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Original question:

IWR6843ISK: Details for connector between IWR6843ISK and MMWAVEICBOOST

IWR6843ISK: Interface Board for IWR6843ISK UART

Ming See
Prodigy 160 points
Part Number: IWR6843ISK
Other Parts Discussed in Thread: UNIFLASH, , MMWAVEICBOOST

I am making an interface board for the IWR6843ISK, may I ask what pins do I need to breakout to use UART to flash the board using Uniflash, and then receive the point cloud data from the radar (option for both UART and SPI)?

I will be using the same HD connector as that on the MMWAVEICBOOST and breakout the pins from there. 

  • 0
    TI__Genius 10816 points

    Hi Ming,

    Please refer to the user guide for the pinout of the 60-pin HD connector on page 20, table 6:

    https://www.ti.com/lit/ug/swru546c/swru546c.pdf?ts=1594823276054&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FIWR6843ISK

    Use the pinout for the J4 connector on the MMWAVEICBOOST, as that is the connector that the IWR6843ISK would connect to.

    Regards,

    Brennan

  • 0 in reply to Brennan Hartigan
    Prodigy 160 points

    Would that mean I need all the supporting chips (e.g. U7 [TPD4E004DRYR] and U8A [TM4C1294NCPDTT3] and U28 [TS3A5018RSVR] are circuit protection / analog switches that the HD connector signals go through before going to J4) in order to use the UART interface on the IWR6843ISK?

  • 0 in reply to Ming See
    TI__Genius 10816 points

    To be more clear, if you are breaking out pins from the J1 60-pin HD connector on the IWR6843ISK, use the J4 pinout on the MMWAVEICBOOST as a reference, as those two connectors are paired if the MMWAVEICBOOST was being used (in your case, it is not, correct?).

  • 0 in reply to Brennan Hartigan
    Prodigy 160 points

    May I ask which pins from the J4 pinout on MMWAVEICBOOST do i need to connect to in order to use the UART interface for transmitting and receiving data, and flashing the antenna board using Uniflash?

  • 0 in reply to Ming See
    TI__Genius 10816 points

    To be clear, you are trying to break out pins from the J1 connector on the ISK board.  The J4 connector on the MMWAVEICBOOST board mates with the J1 connector, so the pinout of J4 can be used as a reference to determine the pinout of the J1 connector on the ISK board. 

    Specifically, the pins you need to break out in order to program the board and run the out of box demo to use the UART interface include any pins related to UART, all TX and RX pins (for antenna data), MSS_LOGGER, and options to set the SOP lines.  The exact pin numbers can be found on page 20, table 6 of the user guide:

    https://www.ti.com/lit/ug/swru546c/swru546c.pdf?ts=1594823276054&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FIWR6843ISK 

    If you want to use SPI, you will also need to breakout all 4 SPI lines.  Note that the demos provided by TI only use UART, and you will have to make your own software updates to support SPI.

  • 0 in reply to Brennan Hartigan
    Prodigy 160 points

    Thank you for the clarification, so the pins (following MMWAVEICBOOST schematic on J4) that we need are:

    1. RADAR_MSS_LOGGER_SPIB_CLK for radar point cloud data
    2. 60PIN_JTAG_TDO_SOP0
    3. RADAR_SYNC_OUT_SOP1
    4. RADAR_PMIC_CLKOUT_SOP2 to control SOP headers
    5. RADAR_RS232RX
    6. RADAR_RS232TX to send chirp config to the radar API
    7. PMIC_EN to enable on-board PMIC
    8. RADAR_NRST to reset when changing chirp config
    9. The 4 SPI pins for SPI bus (CS,CLK,MISO,MOSI)
    10. Various power and GND pins (1V~5V)

    When connecting to the IWR6843ISK through the MMWAVEICBOOST XDS110 connector, the device shows up as two ports (UART and Data) due to the on-board XDS110 emulator. How can I wire RADAR_MSS_LOGGER and the RS232 pins such that it will still display as two ports? Do I need to have two separate UART buses, or an additional microcontroller to emulate this?

    Do I need to supply all the various voltages through J4 or can I just supply 5V and 3.3V?

  • 0 in reply to Ming See
    TI__Mastermind 33805 points

    Hi,

    Yes, you need the MSS, UART RX and TX, SOP 2:0 and the 4 SPI lines.

     

    Ming See said:
    How can I wire RADAR_MSS_LOGGER and the RS232 pins such that it will still display as two ports? Do I need to have two separate UART buses, or an additional microcontroller to emulate this?

    if you are using the XDS110 you can connect both UART port as shown in the MMWAVEICBOOST schematic. If using a different emulator, you need to consult the emulator manufacturer.

    Ming See said:
    Do I need to supply all the various voltages through J4 or can I just supply 5V and 3.3V?

    the IWR6843ISK is power by the 3V3 line input to the onboard PMIC, this 3V3 lnput rail and the PMIC output provides all the needed voltages on the antenna board.