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Doubt about external control of AD9959

Question asked by Javier369 on Jul 10, 2018
Latest reply on Jul 12, 2018 by mcee

Hi everybody,

 

I was wondering if someone could help me to program the AD9959 Eval Board step by step  using an FPGA. I am not an expert in this kind of things (SPI protocol) so, I will appreciate any help from anyone.

 

1. Do I have to send a clock in the pin "SCLK" from the FPGA? When I send this clock, I also have to send the bit information in STDIO_0?

 

2.To change from one register to another do I have to send a signal to I_O Update pin?

 

3. Do I have to send always a signal to the pin "Reset" when I start to send the register infromation (series of 1 and 0) from the FPGA to the AD9959?

What else do I need to have in mind?

 

Thanks so much for your help.

 

Best Regards,

 

Javier

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