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 communication is correc...
Power consumption also need to take into consideration during design/debug, as when pull low the bus, there will be power-resistor-ground, pull up resistor shall not be too small. As for power consumption calculation, we can roughly get some figures by using . RP In a word, the value of...
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 ...
So, in this case the calculation is(5.0V – 0.4V) / .003A = 1533Ω. That represents the lowest possible pullup resistor value, commonly designated RPyou can use, because anything less would burn out your I2C pins. The value of the resistor would be larger with a smaller IOL, so the...
4 Example For Fast-mode I2C communication with the following parameters, calculate the pullup resistor value. Cb = 200 pF, VCC = 3.3 V Solution: Taking the values from Table 1: ( ( ) )RP(max) = tr (0.8473 ´ Cb ) = 300 ´10-9 0.8473 ´ 200 ´10-12 = 1.77 kW ( )RP...
page 32 for the maximum and minimum rise time specifications. Optimum value of pull up resistor ...
Pullup resistor calculation for I2C A customer's design wants to adjust the pull_ups value for their I2C interface, how to decide to accept their change? Is there a correct resistance value for I2C pull-up resistors? I2C Bus Pullup Resistor Calculation by TI...
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...
Please refer to the NXP I2C Specifications, for choosing the correct pull up resistors based on your data rate, bus capacitance and VDD. These are the limiting factors here. In particular, refer to the Pull-up resistor sizing section from the document. Let us know your results! Happy to he...
(i.e. shift the value one bit to the right), yielding an address between 0 and 127. However the addresses from 0 to 7 are not used because are reserved so the first address that can be used is 8. Please note that a pull-up resistor is needed when connecting SDA/SCL pins. Please...