Other Parts Discussed in Thread: ADC3660
Tool/software:
I would like to create a file for config and LOAD it, instead of configuring the ADC35XX EVM GUI every time. Please let me know how to do this.
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Tool/software:
I would like to create a file for config and LOAD it, instead of configuring the ADC35XX EVM GUI every time. Please let me know how to do this.
Hello,
The current version of the ADC35XX GUI on ti.com is outdated and does not include the option to load a config file. We have a newer version of the GUI that includes this functionality and we are working to get it uploaded to ti.com. In the meantime, I will reach out via email and send you the latest version.
Best,
Luke Allen
hello Luke san
Thanks for your response.
I installed and used the software. When I save and load the configuration data, does it not switch on the GUI screen?
Is there some kind of contrast table between the items that can be set in the GUI and the register settings of the ADC3660?
Best,
miyahara
Hi Miyahara san,
When you load a configuration into the GUI, the GUI does not update, it only programs the part through SPI.
There is no table comparing the register map and the features available in the GUI. The purpose of the GUI is for basic evaluation and has the functionality to configure eveything needed for each functional mode of the device. If there is something that is not included in the GUI that you would like to configure, you can use the console in the GUI to read/write directly to a register. The console also logs any registers that are read or written to while you are using the GUI. If there is something specific you'd like to configure, I can assist with any help needed.
Best,
Luke Allen
hello Luke san
Thanks for your response.
I was able to get real mode to work.
Next, I want to set up 8.3.4.2.1 FS/4 Mixing with Real Output.
How should I set up the ADC35XX EVM GUI?
CDC is set up with Ext. Clock.
The conditions here are as follows.
CLKIN :61.44MHz
DCLK_IN :61.44MHz
Fs=15.36Mhz
Fclock =7.68Mhz
Decimation Factor4
Best,
miyahara
Hello Miyahara san,
To enable the FS/4 mixing with Real Output, you will need to first configure the device in the desired configuration (number of lanes, resolution, etc.). You can then enable COMPLEX decimation, with your desired decimation factor of 4.
The FS/4 mixer can then be enabled using the "FS/4 Mixer" switches in the digital features window.
Alternatively, these can be configured by programming register 0x26, shown below.
Hello Luke san
I set it as you said and it changes to Fclock = 3.41MHz.
The expected, frequency is 7.68MHz.
Also, the output data will not be output.
Attached is a capture of the GUI screen and the clock waveform.
Please let me know what is wrong.
Best,
miyahara
Hi Miyahara san,
I will troubleshoot this in the lab tomorrow and get back to you.
Best,
Luke Allen
Miyahara san,
I have tested this on my setup in the lab, and I am seeing the same thing you are. I have reached out to the design team to get some clarification on what all is needed for this FS/4 Mixer mode. I will get back to you when I get a response.
Best,
Luke Allen
Hi Luke san
Have we heard back from the design team yet?
We are waiting for good news.
Best Regards,
miyahara
Hi Miyahara san,
Apologies for the delay, we were out of office last week due to the holiday. Yes, the design team has informed me that for the FS/4 mixer mode, the DDC block must be configured for COMPLEX deciamtion, but the output interface msut be configured as if the device were in REAL decimation mode. So, here are the steps required:
1) FCLK = 61.44MHz, DCLKIN = 123.88MHz
2) Configure the ADC for 16-bit, 2-wire mode, complex decimation by 4. Configure the sample rate and NCO frequency.
3) Enable FS/4 mixer
4) Configure output interface to real decimation mode. According to configuration table 8-9 in the datasheet, the following is needed for 16-bit, 2w, real decimation:
You can configure the FCLK source and FCLK divider in the GUI here:
Set FCLK source to bypass and FCLK Divider to by 2. You should get an FCLK of 15.36MHz.
5) In HSDC Pro, use the ADC3660_2W_16bit_CMOS option, and ensure that you set your data rate to 30.72MHz, as the output data rate is now doubled. (FS/dec factor) * 2
Dear Luke san
Thank you for your reply.
I was able to get it to work as I had thought.
Finally, we are now set up as shown on the screen with the following conditions.
Please point out any errors.
Configuration
ADC SAMPLINGRATE Fs=61.44MHz
Decimation Setting:8
# of Wire:2
Out put resolution:16bit
Output Bandwidth:7.68MHz
FS/4 Mixing with Real output
Hi Miyahara san,
Everything looks correct from what you have sent me. I am glad you were able to capture data. I am going to go ahead and close this thread. If you need help with anything else, please feel free to creade a new thread.
Best,
Luke Allen
Dear Luke san
Thanks for checking.
Thanks for the strong advice so far.
I will close this thread.
Best Regards,
T.miyahara