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SN65DP141: register configuration recommendation for SN65DP141

Ken Zhang
Expert 3575 points
Part Number: SN65DP141

Tool/software:

HI,

Two pcs of SN65DP141 are used in a my account with the connection architecture in the attach. would you like kindly help to recommend a initiation register configuration for SN65DP141?  

SN65DP141-BLG.pptx

  • 0
    TI__Mastermind 38685 points

    Hey Ken,

    I can provide a general template as follows.

    Fullscreen SN65DP141 Script Template.txt Download 
    IC1 script:

0x00 0011 0100 // I2C control, normal operation, all channel track channel 1, trace mode
0x01 0000 0000 //enable all channels
0x02 0xxx xxxx // channel 0 control
0x03 0000 0xxx // channel 0 enable stettings
0x05 0zzz zzzz // channel 1 control settings 
0x06 0000 0z00 // channel 1 enable settings
0x08 0xxx xxxx // channel 2 control
0x09 0000 0xxx // channel 2 enable stettings
0x0B 0xxx xxxx // channel 3 control
0x0C 0000 0xxx // channel 3 enable stettings

IC2 script:

0x00 0011 0000 // I2C control, normal operation, all channel track channel 1, cable mode
0x01 0000 0000 //enable all channels
0x02 0xxx xxxx // channel 0 control
0x03 0000 0xxx // channel 0 enable stettings
0x05 0zzz zzzz // channel 1 control settings 
0x06 0000 0z00 // channel 1 enable settings
0x08 0xxx xxxx // channel 2 control
0x09 0000 0xxx // channel 2 enable stettings
0x0B 0xxx xxxx // channel 3 control
0x0C 0000 0xxx // channel 3 enable stettings

    Please use the following table to tune the EQ to your system:

  • 0 in reply to Vishesh Pithadiya
    TI__Expert 3575 points

    Vishesh

    would you like to double check if the trace mode/cable mode corresponding to the EQ_mode pin and EQ_mode bit is the opposite? 

  • 0 in reply to Ken Zhang
    TI__Mastermind 38685 points

    Hey Ken,

    These setting are for two different use cases. Pin 35 will determine the trace/ cable mode when the device is in pin-strap mode. This means that the I2C control is disabled. 

    In I2C mode pin 35 is the ADD2 pin which controls the address of the device. In I2C mode the register 0x00 controls the trace/ cable mode. 

  • 0 in reply to Vishesh Pithadiya
    TI__Expert 3575 points

    hi, Vishesh

    Is there a document detailing the DC Gain and AC Gain parameters for DP141? DC gain and AC gain are best illustrated by comparing input and output waveforms of DP141.

  • 0 in reply to Ken Zhang
    TI__Mastermind 38685 points

    Unfortunately, we do not have any illustrations comparing the DC and AC gain as the magnitude of the equalization will vary depending on trace length (insertion loss), and trace quality (return loss/ noise/ crosstalk).

    We leave it up to the customer to properly tune the device. We have a reference schematic and layout available which may be helpful. The EQ is easily changeable, so the main focus of design when using the DPD141 is making sure the max EQ capabilities of the device meet the loss of the trace/ cable used.