Hi,
I am using ADS54j66 ADC on my board, and I have met some questions.
1. I want to use DDC mode 8, my sysref clk is 25MHz and sampling clk (clk input at CLKINP/M) is 250MSPS, is the Serdes line rate is just 5Gbps (10Gbps at 500MSPS)?
2. After the initial configuration as follows, I found the registers in page 6141 and page 6900 haven't been set (When I read these registers, they are all 00h). After I reconfigured these registers, I read their values. The registers in page 6141 are the values I set, but the registers in page 6900 are always 00h. I don't know if I have correctly configured these registers.
//Reset
24'h0000_81;
24'h4004_68;
24'h4003_00;
24'h60F7_01;
24'h60F7_00;
24'h70F7_01;
24'h70F7_00;
//Analog
24'h0011_80;
24'h0039_C0;
24'h0053_80;
24'h0059_20;
//IL Reset
24'h6000_01;
24'h6000_00;
24'h7000_01;
24'h7000_00;
//DECIMATION FILTER PAGE
24'h4003_41;
24'h4004_61;
24'h6000_08; //mode 8
24'h7000_08;
24'h6001_04; //always write 1
24'h7001_04;
//JESD ANALOG PAGE
24'h4003_00;
24'h4004_6A;
24'h6017_40; //PLL reset
24'h6017_00;
24'h7017_40;
24'h7017_00;
24'h6016_02; //JESD PLL mode 40x
24'h7016_02;
//JESD DIGITAL PAGE
24'h4003_00;
24'h4004_69;
24'h6000_C0;
24'h7000_C0;
24'h6001_01; //JESD mode 20x
24'h7001_01;
24'h6006_09; //k = 10
24'h7006_09;
24'h6005_80; //scramble enabled
24'h7005_80;
