The outputs of the PCA9518 are immediately available as soon as there is a voltage present on thesupply >~1V and behave as described above. The power-on reset of the PCA9518A keeps the outputsturned off during power-up and maintains the high impedance of the outputs throughout the power-upcycle. There is an additional built-in delay after power-up that allows the analog circuits to stabilize beforethe part is activated.
標(biāo)簽： Replacement 9518 NXP PCA
上傳時(shí)間： 2013-10-26
上傳用戶(hù)：13817753084
Although Stellaris microcontrollers have generous internal SRAM capabilities, certain applicationsmay have data storage requirements that exceed the 8 KB limit of the Stellaris LM3S8xx seriesdevices. Since microcontrollers do not have an external parallel data-bus, serial memory optionsmust be considered. Until recently, the ubiquitous serial EEPROM/flash device was the only serialmemory solution. The major limitations of EEPROM and flash technology are slow write speed, slowerase times, and limited write/erase endurance.Recently, serial SRAM devices have become available as a solution for high-speed dataapplications. The N256S08xxHDA series of devices, from AMI Semiconductor, offer 32 K x 8 bits oflow-power data storage, a fast Serial Peripheral Interface (SPI) serial bus, and unlimited write cycles.The parts are available in 8-pin SOIC and compact TSSOP packages.
標(biāo)簽： Adding Serial SRAM 32
上傳時(shí)間： 2013-10-14
上傳用戶(hù)：cxl274287265
提出了一個(gè)由AT89C52單片機(jī)控制步進(jìn)電機(jī)的實(shí)例。可以通過(guò)鍵盤(pán)輸入相關(guān)數(shù)據(jù), 并根據(jù)需要, 實(shí)時(shí)對(duì)步進(jìn)電機(jī)工作方式進(jìn)行設(shè)置, 具有實(shí)時(shí)性和交互性的特點(diǎn)。該系統(tǒng)可應(yīng)用于步進(jìn)電機(jī)控制的大多數(shù)場(chǎng)合。實(shí)踐表明, 系統(tǒng)性能優(yōu)于傳統(tǒng)的步進(jìn)電機(jī)控制器。關(guān)鍵詞: 單片機(jī); 步進(jìn)電動(dòng)機(jī); 直流固態(tài)繼電器; 實(shí)時(shí)控制Con trol System of Stepp ingMotor Ba sed on AT89C52 ChipM icrocomputerMENGWu2sheng, L ILiang (College of Automatization, Northwestern Polytechnical Unversity, Xipan 710072, China)ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi tional stepp ing motor controller.KEY WORDS: Chip microcomputer; Stepp ingmotor; DCSSR; Real2time control
標(biāo)簽： Control System ingMot Stepp
上傳時(shí)間： 2013-11-19
上傳用戶(hù)：leesuper
wifi核心板原理圖V1.0
上傳時(shí)間： 2013-10-26
上傳用戶(hù)：h886166
wifi北京郵電大學(xué)獨(dú)家資料
上傳時(shí)間： 2013-11-13
上傳用戶(hù)：zhanditian
郵票孔 貼片式 wifi 模塊
標(biāo)簽： SPEC_V 5760 WiFi wifi
上傳時(shí)間： 2013-11-06
上傳用戶(hù)：refent
大功率，遠(yuǎn)距離傳輸wifi模塊
標(biāo)簽： power High 5880 SPEC
上傳時(shí)間： 2014-12-29
上傳用戶(hù)：ljt101007
USI WiFi module specification
標(biāo)簽： Specification WM-G-MR WiFi 09
上傳時(shí)間： 2013-11-20
上傳用戶(hù)：y13567890
手機(jī)利用電腦wifi上網(wǎng)教程
上傳時(shí)間： 2014-12-29
上傳用戶(hù)：lepoke
必聯(lián)wifi模塊的規(guī)格
上傳時(shí)間： 2013-10-10
上傳用戶(hù)：BIBI
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