Open-drain只能够漏电流(sink current), 如果想要集电流(source current),则需要加一个上拉电阻。 ��出低电平 常见的GPIO的模式可以配置为open-drain或push-pull,具体实现上, 常为通过配置对应的寄存器的某些位来配置为open-drain或是push-pull。 当我们通过CPU去设置那些GPIO的配置寄存器的某位(bit)的时候,...
STM32之GPIO开漏(Push-pull)和推挽(open-drain)输出 技术标签: stm32 gpio push-pull open-drainSTM32GPIO介绍: 每一个GPIO包括4个32bit的控制寄存器(GPIOx_MODER,GPIOx_OTYPER,GPIOx_OSPEEDRandGPIOx_PUPDR);2个32bit的数据寄存器(GPIOx_IDR,GPIOx_ODR);1个32位的复位/置位寄存器(GPIOx_BSRR);1个32...
**MCU的GPIO输出模式Open Drain & Push/Pull的理解**【Push-Pull推挽输出】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截止导通、Q2导通时输出低电平。Push-Pull输出,实际上内部是用了两个晶体管(transistor),此
GPIO输入输出各种模式(推挽、开漏、准双向端口)详解(techexchangeischeap) Open Drain Output vs. Push-Pull Output(Open4Tech) 公众号:汽车ECU设计
Is it possible to use GPIO described as "Push pull" in Open Drain? On the Host Interface Guide, only USB3_Event_Port1 had Open Drain and the other two were Push pull. There are check Open Drain output box on the customization tool are they consider to use it as Open Drain ...
如果只是100uA的逻辑输出能力,这里就基本可以看成是open-drain输出结构了(相对Darlington管的驱动需求来说)。所以我在GPIO上加了个1K的上拉电阻,实测电压2.8V,驱动逻辑完全正常了。(可以大概计算管子需求的电流在600uA左右) 但是,设计之初默认是所有relay都不开启,加上拉之后就变成了所有relay上电瞬间都是开启的,风...
Hello NXP engineer: As indicated in the subject, my peripheral circuit has a pull-up resistor. I want to configure the IO as open-drain when not
举例来说,S0S1就是推挽(Push-Pull)输出;而S0D1就是开漏(Open-Drain)输出。我们知道开漏输出是为了做“线与”操作的,I2C协议就需要这种配置。同理,D0S1就是源极开路输出,可以实现“线或”操作。 线与:相连的GPIO中只要有一个输出低电平,则整个线保持低电平,且不能出现短路; 线或:相连的GPIO中只要有一个输出...
一個pin通常可被設定成input、output、alternate function或analog,input會有兩種狀態表現(floating, pull-up/down),output也有兩種狀態表現(push-pull with pull-up/pull-down or open drain with pull-up/down)。 input/output方向解說 : input是指記憶體方接收來自設備的訊號源,output是指記憶體傳送訊號給設備。
_PIN_INTR_DISABLE;#endifPIN_FUNC_SELECT(pin_mux[pin], pin_func[pin]);//disable interruptgpio_pin_intr_state_set(GPIO_ID_PIN(pnum), GPIO_PIN_INTR_DISABLE);//clear interrupt statusGPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, BIT(pnum));// configure push-pull vs open-drainif(push_pull) ...