两条线可以接在一起或者通过数字电路连接到一起实现与或运算。2.open-drain 是漏极开路的意思，,MOS管的集电极不接任何元件，要用的时候才通过电阻或者三极管，MOS管接高电平或者低电平 3.漏极开路在IIC应用总一般模拟IIC主机的时候有用，尤其是多从机的时候，如果是一个从机的话就没必要漏极开路的...
AM335x I2C Open Drain Other Parts Discussed in Thread:AM3358 On the AM3358 processor, we have a strange thing occurring on an I2C enabled pin. I do not have any pull-ups on the pin but it is still communicating. If I2C is supposed to be open drain, why is the communication stil...
您好, PCA9555 datasheet 中虽然没有描述其I2C是open drain的,但是看内部框图,SDA是OD的,我相信SCL也是OD的以兼容其他I2C设备。 pin 部分描述I2C是需要外接上拉电阻的。
Certus is pleased to offer I2C open-drain IOs across multiple process technologies. The Certus I2C IO can support external supplies of 1.8V, 3.3V and 5V at Fast Mode (400Kbps) and Fast Mode+ (1Mbps) data rates. The Certus solution features power sequence independence, a hysteresis inpu...
【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...
Open-drain与Totem-pole(开漏与推挽电路) 在最近软无系统的项目里面经常碰到开漏引脚(open-drain),在此做一些总结。 什么是开漏引脚开漏引脚是指以MOSFET的漏极作为输出的引脚。开漏是针对MOSFET来说的,对于三极管来说等效的说法是集电极开路,如下图所示:有什么用 作为输入时 与正常的管脚输入没有什么区别 作为输出...
Since signaling uses open-drain output on I2C for both signal SCL and SDA any 5V tolerant MCU will work on a 5V I2C bus Actual behavior Currently the I2C initialization setup the SDA/SCL pin in pin_mode(sda/scl, OpenDrainPullup) which cause the internal pull-up to be activated by ...
Open drain outputs are most commonly used in communication interfaces where multiple devices are connected on the same line (e.g I2C, One-Wire etc.). When all of the outputs of the devices connected to the line are in Hi-Z state, the line is driven to a default logic 1 level by a ...
Error(20783): Open Drain option is set to 'ON' for pin I2C_AUDIO_SDA~pad, but setting is not supported by I/O standard 3.3-V LVCMOS. code inout I2C_AUDIO_SDA;inout J_I2C4_DAT; reg J_sda_inreg;reg A_sda_inreg; always @(posedge fclk) begin J_sda_...
【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...