Re: universal programmer

On Sat, 24 Dec 2005 18:44:27 -0800, Peter Bennett
<peterbb@xxxxxxxxxxxxxxxxx> wrote:

[snip...snip...]
>As I indicated above, the C$32 Atmel ISP programmer will handle all of
>Atmel's AT89Snn parts (and maybe their AVR parts, but I haven't
>checked that),so I will have a wide selection of parts to choose from
>if I find that the part I'm currently using isn't suitable for the
>next job.

Correct, the Atmel ISP does both the AVR family (AT90/ATtiny/ATmega) and
the ISP versions of their 8051 family (AT89S).

One possible gotcha (although it's obvious when you think about it) is
that the AT89 and AT90 use different polarities for the RESET pin. When
the ISP dongle is in the quiescent state, it sets its RESET output to
(IS NOT RESET) -- which, of course, is (IS RESET) for the other family.
Had me wondering what the heck I'd done wrong, the first time that I
used it across families and the chip wouldn't wake up ...

--
Rich Webb Norfolk, VA
.