New Contributor
New ContributorI have been able to get my USB-Blaster to work properly again.
I'd first like to thank you for the responses. The first thing I did was upload the code to the Flash Memory of the DE10-Lite, as I didn't want to keep reuploading my code. I immediately noticed that the output signal was different.
Image 1 represents the PWM of Phi 1 and Phi 2, where the maximum reached a value of 4.76V, this was when I used to upload code to the temporary JTAG.
When I uploaded the same code to the Flash Memory, I saw that the overshoot was a lot less, 4.08V to be exact. Note that this was also without termination and the setup was exactly the same(a female to male pin header was attached to the GPIO and the oscilloscope probe was attached to the male end of the pin). See image 2 for the oscilloscope output of Phi 1.
Lastly I used termination by applying a 220 Ohms series termination between the male end of the pin and the oscilloscope probe. This resulted in image 3, where overshoot was negligible.
I think that the the resistor compensated for the oscilloscope probe's capacitance, it also better matched impedance(termination), and slowed down signal rising edges. So this would mean that I have to incorporate the resistor into my PCB design right? I just started learning about termination so any advice would be helpful.
