Hi,I tried to program the AD9914 DDS with the parallel programming mode. I made the following procedures but cannot see any output in the spectrum analyzer.0- I reset the board by sending an active high pulse on the RST pin and change it to zero.1- I set the F[3:0] = 0000 to select the parallel interface.2- I set the D[31:0] = 0x 00 04 0A 02 to select the 0A parallel address, set as 04 to enable the PLL and set this parameter in write mode as wr is active low.3- I set the D[31:0] = 0x 00 01 03 02 to calibrate the VCO4- I set the D[31:0] = 0x 00 01 0F 02 to calibrate the DAC.5- I change the F[3:0] = 0010 and set the D[31:0] = FTW and change the IO_UPDATE as 1.I suspect I cannot set the appropriate values to the registers because I cannot see anything on the SYNC_CLK with the PLL enable.Can you help me with this issue?
I 'm able to read the default parameters of the registers with the parallel programming mode. But I cannot write to the values.
here is a screen shot what is happening in the board. Any guess why this would happen.