On Tue, May 27, 2003 at 11:03:48AM -0400, Herbert Graf wrote:
> > > I'm doing a design in which I am using a Cypress SL811HS as an embedded
> > > host driven by an '877,
> >
> > Why not 18F452, especially since you're not sure exactly what you might
> > encounter along the way?  Twice the program memory, twice the speed, and
> > four times the RAM at the same price (actually lower in large quantities)
> > might come in handy.  I can't think of too many reasons for using a 16F877
> > in a new design right now.
>
>    Does anyone know if the TAIT serial programmer support the 18F series at
> all?

Sure! The hardware interface is exactly the same for High Voltage Programming.
For LVP the LVP pin has moved from RB3 to RB5. That's all.

It's strictly a software issue at every level. The instruction set is
augmented, the architecture is a bit different (and better IMHO), and the
programming algorithm is modified.

But the hardware is exactly the same.

> Is it just a change in programming algorithms

Yes.

> or do "new things" have
> to happen?

Other than the LVP issue above, not that I'm aware of.

> I'm still using the 16F877 as primary "starting PIC" and I think
> I might try going to the 18F line if it doesn't require a huge investment in
> programmers. Thanks, TTYL

Good idea. It's better than the 16F series at a similar price.

I ordered my samples for the 18F452 and 18F1320 yesterday in order to update
the software on my picprg2.3 programming software.

BAJ

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