Why Pull-Up Resistors are Necessary for I2C
When using the I2C bus, if the internal chip does not integrate pull-up resistors, two external pull-up resistors need to be added. The reason is that the I2C bus generally has an open-drain (OD) structure, where OD stands for Open Drain, meaning it is a leakage circuit, with Drain referring to the drain of the … Read more