Lpc2000

Hi TomW
 
I think you have right, but I'm interesting where the limits are.
Philips must have limits in fall and rise time but I can't find them in
any datasheets. In my opinion this are important datas for developers in
hardware.
 
Best regards
Martin
 

________________________________

Von: Tom Walsh [mailto:tom@...] 
Gesendet: Freitag, 3. Februar 2006 16:20
An: lpc2000@yahoogroups.com
Betreff: Re: [lpc2000] Rise and fall time of capture inputs


widescreen03608 wrote:

>Hi all,
>
>On the CAP0.3 input I have pulses from an encoder and I want detect
>both edges and generate interrupts. The signal is filtered so the rise
>and fall time are slow (don't know exactly how long, but surely within
>1ms). Is it possible that no interrupt is generated on CAP0.3, because
>the signal is to slow?
>
>I didn't found any datasheets from Philips which this is described.
>
>  
>
Aside from the datasheet thing, wouldn't it be possible to use a schmidt

gate to drive the capture intput?  Or some op-amp crossing-detector with

hysteresis?

Regards,

TomW



>Thanks for help
>
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> 
>Yahoo! Groups Links
>
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-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
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