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TUSB544: TUSB544: the SLP_S0 can be always setted to be high, if OK, the consumption of TUSB544 when SLP_S0 is high?

user4363042
Intellectual 360 points
Part Number: TUSB544
Other Parts Discussed in Thread: TUSB1002

Hi,

       We want to set SLP_S0 high all the time, it's OK?

       If it's OK, the comsumption of TUSB544 when it's connected and disconnected?

  • 0
    TI__Mastermind 36085 points
    Hello,

    The option is fine, actually is the most common setting. The power consumption, when disconnected is as low as 0.65mW (The port controller must set CTL0 and CTL1 to LOW) and during connection the maximum power consumption is 578mW. If you want to know all the power consumption numbers please see the datasheet section 6.5.

    Regards,
    Diego.
  • 0 in reply to Diego Cortes
    Intellectual 360 points

    Hi Diego,

            Many thanks.

  • 0 in reply to Diego Cortes
    Intellectual 360 points
    Hi Diego,
    There are another two questions need your help:
    1. What frequency can be considered as EQ? 5GHz or other frequency? We can't find in the spec
    2. We need detail guide to set the VID and VOD, like what we can find in TUSB1002's spec:

    The TUSB1002 compensates for channel loss in both the upstream (D to C) and downstream direction (A to B).
    This is done by configuring the CH1_EQ[2:1] and CH2_EQ[2:1] pins to the equalization setting that matches as
    close possible to the channel insertion loss. In this particular example, CH1_EQ[2:1] is for path A to B which is
    the channel between USB3.1 host and the TUSB1002, and CH2_EQ[2:1] is for path C to D which is the channel
    between TUSB1002 and the USB3.1 receptacle.
    The TUSB1002 supports 5 levels of DC gain that are selected by the CFG[2:1] pins. Typically, the DC gain
    should be set to 0 dB but may need to be adjusted to correct any one of the following conditions:
    1. Input VID too high resulting in VOD being greater than USB 3.1 defined swing. For this case, a negative DC
    gain should be used.
    2. Input VID too low resulting in VOD being less than USB 3.1 defined swing. For this case, a positive DC gain
    should be used.
    3. Low frequency discontinuities in the channel resulting in DC component of the signal clipping the vertical eye
    mask. For this case, a positive DC gain should be used.
  • 0 in reply to user4363042
    TI__Mastermind 36085 points

    Hello ,

        The TUSB544 works as follows: the Upstream equalization indicates the EQ that will be applied to the receivers on the Upstream channel, as well as the Downstream equalization, indicates the EQ that will be applied to the downstream receivers. Meanwhile, the pins CFG0 and CFG1 configure both DC gains, the upstream and downstream and you can see in table 8 of the datasheet how to configure the CFG pins to the desired DC gain. The device has to be configured in this way because as you can see all 4 differential pairs are bidirectional, so It is easy to configure the gain without worry about the channel direction. (you can follow this rule: configure the EQ for upstream and downstream as all the differential pairs were inputs, and do the same for the DC gain considering all the differential pairs as outputs. THis will bring the adequate configuration regardless the channel direction).

    Regards,

    Diego.