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Message

Re: 5v 3,6 v IO and GPIO speed issues!

2004-12-18 by dalenkarl

--- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> 
wrote:
> 
> Hi Karl,

Hi philips, the manufacturer!
> 
> give us a break, please. 

Give us a break? You mean give you a break!
No , absolutely not! 
You give me/us the "user/s" a break instead! 

>There are things we could improve, e.g. the
> Flash interface and we did (fastest ARM7 microcontroller running 
>from
> Flash). There are things that are just not the major strength of an
> ARM microcontroller, port switching is definitely one of them.
> Honestly, our LPC900 family can switch a port just about as fast as
> the ARM can do. Now, if port switching is the major task, there 
>might be better options than ARM, however,

Well, we could turn that "very-late-provided-user-info around
and say that why didnt you mention the lousy GPIO speed in the
data sheet so the majority of users on this list havent had to
figure out that for themself! Im a minor player but i can
guarantee that there is some major players here that wasted
plenty of money to figure out that GPIO issue, what do you
have to say to them?

>performance in toggeling a pin but an order of magnitude better
>performance in number crunching, why not use......Snip, snip....

Well, this is the usual, manufacturer complaints over the
user when the user exposes a fault in the manufacturers
design in public! Im for shure are very greatful to those
list mailers who exposed this matter in public so i could 
take notice of it in time!

>In regards to the 5V / 3.3V discussion, we think it is not
>really an issue.

For me its not an issue but as you have seen some of your
customers on this list thinks it an issue and if you dont
you are out on deep water. Dont wine on me for this matter,
wine to those customer who complain about it.

Besides i had no idea that you spooked for Philips entierly?!

>3.3V, the Vdd should already be somewhere around
>2.7V.  This difference does not hurt the device but 
>we are checking with the pin design group what could happen.

Then talk to your pin design group on how they 
forgot to do something with 4 pins that turned 
out to be 4 NC pins. Or why not rectify the SSEL
pin issue!

There is no excuse for letting you coustomer be a test car dummy. 
 
Kind but reserved Regards
KD

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