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TMS570LS0432: BQ76PL455A-Q1

Halid ALABAY
Prodigy 50 points
Part Number: TMS570LS0432
Other Parts Discussed in Thread: LAUNCHXL-TMS57004, BQ76PL455A-Q1

Hi,

My friends and I are working on a battery management system with which we are trying to use the "Hercules TMS570LS0432 Launchpad ---- LAUNCHXL-TMS57004" and the BMS that we are using is the  "BQ76PL455A-Q1" board.

As we searched on the internet, we found that the Texas Instruments documentations suggest that we need to get rid of 2 resistors which are placed on the 38th and 39th pins of the FT2232HL (which is on the board) in order for us to make communication between the 2.  But according to this forum one of the user removed only one resistor (R8) which is placed on the 38th pin of the FT2232HL. 

We can't understand the purpose for the removal of the resistors to create Uart communication, Also after removing the resistors would we still be able to program and debug the board using the USB connection?

Thanks in advance,

Halid

  • 0
    TI__Mastermind 49120 points
    Halid,

    The TMS570LS0432 microcontroller has a single instance of a UART interface module. This module is normally used to interface to the FTDI chip on the launchpad to support the UART data channel required for the FT2232.

    When used along with the BQ76x EVM, the dedicated UART pins are required to connect to the UART pins on the BQ76x. The connection to the FT2232 then needs to be made using another UART channel, which is created by emulating a UART interface using the programmable High-End Timer (N2HET) module. This emulated UART is done by using two N2HET pins, NHET00 (for TX) and NHET02 (for RX).

    Removing the two resistors breaks the connection from the dedicated UART pins to the FT2232. Then you connect NHET00 and NHET02 pins to the FT2232 to restore the FT2232 data channel. All functionality is still available in this case.

    Regards,
    Sunil