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TMS320C6748: Interconnect LCDK with AFE7222

Иван
Intellectual 370 points
Part Number: TMS320C6748
Other Parts Discussed in Thread: AFE7222, , TMDSLCDK6748

Hello! I want to try using IF tranceiver AFE7222 with DSP TMS320C6748. If I right understud the best way to connect is use uPP interface to AFE. I have some question:

1. TMDSLCDK6748 don't have uPP interface to connect external device. Whether there is a some other DK with connector for uPP interface?

2. On DSP C6748 uPP work in CMOS mode for 1.8 V?

3. How I can combine uPP for using both channel for transmit to AFE, and in other time for receive from AFE. I want use it for realize half duplex mode.

Thank you!

  • 0
    Intellectual 370 points
    After a detailed reading of the datasheets for AFE and DSP, I saw, that AFE using DDR format for two channels of ADC and DAC. Max sampling frequency for ADC in 7222 is 65 MSPS and out clock for decimation 1 is 65 MHz. But uPP interface for DDR format can get only 37.5 MHz. Do I understand correctly? In this case I can get data only with using decimation for 2 and get bandwight 37.5 MHz (for quadratures)?
    About combine two channels for half duplex I understand that it's not nessecary. Because one channel uPP using for two ADC on RX (because DDR) and one channel for DAC on RX (because DDR).
  • 0 in reply to Иван
    TI__Guru**** 161600 points
    Hi Иван,

    I've notified the design team. Their feedback will be posted here.

    Best Regards,
    Yordan