Hi, I want to know what is the maximum voltage for mc9s08qe32 for io digital, because I want to connect a lcd hd44780 and I dont know if could support the 5v,best regards
Absolute Maximum Ratings
Supply voltage VDD -0.3 to +3.8V
Digital input voltage VIN -0.3 to VDD+0.3
You will need to operate the 'QE32 device from a 3.3 volt supply, and the LCD display from 5.0 volts. However, assuming that the HD44780 is permanently set to write mode (as is often the case), the 3.3 volt swing from the MCU output pins should still be compatible with the switching threshold of the data and control inputs to the display. Check this is true for the display you are using.
What bigmac said is true but there are a few LCDs that use 3.3 V
such as http://www.sparkfun.com/products/9054
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