Re: type of interface in dds ic ad9959 to generate a lfm signal

Hi Rahul,

It is preferable to use the 4 bit serial mode since it offers the fastest data rate. The fpga has a lot of I/O so this capability is best exploited by using the 4 bit serial mode. If you want to limit the number of traces then you can use I2C for that.

Thanks

Louijie