Phase Locked Loops (PLL's) and Delay Locked Loops (DLL) are used in various applications but there isn't yet a salient discussion of the key aspects of these circuits, how they operate, in what applications they might be used, the comparison between the two circuits and why one should be used vs....
MC9S08PT60 contains an interrupt option on a pin, so that whenever a falling edge/or raising edge (selected in software) occurs, the interrupt flag is raised.
This scenario is when the "edge trigger" mode selected.
There is also an "edge trigger OR level detection" mode. When this mode is selected, and let's say falling edge and low level detection is selected, the device will raise the interrupt flag whenever there is a falling edge, and as long as there is a LOW on this pin.
Microcontroller will raise the flag as long as the pin is LOW, no matter you clear the flag.
So, the interrupt (if enabled) is always generated.
I don't get what is this useful for?
What is this useful for?
Related reference manual section: "5.2.1.2 Edge and level sensitivity", Page 130.
@abdullahkahraman Probably if you have a situation where after you handle the interrupt, if the flag doesn't clear, you jump right back to the interrupt routine and try something else (or do the same thing but more of it). For example, keep reducing current until the over-temperature alarm clears.
@abdullahkahraman or if there are two distinct events, like a quick transition down and back up that is very fast that you don't want to miss but you also need level triggering.
All light emitting diodes have a voltage threshold defined by the asymptotes of the VI curve that intersect between 0 and its rated operating current. Low power RED LASER diodes are no exception. The threshold is near 1.6V and the rated Vf from 2.0 to 2.8 depends on product quality, size and rati...
@ThePhoton you gonna answer my question on PLL/DLL ? All the answers so far are lacj=king teh obvious reasons why you'd use one vs. the other. I beleive for you tis is a "free beer" question as Angleatlarge calls them.
@rawbrawb I'd like to but I don't have time to answer properly. Any way IIRC the others at least touch on why one or the other, but don't really focus on that part of the question.
@ThePhoton pfff a third option. I actually found a reference to 'my' definition earlier today on Google. But I'm too tired now to check the details. I never thought OP was referring to a beast of a scope like this one (I would image basic manual reading abilities when you can afford one of these).
