Re: [ham] Re: PIC questions

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From: KD5NWA (KD5NWA@cbayona.com)
Date: Sat Jul 12 2003 - 22:27:32 CDT


Both the 8051 family and the AVR family are Harvard architecture, ie
separate program and data areas, one of the tricks that 8051
debuggers have to use is to add hardware to make external RAM appear
in both program and data space so they can load a program into ram
and debug it.

The 8051 is an Intel processor, and that says a lot about it, their
processors have the most complicated non orthagonal instruction set
they can get away with.

My favorite is the MSP 430 family by TI, few instructions, lot's of
addressing modes, extremely orthagonal addressing modes on
instructions, lots of peripherals, and extremely low power.

Whatever your needs are, pick something that you can live with for
small or larger projects, all these different CPU's have all sorts of
free development software, and prototype boards and programmers can
be had for a few dollars, it's a lot easier that the early days.

On 12 Jul 2003 at 22:46, John J. McDonough wrote:

> I would look at this a little differently than George.
>
> The PIC is designed to be an embedded microcontroller. It is marvelous for
> that purpose. It is absolutely no count as a general purpose microcomputer.
> For that purpose, the 8051 or 68x classes of device are far superior.
>
>> The toughest thing in starting out, though, is the inertia. There is this
> natural fear of the unknown to get over.

> 72/73 de WB8RCR http://www.qsl.net/wb8rcr
> didileydadidah QRP-L #1446 Code Warriors #35
>
>
>
> ----- Original Message -----
> From: "George Heron N2APB" <n2apb@erols.com>
> Subject: Re: PIC questions
>
>


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