[oopic] Re: I/O lines of Oopic-C

Hi,
had a little difficult to make the match between Oopic-C pins and the
datasheet...

But, I interpreted that at least the ports I need for example to SPI-
communication with my probe, are Schmitt-t. Therefore I need to
prepare to convert volts both ways (worst scenario, if you don't know
exactly, this happens anyway). I intend to use CD5040B-circuits to do
the trick.

/M

--- In oopic@yahoogroups.com, "rtstofer" <rstofer@...> wrote:
>
> --- In oopic@yahoogroups.com, "mtiusanen" <mtiusanen@> wrote:
> >
> > On q still (which may have been answered elsewhere, so sorry
about if
> > so...): How much is the lowest voltage associated as "1" in
logical
> > 1/0 input (oDio1) of OOPic-C?
> > If I use a digital measurement-probe working at 3.3V, is that
enough
> > to trigger it?
> > BR /M
>
> This turns out to be a multiple choice question. If the port has a
> Schmitt Trigger input, the threshold voltage is higher than if it
has
> a TTL buffer. So, you need to pick an IOLine, check the OOPic
> documentation to find out what PIC port and pin it is and then check
> the datasheet to find out if that port/pin is TTL or Schmitt Trigger
> input. Then you go to Param No. D040, D040A or D041 of section 17.2
> of the datasheet to get the answer.
>
> Richard
>

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