The AT90S8535, and the ATMEGA32s have 8 channel 10 bit ADC's, seems strange
that the MEGA16 doesn't...

-----Original Message-----
From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On
Behalf Of Herbert Graf
Sent: Friday, 16 April 2004 10:04 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC/AVR] PIC vs AVR (ATMEL)


> What do you mean by extended I/O space that you can't use I/O opcodes
> on?  If I'm thinking of the same I/O space you are, it's because they
> managed to pack so much in to the chip, but they are limited by the
> size of the instruction word.  So they can only access the first 64
> locations, and the rest have to be accessed using the extended I/O
> operations.  No biggy.
>
> Just means that instead of
> in r16
> you have
> lds r16

        Exactly, which is to me just as annoying as banks on the PIC.

> If there's latency coming out of sleep, perhaps it's your oscillator?
> I've never had a problem with latency, especially since these chips
> are quite a bit faster than your standard pic (can't speak of the 18
> series, though some are on order).

        It's not a matter of it being a "problem", it is an annoyance, and
one that would seriously limit some of my uses (often when I use interrupts
coming out of sleep I need a very short latency to do things right).

> I'm surprised there's a chip out there that doesn't have an ADC.  I
> thought every chip since 1998 had an ADC on it.  ;-)

        Agreed, I choose the chip because I THOUGHT it had an ADC (since the
port pins were labeled in a way that made me think that), only upon closer
inspection did I find out it has comparators. TTYL

----------------------------------
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http://repatch.dyndns.org:8383/pic_stuff/

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