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Lpc2000

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Message

Re: speed of pin toggle

2004-05-05 by tsvetanusunov

--- In lpc2000@yahoogroups.com, "douglasbolton" <doug@c...> wrote:
> I believe I've set the PLL of an lpc2106 with a 14.7 mhz crystal up 
> to be 59 Mhz
> 
> However when I toggle a GPIO pin using IOSET,IOCLR,IOSET it is only 
> low for approx 200 nS. I was expecting quicker than this.
> 
> Any thoughts ???

where do you run your code from? RAM or Flash?
Flash can't work at 59Mhz (read the docs ;) and usually code from 
Flash runs slower than from RAM - make blink LED code and compile it 
for RAM and Flash - you will see visual the difference

Best regards
Tsvetan
---
PCB prototypes for $26 at http://run.to/pcb 
(http://www.olimex.com/pcb)
PCB any volume assembly (http://www.olimex.com/pcb/protoa.html)
Development boards for ARM, AVR, PIC, and MSP430  
(http://www.olimex.com/dev)

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