Other Parts Discussed in Thread: TSW54J60EVM
Hello,
I used TSW54J60EVM (to evaluate ADS54J60) and with Xilinx demo board with JESD204IP. I have obtained valid ADC data with the correct PLL/JESD settings. The sample rate is 983.04MHz, frame mode is 8224 and the sysRef divider is 768.
However, I have difficulties to get the corrector ADC word order. In the FPGA side, for each analog channel, there are 8 words: gt0[31:0] to gt3[31:0] for channel A, and gt4[31:0] to gt7[31:0]. For each channel, there are 8 16-bit words. What is the sequence of these 8 words ? Are there any registers on ADS54J60 that define the sequence ? For example, is A3[31:16] earlier than A3[15:0] ? And is A2[15:0] earlier than A1[15:0] ? Without the correct ADC word sequence, for a sine waveform, I got a sine waveform with saw-shape in each 8 words.
From the ADS54J60 datasheet, I found Figure 2 showing the N sample, N+1 sample. But it doesn't show which lane (DA0 or DA1) has a earlier sample.
The second question is the byte order within a 16-bit word, I don't know how to control it and observed random byte order. For example, for A3, the corrector byte order can be A3[31:16] and A3[15:0]. For for the same frame, A2 byte order is A2[23:16, 31:24] and A2[7:0, 15:8]. I tried to use "Flip ADC data" in the GUI, but it seems doesn't have the fully control of the byte order in one 16-bit word.
Thanks in advance for any suggestions.
-Yuke
Sampling figure in ADS54J60 datasheet
Table 11 in ADS54J60
JESD204B on Xilinx Side
