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Altera_Forum's avatar
Altera_Forum
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9 years ago

syncronize nco on different fpga

Hi, i've to generate two sinusoidal signals (about 70Hz) with two different altera ip nco implemented i 2 different fpga (CLK=50MHz and CLK_EN=25khz). The sinusoid is sampled @ 25khz. The pr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Unfortunately the system is composed by two different fpgas with 2 different clocks' sources because the fpgas are located on 2 independent boards. The sync pulses come from an external cpu (another board in the system).

I'd like the idea of PLL but i don't know how to implement it....

The simplest way for me in order to avoid heavy changes on alredy written code is acting on NCO inputs.

Have you any ideas?

Thanks