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From: boB <boB@K7IQ.com>
Newsgroups: sci.electronics.design
Subject: Re: OT: ARM makes too much noise in my view.
Date: Sat, 26 Oct 2024 20:37:41 -0700
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On Fri, 25 Oct 2024 15:52:45 -0700, Don Y
<blockedofcourse@foo.invalid> wrote:

>On 10/25/2024 3:09 PM, Uwe Bonnes wrote:
>> Arm has an enourmous debug infrastucture. Each risc implemenation
>> nearly cook there own soup. A core without debug infrastructure is
>> less attractive...
>
>They also have a boatload of predesigned/debugged IP to offer
>to their licensees.  And, a broad base of developers and fabs
>already experienced, there.
>
>The trend is pretty obvious -- MCUs are moving more and more
>towards the market that was previously the domain of CISC CPUs.
>The needs of the ever-shortening (per unit-feature) development
>cycle make it clear that the processor has to do more for the
>developer.  Witness the number of "memory protection" schemes
>that keep popping up.  The more fine-grained they are (i.e.,
>don't just protect TEXT vs DATA but, rather, *me* from *you*!),
>the more advantageous to the developer.
>
>[Think PoLP, KISS, encapsulation, information hiding, etc.
>Even if you are the sole developer, being able to protect
>one task from the actions of another is a HUGE reduction
>in debug time:  "Hmmm, why this bus error?  What the hell is
>X trying to do in Y's domain??"  Trust me, it is *so* much
>easier to get a finished piece of code when it is the ONLY
>thing you have to worry about!]
>
>

I  love the ARM cores !  Especially the ST implementations and
peripherals.

As for noise, at least ST has a spread spectrum option for
its PLLs if you wnt to enable those.

boB