I am working with Atmel's At90USB128 and wanted to figure out what the input high/low voltage was for the SPI communication. In the spec sheet , I noticed that there seemed to be two conflicting information. Under the "electrical characteristics" section of the spec sheet, I saw this:
And under the "typical characteristics" section of the spec sheet, I saw this. .
Clearly, the numbers are conflicting on the table and the graph. With the table giving a much higher input high voltage, and much lower input low voltage. What exactly is the difference between them?