I have a MCF5475 which I need to work out which pins, when configured for GPIO are input (or input and output). I don't want any which are output only.
Looking at the reference manual (Table 2-1 if anyone has a copy!) I see the following columns:
PBGA Pin Pin Functions (Primary - GPIO - Secondary - Tertiary) Description I/O Drive Reset State
Most of these I know what they mean - however the I/O isn't clear. I've seen a range of values in that column, specifically: I, O, I/O, I:I/O and O:I/O. I'm guessing that I means input, O means output, I/O means Input and output - but what about the I:I/O and O:I/O?
For example - there is one line TOUT2 which can be configured for GPIO, however after much investigation, I found does not work for input. In one table I found the statement: "General purpose input is not possible on the TOUT2 pin". In this table above, I see it listed as O:I/O.
We're currently successfully using 5 lines for input. They're listed as O:I/O, I:I/O and I/O.
Any hints as to what this syntax means? I cannot find it explained in the documentation.
Incidentally, any idea what the Drive column means? I see figures of 8,
16, 24 and - in various entries.
Thanks
David