Lpc2000

----- Original Message ----- 
From: "markevans_1" <markevans@...>
To: <lpc2000@yahoogroups.com>
Sent: Tuesday, June 28, 2005 2:01 AM
Subject: [lpc2000] How fast can it go?


> Hi guys,
> I am finding it a little tricky to calculate how fast this chip can
> actually go for my app. (Instruction cycles and MAM)
>
> I was wondering if anyone can tell me how fast it would execute this
> code at 60MHz:
>
> Read in 16 bits from port1
> store in RAM
> increment pointer
> loop for N times
>
> I basically want to buffer data as fast as possible in bursts. Ideally
> at 20MHz.
>
> How much faster would it execute in RAM.
> Could I make it faster by using an infinite loop and using a timer to
> 'break out' of the loop.

The limiting factor is reading in the data from the port, it's very slow. 
You won't get anything like 20 MHz, 3 MHz max. at a guess.

Leon 



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