> I am very surprised that some keep trying to
compare MCUs
> by pin toggle rates.
> That has virtually nothing to do with MIPS, which is
> internal instruction processing. Entirely different
> aspects of speed.
But for microcontroller use, this is sometimes an important requirement...
--
Tim Mitchell
ARM7 vs ARM9 versus Cortex... LPC2939, obsolesence, etc.
Started by ●January 28, 2012
Reply by ●January 30, 20122012-01-30
Reply by ●January 30, 20122012-01-30
Thanks for the discussion, people. I appreciate the replies, especially
since they were on the weekend. Its nice to have an answer to this on
Monday morning.
From the reading I did on the weekend, I concur that the M3s are a bit
faster to a lot faster than the ARM7 devices.
I also figure the M4 is about to same to significantly faster than the
ARM9s, depending on the application and which ARM9.
The Cortex devices have a cache that is faster than accessing regular
program memory. They will give a somewhat misleading result in some of
these benchmarks if things work out just perfectly with the use of the
cache versus a more realistic (real world) use of it. But they are still
faster than their respective ARM7 and ARM9 counterparts.
since they were on the weekend. Its nice to have an answer to this on
Monday morning.
From the reading I did on the weekend, I concur that the M3s are a bit
faster to a lot faster than the ARM7 devices.
I also figure the M4 is about to same to significantly faster than the
ARM9s, depending on the application and which ARM9.
The Cortex devices have a cache that is faster than accessing regular
program memory. They will give a somewhat misleading result in some of
these benchmarks if things work out just perfectly with the use of the
cache versus a more realistic (real world) use of it. But they are still
faster than their respective ARM7 and ARM9 counterparts.
