MTS Design (8x8)

In the 2018.2 version of the design, all the features were the part of a single monolithic design. In the subsequent version the design has been split into three example designs based on the functionality. This section describes 8x8 (8-DAC, 8-ADC) channel MTS design. This example design is meant to demonstrate the Multi-Tile Sync (MTS) functionality of RFDC IP.

The data path for MTS design remains almost similar to that of the 2018.2 version of the monolithic design except for the reduced buffer sizes and simplification of clocking structure.

The contents of this page are as mentioned below.

Clocking and Control 

The Clock Mux (BUFGMUXs) which is present in 2018.2 design for muxing MTS and Non-MTS clocks are not present in subsequent designs. The MTS design is clocked with PL clock as shown in the figure below. To further simplify the MTS design there is a common trigger signal for all channels rather than having individual trigger for all 8-channels on DAC and ADC sides. These triggers are enabled by using channel control GPIO pins. Also the GPIO required to differentiate between Non MTS and MTS design is no longer required. The corresponding constraints for GPIOs and clock structure have also been modified. The updated constraint files are provided as the part of the TRD ZIP Package.  

For DAC


For ADC

RFSoC RFdc Build and Run Flow Tutorial

The following link will navigate the user to the RFSoC RFdc Build and Run Flow Tutorial page for further details.

Multi-tile Synchronization (MTS) Run Flow

  1. Open the RF_DC_Evaluation_UI.ini file from the UI Installation path and add the following

          [Display]

          ShowMTS = TRUE

          EnableAdvancedClocking = True

          ShowExtClock = True

         This will enable MTS, Advanced Clocking settings in UI.


     2. The UI Overview window is as shown in the following figure. By default, MTS is not enabled.


     3. Click on the Clock Settings.



     4. Set the RFPLL 1, RFPLL 2 and RFPLL 3 frequencies to 3932.16 MHz. Press Apply.



    5. Once these frequencies are chosen,the user needs to bypass the Internal PLL for all the DAC’s and ADC’s. Refer to Appendix A.1 Internal PLL to External PLL of the (RFSoC Build and Run Flow Tutorial) for steps to bypass Internal PLL and go to External PLL.


    6. Once the PLL’s are bypassed, the user needs to enable MTS. Click on MTS button of DAC in the Overview tab of the UI.



    7. Enable MTS by clicking on the checkbox and press Apply.


    8. Then, click on the Synchronize button.


   9. The MTS window looks as shown in the figure below after synchronization.

  10.  Click on the MTS button of ADC in the Overview tab of the UI.


  11. Enable the MTS by clicking on the checkbox and press Apply.



 12. Then, click on Synchronize button.


 13. The MTS window looks as shown in the figure below after synchronization.



  14. Go to Window -> Multiview -> DAC FFT.


  15. Select all DAC channels sequentially as shown in the following figure.



 16. Once all the DAC channels are chosen, clock on the Generate All button. This will generate data on all DAC channels.


  17. Go to Window -> Multiview -> ADC Time Domain.


  18. Select all the ADC channels as shown in the figure below.


   19. Once all the channels are selected, click on the Acquire button. The output looks as shown in the figure below. All the ADC channels will be in a synchronization.


Note: On the first acquisition, the data might not appear to be in sync. On successive acquisitions, the data will be in sync.

Note:1) The MTS test must be performed in BRAM mode and Multiview window only.
         2) When the user changes any configuration setting of DAC/ADC, they must apply those settings but the generation and acquisition must be done in Multiview window only.
         3) Once the MTS test is run, to re-run it again, the user must do the following:
           ▪ Disable MTS for both DAC and ADC
           ▪ Enable MTS for both DAC and ADC.
           ▪ Synchronize
           ▪ Generate and Acquire in Multiview window
        4) If interleaved spurs are noticed in ADC FFT plot, user must toggle the calibration mode of the corresponding ADC channel.

             Make sure Cal. Free button is Un-Checked before toggling the modes.

            Once this step is done, repeat step 3. Not following any of the above steps will lead to spurious outputs.

GPIO List

DACADCCommon
Function GPIO#FunctionGPIO#FunctionGPIO#
DAC0 Reset0ADC0001 Reset32DAC_3to8_Decoder_sel67:64
DAC0 Loopback select1ADC0001_IQ_Merge_sel33DAC_Global Start68
DAC0 local start2ADC0001001 local start34DAC0 BW Monitor enable69
DAC0 Future Use3ADC0001 Future Use35DAC1 BW Monitor enable70
DAC1 Reset4ADC0203 Reset36Future Use79:71
DAC1 Loopback select5ADC0203_IQ_Merge_sel37ADC Channel Mux sel82:80
DAC1 local start6ADC0203 local start38Future Use83
DAC1 Future Use7ADC0203 Future Use39ADC_Global Start84
DAC2 Reset8ADC1011 Reset40Future Use94:85
DAC2 Loopback select9ADC1011_IQ_Merge_sel41

DAC2 local start10ADC1011 local start42

DAC2 Future Use11ADC1011 Future Use43

DAC3 Reset12ADC1213 Reset44

DAC3 Loopback select13ADC1213_IQ_Merge_sel45

DAC3 local start14ADC1213 local start46

DAC3 Future Use15ADC1213 Future Use47

DAC4 Reset16ADC2021 Reset48

DAC4 Loopback select17ADC2021_IQ_Merge_sel49

DAC4 local start18ADC2021 local start50

DAC4 Future Use19ADC2021 Future Use51

DAC5 Reset20ADC2223 Reset52

DAC5 Loopback select21ADC2223_IQ_Merge_sel53

DAC5 local start22ADC2223 local start54

DAC5 Future Use23ADC2223 Future Use55

DAC6 Reset24ADC3031 Reset56

DAC6 Loopback select25ADC3031_IQ_Merge_sel57

DAC6 local start26ADC3031 local start58

DAC6 Future Use27ADC3031 Future Use59

DAC7 Reset28ADC3132 Reset60

DAC7 Loopback select29ADC3132_IQ_Merge_sel61

DAC7 local start30ADC3132 local start62

DAC7 Future Use31ADC3132 Future Use63