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TMS570LS3137: TMS570LS3137 MIBSPI Slave configuration

Kalyan Vagvala61
Expert 1075 points
Part Number: TMS570LS3137


Hello,

We are using TMS570LS3137 microcontroller MIBSPI interface as a slave and configuring MIBSPI pins as pull down by using SPI Pin Control Register 8 register.

During our code execution external master sees MIBSPI data as 1's even though the transmitter buffer is filled with zeros. what could be the reason for this?

After Reset what will be status of MIBSPI pins? are they pulled down or pulled up?

Thanks,

Kalyan

  • 0
    TI__Mastermind 21425 points
    Hello,
    Reset pull state of MIBSPI1 of TMS570LS3137 is as follows:
    MIBSPI1CLK - pull-up;
    MIBSPI1NCS[0] - pull-up;
    MIBSPI1NCS[1] - pull-up;
    MIBSPI1NCS[2] - pull-up;
    MIBSPI1NCS[4] - Pul-down;
    MIBSPI1NCS[5] - Pul-down;
    MIBSPI1NENA - pull-up;
    MIBSPI1SIMO[0] - pull-up;
    MIBSPI1SIMO[1] - Pul-down;
    MIBSPI1SOMI[0] - pull-up;
    For this and for the other MIBSPI ports, pull states could be found in Table 4-10 of device datasheet.

    Please, ensure whether slave port is prepared before master starts communication.

    Best regards,
    Miro
  • 0 in reply to Miro
    TI__Mastermind 21425 points
    Hello,
    Do you have some progress?

    Best regards,
    Miro
  • 0 in reply to Miro
    TI__Mastermind 21425 points

    Hello,

    I am closing this thread because there is no activity. Please write bellow or open new thread if your need further assistance.

    Best regards,

    Miro