[ARTY A7 - Reasoning for 220 Ohm resistors on all ports?]

Well, I am not an interface expert, but there are series termination issues with resistor values in many ways. I think mostly people will drive wires like SPI, I2C and those require pull ups of around 120 Ohms and more. So implementing a 50 Ohms can not be usefull there. In the opposite it is possible to bridge a resistor with higher value easily by a parallel resistor. Maybe this is a solution.

P.S. I like those PMODs, because you can quickly assemble a system for test. Recently I needed a permanent I2C-Trigger and was able to do that this way in an hour.

 

[Arty A7 Board Question about Soc and FPGA using VHDL]

Moreover I would recommend to start with VHDL and write plain digital electronics rather than starting with CPU designs. Honestly it is a kind of silicon abuse to downgrade it to a CPU :-)

 

[Arty VGA MicroBlaze walkthrough posted]

Interesting. Thanks for that. To answer the question regarding BRAM? I wonder if it is possible to handle a large image in BRAM , because of the size. Maybe such a thing like coded colour.

[Strange behaviour with ARTY 100 and VGA PMOD with Digilent Example]

Thanks for sharing this project and information.

I have a question regarding the VGA-options: What is the highest frequency for the pixel clock which can be used together with this VGA option board?Is

 

[Using ARTY A7 with PMOD RS232]

25MHz pixel clock is not that high, right? What would be the highest pixel clock which can be used together with the Arty and these Ports?

 

 

[A new teaching operating system on Arty A7]

could be plz briefly describe, what is the advantage of this OS?