Lpc2000

--- In lpc2000@yahoogroups.com, "Leon Heller" <leon.heller@...> wrote:
>
> ----- Original Message ----- 
> From: "K B Shah-lascaux" <kbshah@...>
> To: <lpc2000@yahoogroups.com>
> Sent: Wednesday, March 15, 2006 5:02 PM
> Subject: Re: [lpc2000] ARM Thruput expectations
> 
> 
> > Running from Flash is also fast...
> > Look at pipeline architecture....
> > LPC series  from Philips semi. has memory accelerator module (MAM)
 that 
> > allows instruction and data fetch in advance ...
> >
> > k b
> >  ----- Original Message ----- 
> >  From: raweaver06
> >  To: lpc2000@yahoogroups.com
> >  Sent: Wednesday, March 15, 2006 11:36 AM
> >  Subject: [lpc2000] ARM Thruput expectations
> >
> >
> >  I'm looking into using ARM so I'm a newbie.  I currently use a
> >  processor that is 16 bits 30MIPS capable.  So seeing that ARM is 32
> >  bits and 60 MIPS capable has me wanting.  I've read that real
world is
> >  actually 52 MIPS (still above my baseline 30 MIPS).  But then
I've seen
> >  where you have to run 1/4 speed out of FLASH.  So is the 52 MIPS
number
> >  just running out of RAM?  I'll need most of my RAM for
application so I
> >  want the program to stay in FLASH.  Does running out of FLASH
mean 52/4
> >  for only 13 MIPS thruput.  I might as well stay with my current
> >  processor if so.  I might as well stop reading all of this ARM
> >  documentation if this is true.
> 
> The Philips ARM chips can run at full speed from flash, it has a128 bit 
> interface which speeds it up. They can't toggle outputs very fast,
the newer 
> chips have faster I/O but it's still nothing like the instruction rate.
> 
> Leon
>

Hi Leon,

the newer versions with fast I/O can not toggle as fast as the
instruction rate, true, but half as fast!  So you can get a pin
toggled every other clock cycle resulting in a possible outpur
frequency of e.g. 60/4 = 15.

I happen to know that many people compare this to the AVR ;-) You
would need a 30 MHz AVR to do this.

Bob