Hi EveryoneThis is my first shot at practical electronics, and i have been trying to figure out some of the notation in pin-diagramsLet me be specific.In the case of ADXL345, connections required for I2C communication are1)pin CS to be connected to VDD i/o(What is VDD i/o? and what is it in the case of an Arduino uno?)2)pin SCL to be connected to Dout(what is Dout? and specifically what is it for the uno?)3)pin SDA to be connected to D in/out(what is D in/out? and specifically what is it for the uno?)What does "External pull up resistors are necessary for proper I2C operation" mean?I know that all these are just basic stuff, but it would help me a lot, if someone clarified all this terminology. A google search for these terms, yielded a bunch of vague answers. Thanks
How do you decide on 4.7K pullup resistors?