在配置GPIO(General Purpose Input Output)管脚的时候,常会见到两种模式:开漏(open-drain,漏极开路)和推挽(push-pull)。对此两种模式,有何区别和联系,下面整理了一些资料,来详细解释一下: 一、Push-Pull推挽输出 1、原理 输出的器件是指输出脚内部集成有一对互补的MOSFET: 当Q1导通、Q2截止时输出高电平; 而当Q1...
Open drain output has higher power consumption during active transfers due to the pull-up resistors that are used. In general, the push-pull output has faster slopes than the open drain output.
而open-drain所消耗的电流相对较小,由电阻R所限制,而R不能太小,因为当输出为低电平的时候,需要sink更低的transistor,这意味着更高的功耗。(此段原文:because the lower transistor has to sink that current when the output is low; that means higher power consumption.)而open-drain的好处之一是,允许你csho...
什么叫开漏输出,Open-drain output 关键字:开漏输出 开漏输出:OC门的输出就是开漏输出;OD门的输出也是开漏输出。TTL电路有集电极开路OC门,MOS管也有和集电极对应的漏极开路的OD门,它的输出就叫做开漏输出。它可以吸收很大的电流,但是不能向外输出电流。所以,为了能输入和输出电流,它使用的时候要跟电源和上拉电阻一...
在配置GPIO(General Purpose Input Output)管脚的时候,常会见到两种模式:开漏(open-drain,漏极开路)和推挽(push-pull)。对此两种模式,有何区别和联系,下面整理了一些资料,来详细解释一下: 一、Push-Pull推挽输出 1、原理 输出的器件是指输出脚内部集成有一对互补的MOSFET: ...
开漏输出(Opendrainoutput)OpendrainoutputOpendrainoutputisopendrainoutput,verysimilartothecollectoropencircuit,theworkingprincipleisthesame.Thedifferenceisthatthefieldeffecttransistorsareused.Pullresistorsshouldbeusedinuse.Reference:opencollectoroutput(OC),drainopenoutput(OD),pushpulloutput.Whyopendrainoutput?Whatare...
开漏输出(Open drain output)
开漏输出(Open drain output) Open drain output Open drain output is open drain output, very similar to the collector open circuit, the working principle is the same. The difference is that the field effect transistors are used. Pull resistors should be used in use. Reference: open collector ou...
开漏输出(Open drain output) Open drain output Open drain output is open drain output, very similar to the collector open circuit, the working principle is the same. The difference is that the field effect transistors are used. Pull resistors should be used in use. Reference: open collector ...
Open-Drain与Push-Pull GPIO的功能,简单说就是可以根据自己的需要去配置为输入或输出。(General Purpose Input Output,简称为GPIO或总线扩展器,利用工业标准I2C、SMBus?或SPI?接口简化了I/O口的扩展。当微控制器或芯片组没有足够的I/O端口,或当系统需要采用远端串行通信或控制时,GPIO产品能够提供额外的控制和监视...