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AWR1642: The purpose and function of SYNCIN of AWR1642

Guru 16800 points
Part Number: AWR1642

Hello,

Please let me know the purpose and function of SYNCIN of AWR1642.
In the datasheet, Figure 4-3 and Figure 6-1 shows SYNCIN signal; however, the detailed description is not summarized in datasheet.

Best Regards,

Nomo

  • Hello Nomo,
    If you desire to do frame by frame hardware trigger from outside processers then the SYNC_IN signal can be used to precisely control the starting time for each frame.

    SYNC_IN pin can be used for hardware frame trigger .

    -Raghu
  • Hello Raghu-san,

    Thank you for your reply.
    I can understand.

    Best Regards,
    Nomo
  • Hello Raghu,
    I posted on other link/forum with no luck
    e2e.ti.com/.../2365734

    Schematic tracing shows that while there is an EXT_TRG_INPUT for TSW1400EVM , there is no connection or output signal from the FPGA that is driving SYNC_In on AWR1642, so i concluded from other posts (for different device, not AWR1642, that the hardware trigger should be done directly on the AWR1642 (SYNC_IN not on TSW1400EVM). Is this correct?

    Given that EXT_TRG_INPUT can drive SYNC1-4 on TSW1400EVM, would it make sense to get SYNC1-4 wired to drive d SYNC_IN on AWR1642? I'm not sure if this would be OK as we might have take into account the LVDS transmission time? (not sure).

    If i were to hardware trigger directly on AWR1642 SYNC_IN, is there any handshake/synchronisation signal between AWR1642 and TSW1400EVM, hence the connection i was thinking above will not be necessary?(assuming that when "hardware trigger" is selected in radar studio, it will then configure HSDC Pro accordingly and tell it to check for a certain hardware trigger/signal from AWR1642?

    Thanks