ARTY A7 Clock Source

[samuellabrador]

For the ARTY A7 - 35T board, it possible to choose a clock in the constraints file that is greater than 100MHz? 

[D@n]

@samuellabrador,

Where would this faster clock come from?

The constraints file is designed to describe the hardware clocks on the board.  The 100MHz clock in the constraints file is described there because there is physically a 100MHz clock connected to the chip.  Vivado needs to know about this.  If you connect your own oscillator to the Arty, then it would make sense to add it to your constraint file and so tell Vivado the speed of your newly attached clock.

Alternatively, you can use a PLL to create a faster clock, but you wouldn't need to describe it in the constraints.  Vivado is smart enough to determine the speed of that clock from the setup of the PLL.

Dan