I'm basically a programmer so parts of data sheets are difficult for me to read.
My question is I've ordered some MCP23S17 devices and if I'm reading the data sheet correctly I can power with 3.3V and 5V on the I/O pins won't hurt it?
Voltage on VDD with respect to VSS .......................................................................................................... -0.3V to +5.5V
Voltage on all other pins with respect to VSS (except VDD)............................................................. -0.6V to (VDD + 0.6V)
It's a little confusing because further down in the DC Characteristics there are entries for Input Low/High voltage that seem to conflict?