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Original question:

CCS/RM46L850: monitoring level high signal

CCS/RM46L850: HETDIN

rock
Intellectual 760 points
Part Number: RM46L850

Tool/software: Code Composer Studio

hi

PFA. please watch hetdin bit no 15 ,which is set,Can any one guide me why it so? tried hetREG1->DIN=0X00000000; STILL bit 15 =0;

thanks

rock

  • 0
    TI__Guru**** 192666 points

    Hello Rock,

    1. Please check the pinmux for N2HET1_15 pin, it might be assigned to other functionality.

    2. Please check if N2HET1_15 is pulled up on your PCB board. If this signal is pulled up, DIN is 1b always. 

  • 0 in reply to QJ Wang
    Intellectual 760 points

    hello Q J

    I have checked other module,i did not get het1_15 involvement. 2. I m using launchxl2-RM46 board. no pin is pulled up. please guide.

    for your reference please find attachment.

    thanks for reply.

  • 0 in reply to rock
    TI__Guru**** 192666 points

    Hello Rock,

    The HET has a feature that two HR structures can share the same pin for input capture. If this bit is set, the HR structure N and N+1 are connected to pin N. 

    In your setting, the pin 15 is shared. 

  • 0 in reply to QJ Wang
    Intellectual 760 points

    Hi Q J

    PFA. this is the reason for getting high state at n2het1_15.

    thanks

    Rock