I2C_Pullup_Resistor_CalculationSt**en 上传281.49 KB 文件格式 zip I2C是一种常用的串行通信协议,用于连接微控制器和外设。在I2C总线上,为了确保数据传输的可靠性,需要使用上拉电阻来提供总线上的恢复电流。 I2C上拉电阻的计算需要考虑两个主要因素:总线电容和总线速度。总线电容是指总线上所有设备的电容负载,包括...
Pullup resistors need to be connected from the I2C lines to the supply to enable communication as shown in Figure 1. The pullup resistors pull the line high when it is not driven low by the open-drain interface. The value of the pullup resistor is an important design consideration for ...
I2C tutorial: Use this 10 minute guide to learn all about the 2 wire I2C serial protocol. Learn how easy it is to use, how it works and when to use it...
An I2C pull-up resistor self-adjusting circuit and an I2C pull-up resistor self-adjusting method, relating to the field of server system design. The self-adjusting circuit comprises a time information obtaining module and a pull-up resistor adjusting module; the time information obtaining module ...
pull-up value to a fairly low resistance (~1k - 2k). The example in the P82B715 datasheet does not use worst-case values and instead does it's calculations based off the estimated bus capacitance between 30pF and 50pF. Because this capacitance is much smaller, the pull-up resisto...
Figure 2. An I2C pull-up resistor connection. The most important hardware parts are pull-up resistors, which are used by the SDA and SCL lines. I2C compatible devices connect to the bus with open collector or open drain pins, which pull the line low. When there is no tra...
example system. For this example, we'll assume the bus is loaded down with lots of high input capacitance parts, so that the total bus capacitance is 50pF. We'll be running the system in Fast mode at 400 kHz and with a power supply of 3.3V. What pull-...
As u see in the diagram three slaves are connected to the same I2C Master and there is two pull-up resistor which is required for the I2C device to communicate properly this is because the I2C protocol works on the SCL and SDA bus lines which are an open drain or open collector the tr...
Notice the two pull-up resistors on the two communication lines. Resistor selection varies with devices on the bus, but a good rule of thumb is to start with4.7kΩresistor and adjust down if necessary. I2C is a fairly robust protocol, and can be used with short runs of wire (2-3m)....
2 protocol 2.1 signals SDA and SCL arebidirectionallines, connected to a positive supply voltage via a current-source or pull-up resistor. Both lines areHIGHwhen the bus is free. Input reference level are set as30% and 70%of VDD, VIL= 0.3VDD, VIH= 0.7VDD ...