傳用戶：
隨著光伏發(fā)電系統(tǒng)快速發(fā)展,以及電動汽車充電樁的普及,傳統(tǒng)的剩余電流保護器無法滿足實際需求。介紹了一款B型剩余電流保護器,采用磁調制剩余電流互感器和零序電流互感器采集剩余電流。根據(jù)GB/T 22794—2017標準要求,可識別1 kHz及以下的正弦交流、帶和不帶直流分量的脈動直流、平滑直流等剩余電流信號。經信號調理電路將電壓信號送到單片機進行采集和判斷。通過試驗測試,該樣機在測試精度和速度上均符合國家標準的相關要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
標簽： 電流保護器
上傳時間： 2022-03-27
上傳用戶：
