Forum Discussion
DDR output buffer and LVDS pins
Hi guys,
I've got a question. I need to output a gated LVDS clock (I know gated clocks are bad). On my MAX10 FPGA, I was planning on using a DDR buffer configured like this
ddr_output_DUMMY : ddr_output
port map (
outclock => CLK_100M_PLL,
DIN => "01",
pad_out(0) => CLK_O,
ACLR => '0',
oe => Clock_enable
);
However, I cannot connect a DDR output buffer to an LVDS pair of pins. Is this supported on the Cyclone 10 or Arria 10?
Or is there another "clean" way to gate an LVDS output clock?
Regards
2 Replies
- EngWei_O_Intel
Frequent Contributor
Hi there
You may refer to link below to better understanding the implementation and design guideline of clock gating.
Recommended Design Practices, Quartus II Handbook (intel.com)
Thanks.
- Benjamin182
New Contributor
Thanks for the reply, but the clock needs to be output from the FPGA to an ADC. And the clock needs to be gated, that's how the ADC is designed.
https://www.analog.com/en/products/ad7961.html
How should I do it with a Max 10 FPGA?