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Re: [lpc2000] Re: TDMI-S

2005-05-18 by Charles Manning

On Tuesday 17 May 2005 17:39, 42Bastian Schick wrote:
> Charles Manning <manningc2@...> schrieb am Sun, 15 May 2005
> 18:46:11
>
> > From a typical perspective (ie. people designing with the chips or
> > writing
> > software), I can't see any material difference between S and non-S parts.
>
> AFAIK, the non-S types can run higher JTAG clocks (-S types only up to 1/4
> of the
> core's clock, non-S even higher then the core-clock).

As I always tell my kids: The day you don't learn something is the day you 
die. Thanks for correcting my understanding of this.

I always thought the there was a speed restriction for all devices of 1/6 the 
core speed.

According to http://www.arm.com/support/faqdev/4168.html there is no maximum 
(apart from process issues) for hard cores (TDMI) and there is a 1/6 limit 
for soft (TDMI-S) cores for deglitching flip-flops.

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