xc9536 increase to 50mhz frequency

EDAboard.com Forum Index -> PLD, SPLD, GAL, CPLD, FPGA Design -> xc9536 increase to 50mhz frequency

Author

Message

bolo13

Joined: 23 Oct 2009
Posts: 2

23 Oct 2009 21:37 xc9536 increase to 50mhz frequency

hello
i have 20 mhz input and i want to multiply this frequence to 50 Mhz to provide in output.
i'm a begineer and i need to know how i can do this in vhdl or verilog.
Regards

Google
AdSense
Google Adsense

23 Oct 2009 21:37 Ads

ckaa

Joined: 06 Apr 2006
Posts: 15
Helped: 4

28 Oct 2009 14:36 Re: xc9536 increase to 50mhz frequency

You'll need a PLL to create a 50MHz clock from a 20 MHz clock. If this code is aimed towards a FPGA you can use one of the PLL ips available with your vendor. If not you could search this forum and you'll see lots of posts talking about implementing a PLL in verilog.

FvM

Joined: 22 Jan 2008
Posts: 5161
Helped: 767
Location: Bochum, Germany

28 Oct 2009 14:45 xc9536 increase to 50mhz frequency

x9536 is a CPLD without any PLL resources.

farhada

Joined: 01 Oct 2004
Posts: 337
Helped: 41
Location: Nice, France

28 Oct 2009 16:40 xc9536 increase to 50mhz frequency

If you have a 7ns version or faster type of this CPLD, you maybe able to create 40 and 80MHz clocks from your 20MHz, but it will not be a stable creation and it will be highly unreliable.

50MHz will be very difficult.