Lowest voltage reading for a 1

[BGreen]

I'm sure its in the data sheet somewhere but I can't seem to find it and my searches here hit so much stuff I still haven't found it. I'm using a 16F676 and reading a pin that is at .68 volts. What is the minimum voltage to read a 1? Even a reference to a page in the data sheet would be appriciated if this is too dumb a question. I seem to keep getting a zero.

[mister_e]

datasheet >> Electrical Specification >> table 12-6 DC Characteristic >> Parameter D040 and/or D040A

[BGreen]

Thank you Mr E. On the 676 it is actually Table 12.7. For some reason I thought the "Read" voltage was lower than the min operating voltage but I guess I was wrong._______I was definitely wrong! Thank you again Mr E. I will note this for future ref. It helps to know where to look. I sometimes tend to get lost in the data sheets.