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51系列IO口上拉电阻使用点滴
- 51系列IO口上拉电阻使用点滴-51 series IO pull-up resistors use a bit
QuartusIIresistance
- 关于quartusII中如何设计上拉电阻的方法.-quartusII on how to design the widening resistance.
温度传感器DS18B20程序
- 基于DS18B20的温度测量装置电图如图2所示:温度传感器DS18B20将被测环境温度转化成带符号的数字信号(以十六位补码形式,占两个字节),传感器可置于离装置150米以内的任何地方,输出脚I/O直接与单片机的P1.1相连,R1为上拉电阻,传感器采用外部电源供电。89C2051是整个装置的控制核心,89C2051内带1K字节的FlashROM,用户程序存放在这里。显示器模块由四位一体的共阳数码管和4个9012组成。系统程序分传感器控制程序和显示器程序两部分,传感器控制程序是按照DS18B20的通
Altera_FPGA-pullup
- Altera_FPGA管脚弱上拉电阻的软件设置方法-Altera_FPGA pin weak pull-up resistor settings of the software method
upanddownres
- 关于上拉电阻和下拉电阻的解释及其应用,虽然很常用但是也容易被忽略。-On the pull-up resistor and pull-down resistor interpretation and its application, although a very common but easily ignored.
test006(C51)
- 一位数码管静态显示。 * 硬件条件:1.CPU型号:AT89S52 * 2.晶振:12.000MHz * 3.用跳线帽短接JP4跳线,即P0口全部接上拉电阻。 * 4.用跳线帽短接P0.0__SMG1 * 用跳线帽短接P0.1__SMG2 * 用跳线帽短接P0.2__SMG3 * 用跳线帽短接P0.3__SMG4 * 用跳线帽短接P0.4__SMG5 * 用跳线帽短接P0.5__SMG6 * 用跳线帽短接P0.6__SMG7 * 用跳线帽短接P0.7_
dianzu
- 上拉电阻和下拉电阻的作用————详细讲解-Pull-up resistor and pull-down resistors on the role of- explained in detail
pull_up_resitance
- 对上拉电阻的作用作了比较全面的总结,不错的参考资料-The role of the pull-up resistor made a more comprehensive summary, a good reference for
Stm32lcd1602
- 这个是我自己改编的程序用STM32GPIO口直接驱动LCD1602,无需外接上拉电阻,程序移植方便。-This is my own adaptation of the procedures used STM32GPIO port directly drive LCD1602, no external pull-up resistor to facilitate porting.
PN532_I2C
- wire libraryWire协议总线通信中最为重要的一种操作,在每次总线通信之前主机必须首先发送复位信号。如程序1.1所示,产生复位信号时主机首先将总线拉低480~960μs然后释放,由于上拉电阻的存在,此时总线变为高电平。(Wire protocol, the operation of the most important of a kind of bus communication, the host before each bus communication must first se
上下拉电阻总结
- 上拉就是将不确定的信号通过一个电阻钳位在高电平,电阻同时起限流作用。下拉同理,也是将不确定的信号通过一个电阻钳位在低电平。(The pull up is to make the uncertain signal through a resistance clamp at the high level, and the resistance at the same time acts as the current limiting. The drop in the same way, is als
MCP23017+IIC接口16路IO扩展模块资料v1.1
- 模块为 I2C 接口的 16 路 IO 扩展模块,采用 MicroChip 的 MCP23017 芯片。芯片功能完备,每个 IO 可 任意配置为输入或输出,可设置使用上拉电阻。并且配置为输入的 IO 都可以启用中断功能。IO 接口驱动 能力强,灌电流、拉电流可达 25mA。(Module for the I2C interface of the 16-way IO expansion module, using Microchip MCP23017 chip. The chip funct