Tagged Questions
6
votes
2answers
94 views
process timing on FPGA
I'm new to fpgas, and there are some timing subtleties that I'm not sure I understand: if all my synchronous processes are triggered on the same edge, then that means my inputs are 'captured' on one ...
0
votes
1answer
191 views
Can someone help check my solution for this timing diagram?
I've been working on some timing diagrams and I keep mixing up the behaviors for the different flip flops.
EDIT:
I think I have the logic correct. If someone could please let me know if I'm ...
1
vote
2answers
117 views
Is there a glitch / race condition at the output of this circuit?
The input rising and falling edges occur at time t = 0. The propagation delays of the respective gates are 3 and 4 ns, as shown.
According to my analysis, the waveforms are as below:
As I've ...
2
votes
2answers
91 views
Gate Logic Initial States?
This is probably a silly question but I figured this might be worth another question instead of adding it onto my other one.
Referring to this question (About an SR latches first Q state)
What is the ...
4
votes
3answers
2k views
What is hold time violation?
I am currently reading about Pulsed Latch Circuit. And there is a frequent mention of "hold time violation". Like:
For latch, "...data must be held for a longer period of time,
increasing the ...
2
votes
1answer
190 views
RAM writing simulation in VHDL
Writing a value to RAM is a small part of my project, everything is working, but I cannot explain one thing related to RAM/digital timing.
I will write a description in regards to picture I added.
...
-2
votes
3answers
381 views
Implementation of traffic lights
I'd love your help with implementation of traffic lights of 15 second cycle.
The red light is on for 6 seconds, then the yellow (At the same time with the red for two seconds), then the green light ...
6
votes
4answers
235 views
How to find the earliest edge
______
A _____| |________
______
B ______| |_______
Which edge arrives first?
I have two digital pulses that arrive at almost the ...
0
votes
3answers
303 views
Multiple pulses from single button press
I am working with a 74HC193 binary up/down counter, and am trying to set up a button to increment or decrement it. The procedure to increment a single step as I understand it is:
Set pin 4 high
...
