On Friday, Jan 2, 2004, at 04:31 US/Pacific, Olin Lathrop wrote:

>
> Lee Wright wrote:
>> I'm having trouble with a PIC16F628 sending data @ 2400 baud and
>> using internal OSC.
>
> That's not surprising, since the oscillator can be up to 8.75% off and
> 5.8%
> is the guaranteed to fail limit of RS-232 for 8 data bits.
>
>
heh.  Is it really a 16F628, or a 16F628A?  This seems to be one of the
big
changes between the two, with the A version proudly proclaiming a 1%
accurate
intosc (still better than 5% over voltage and temp ranges, according to
the
data sheet.)  I guess they got (rightfully) yelled at for making an
internal
oscillator that wasn't accurate enough for serial comm...

BillW

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