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TCAN1043-Q1: Bit Timing Register setting of Sample mode information

user4979899
Expert 3080 points

Part Number: TCAN1043-Q1

Hi Sir,

We are looking for BTR(Bit Timing Register) setting of TCAN1043-Q1 in below table but lack of “Sample mode” information.

Could you please help on it?

Thank you

BTR Parameter

Value

 

 

Number of Tq

25

Tseg1 (prop_seg + phase_seg1)

69

Tseg2 (phase_seg2)

10

Sample point (%)

0.875

Synchronisation Jump Width (SJW)

1

Sample mode (single or 2 out of 3)

 ???

Baud Rate Prescaler (BRP)

 1

SW logging:

  • 0
    TI__Guru 74922 points

    Anne,

    Sample mode is the way in which the controller samples each bit: single sample or majority mode. In single sample mode, the bit is sampled once at the sample point and that logic value is accepted as the value by the controller. In majority mode, the CAN bus signal passes a digital low-pass filter, using three samples and majority logic to determine the bit value. The majority mode adds additional delay of 1 time quanta resulting in a longer Prop_seg.

    Please let me know if you have any other questions.

    Regards,

  • 0 in reply to Eric Hackett
    TI__Expert 3080 points

    Hi Eric,

    Thanks for feedback. Can I say the sample mode selection should be control by SW?

    If yes, can I read the sample mode setting from Host-MCU? Or any method to get this information?

    Thank you

  • 0 in reply to user4979899
    TI__Guru 74922 points

    Anne,

    Yes, the sample mode is in the CAN controller configuration code, based on the customer's application. Is the customer requesting this information?

    Regards,