Referring to question here: Click here, I'd like to use the 16 channel LED driver to run my 7-segment displays. I'm using a Spartan 6 LX9 FPGA to implement a 16-bit microprocessor that will take care of it all.
The development board I'm using is pretty barebone and has an onboard 100MHz clock, or perhaps I should say oscillator. What I was planning to do is slow it down to perhaps a few megahertz, then output it via a GPIO to the LED drivers and synchronize it that way with a separate verilog module.
My question is, do I have to take special care when trying to output a clock through a GPIO? Perhaps use a particular pin? I'm given to understand that the clock input is supposed to be through a predefined pin. The clock could be slower, as it doesn't really need to be too fast.
Here's the online user manual to the development board (pretty basic): Click here.
EDIT: More information:
I'm concerned about clock skew. The chip I'm looking at writes at every positive clock edge. What I plan to do is to divide up the clock and send it out to the chip, while the FPGA also uses the same signal to synchronize and send data to the chip serially. Timing seems to be pretty tight. A slow enough clock might be the answer though.