Lpc2000

How did you interpret the specs to say that you could have slew rate 
control????

The "data sheet" covers the static and dynamic electrical 
characteristics of the device but like most common digital devices these 
figures are fairly normal. 10ns is given as the typical rise and fall 
time of the outputs "as measured", not guaranteed, and certainly not 
programmable.

------------------ DATA SHEET EXTRACT ---------------------
PORT PINS              min typ max Unit
tr(o) output rise time -   10  -   ns
tf(o) output fall time -   10  -   ns

Typical ratings are not guaranteed.
The values listed are at room temperature (+25 \ufffdC), nominal supply voltages.
--------------------------------------------

Although you are welcome to ask questions it will help you to read and 
compare data sheets for other chips and digital logic in general etc. 
Try thinking about it a little more before being tempted to ask a 
question. The answers you find yourself tend to be far more valuable 
than the ones handed to you. You can be taught a lot of things but you 
only really learn and understand when you "nut it out". It's a bit like 
being a passenger in a car traveling to somewhere where you have never 
been before and then not being able to find the place again by yourself. 
But once you do find it, it's like this clear mental picture that's 
locked in your mind enabling you to vary the route and still get there.

*Peter*

croquettegnu wrote:
> I have read in the LPC214x user manual that some I/O could have 10 ns
> slew rate control.
> Does it mean that their slew rate can be configured ? because I have
> not found any registers that could allow to configure the slew rate of
> each I/O functions...
>
> That could be an interesting feature but I'm sure to have correctly
> understood
>
> Any helps appreciated!!!