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...
Part Number:HDC1080 Dear AE team, We are meeting an application issue of HDC1080, different pull up resistors of SDA/SCL will result of different result. We tested the pull up resistor lower than 2.2Kohm, the communication is error with HDC1080. When changed to 10Kohm, the ...
The maximum value for an I2C pull-up resistor is limited by the line capacitance of the system to ensure the rise time of the signal can support the desired data rate. The first document here calculates the worst-case bus load of 400pF (max allowed by I2C spec), and thus limits ...
The slave board is 5V ,using CY8C4025AZI-S413, but the main board is 3.3,the pull-up resistor to 3.3V ,they communicate in I2C . Because the pins are set to open drain , I think the communication could work well , is that right? Thanks. Solved! Go to Solution. Like Subscribe ...
but it cannot drive it high. For the line to be able to go high you must provide pull-up resistors to the 5v supply. There should be a resistor from the SCL line to the 5v line and another from the SDA line to the 5v line. You only need one set of pull-up resistors for the ...
Did adding a pull up resistor solved the issue? Regards Jingyang, Teh Translate 0 Kudos Copy link Reply StefanoMarsi New Contributor I 11-23-2023 03:18 AM 5,993 Views I tried both with external Pull-Up resistors (included in the client) and adopting PU in the pads, but the...
Do I need a pullup on SCL and SDA on each chip, or just the bus? Does the pullup need to be 10K, or will just any resistance over 1K work? Top adafruit_support_carter Posts:30980 Joined:Tue Nov 29, 2016 6:45 pm Re: HT16K33 I2C wiring question - pullup resistor ...
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 ...
The I2C specification (http://cache.nxp.com/documents/user_manual/UM10204.pdf) lists the maximum total bus capacitance with a pull-up resistor to be 200 pF (it can be up to 400 pF if the pull-up is a current source, section 5.1). ...
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 ...