搜索结果

找到约 1,270 项符合 POwer-Down 的查询结果

单片机编程 Adding 32 KB of Serial SRAM to

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 consi ...
https://www.eeworm.com/dl/502/31063.html
下载: 176
查看: 1055

单片机编程 3-V TO 5.5-V MULTICHANNEL RS-2

The MAX3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge)protection on serial-port connection pins. The device meets the requirements of TIA/EIA-23 ...
https://www.eeworm.com/dl/502/31075.html
下载: 177
查看: 1052

单片机编程 DUAL DIGITAL ISOLATORS

The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are orientedin the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic inputand output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier ...
https://www.eeworm.com/dl/502/31077.html
下载: 123
查看: 1039

单片机编程 16-bit IC and SMBus I/O Port w

The CAT9555 is a CMOS device that provides 16-bitparallel input/output port expansion for I²C and SMBuscompatible applications. These I/O expanders providea simple solution in applications where additional I/Osare needed: sensors, power switches, LEDs,pushbuttons, and fans.
https://www.eeworm.com/dl/502/31099.html
下载: 122
查看: 1123

单片机编程 8-bit IC and SMBus IO Port wit

The CAT9534 is an 8-bit parallel input/output portexpander for I²C and SMBus compatible applications.These I/O expanders provide a simple solution inapplications where additional I/Os are needed: sensors,power switches, LEDs, pushbuttons, and fans.The CAT9534 consists of an input port register, ...
https://www.eeworm.com/dl/502/31107.html
下载: 40
查看: 1123

单片机编程 基于PIC单片机的脉冲电源

基于PIC单片机的脉冲电源:设计了一种金属凝固过程用脉冲电源。该电源采用PIC16F877作为主控芯片,实现对窄脉冲电流幅值的检测,以及时电流脉冲幅值根据模糊PID算法进行闲环控制。使用结果表明:该电源的输出脉冲波形良好,电流幅值稳定,满足合金材料凝固过程的工艺要求且运行稳定可靠。关键词:脉冲电源;PIC16F877单片机 ...
https://www.eeworm.com/dl/502/31144.html
下载: 100
查看: 1052

单片机编程 高压双管反激变换器的设计

高压双管反激变换器的设计:介绍一种双管反激的电路拓扑,分析了其工作原理,给出了一些关键技术参数的计算公式,设计并研制成功的30W 380V AC5 0H z/510V DC/+15.1 V DC(1A )、+5.2VDC(2A)辅助开关电源具有功率密度高、变换效率高、可靠性高等优良的综合性能。该变换器在高电压输人情况下有重要的应用价值。【关 键 词 】变 ...
https://www.eeworm.com/dl/502/31162.html
下载: 152
查看: 1132

单片机编程 水位监测报警系统原理

摘要:本水位监测报警器使用5V低压直流电源(也可以用3节5号电池代替)就可以对5~15厘米的水位进行监测,用LED显示和数码管显示水位,并可以对不再此范围内的水位发出报警。主要采用CD4066、74LS86、74LS32、CD4511芯片,再加上数码管、蜂鸣器、发光二极管、电阻这些器件组成一个简单而灵敏的监测报警电路,操作简单,接通 ...
https://www.eeworm.com/dl/502/31261.html
下载: 195
查看: 1043

单片机编程 基于PIC单片机的低功耗读卡器硬件设计

基于PIC单片机的低功耗读卡器硬件设计:本文提出了一个完整的基于串口的智能读卡器子系统设计方案并将其实现。读卡器的设计突出了小型化的要求,全部器件使用贴片封装。为了减小读卡器的体积,设计中还使用了串口窃电的技术,使用串口信号线直接给读卡器供电。为此,读卡器使用了省电的设计,采用了省电的集成电路,并大胆简 ...
https://www.eeworm.com/dl/502/31279.html
下载: 140
查看: 1067

单片机编程 MPC555的发动机电控单元小系统设计

随着当前电子技术及发动机电控技术的发展,以32位嵌入式微控制器及多任务实时操作系统为基本技术特征的新一代电子控制单元ECU(Electronic Control Unit)的开发已成为汽车电子发展应用的主流。本文在Tonadofor OSEKWorks多任务实时操作系统及32佗Power PC微控制器MPC555的基础上,介绍高压共轨柴油发动机电子控制单元的最小 ...
https://www.eeworm.com/dl/502/31337.html
下载: 53
查看: 1087