The pc104 uses 5 volt logic, you can see the 3.3 volt to 5 volt interface
chips near the power supply pins on the board (4 of them there).
-Curtis.
On December 5, 2005 11:20 am, pickanameanditstakensoihavethis wrote:
> hi
> i have just been looking through the diagrams and documentation
> for the ts7200
>
> my first assesment of the pc-104 was that the logic levels where at
> 3.5v logic levels and not at 5v logic levels but on a second look
> the levels for the pc-104 bus are not stated
>
> having 5v on there i suppose supports legacy devices ,but they
> appear to be driven using 3.5v logic
>
> some of the lines look buffered but some are not , rather than
> make assumptions on this i thought i would be better asking
>
> i am currently working on a custom pc-104 expansion card that is
> going to be easier to interface with 3.5 v logic levels
>
> dave
>
>
>
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