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TUSB4041I: Query whether we can use TUSB4041I without OTP & External Memory (Non-Programmed

svv karthik
Prodigy 60 points
Part Number: TUSB4041I
Other Parts Discussed in Thread: TPS2000C
Hi TI Team,
 We are using a USB HUB Device "TUSB4041IPAPQ" in our Design. Where we are planning to use the Device without any external Programming (Non-Programmable). As per the datasheet we are seeing the device need to be programmed as a Master or Slave. 
Can you please suggest, Whether we can use this device as per our above requirement & how we can configure the device for using all 4 Down stream USB's without Programming at the same time when we receive the upstream data.
Please find the attached Pictures of the Design for your reference & suggest ASAP. Also request to verify the design & suggest for any changes.    
  • 0
    TI__Guru**** 168361 points

    Hi,

    No EEPROM or SMBUS programming is needed for the TUSB4041I. The TUSB4041I can be pin configured only for normal operation. EEPROM or SMBUS is only needed if more in-depth, specialized configuration is required. Please note that if SMBUSz is pulled low, the TUSB4041I will not work as a hub until a SMBUS host sets the cfg-active bit. If you are not using SMBUS, do not set the SMBUSz pin low.

    The TPS2000C EN is active low, so you want to set the TUSB4041I PWRCTL_POL low as well to set the PWRCLT polarity to be low.

    Can you share the schematic in .pdf format?

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 60 points

    Hi David, Thanks for the response.

    Please find the attached Schematic pdf for your review & confirm if we can use this for our Application. We have updated the SMBUSz Pin as NC & also changed the USB Power Switch Device with Active High Enable. Can you please verify & suggest if any changes needed in the Design.

    USB_SCH.pdf

  • 0 in reply to svv karthik
    TI__Guru**** 168361 points

    Hi,

    Where does +5V_FIL comes from? Can you show the upstream and downstream connection?

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 60 points

    Hi David,

     +5V_FIL is taken from the Board Power Supply.

    Sorry as the application is confidential, The Upstream Interface is taken from an internal Board using Board-Board Stacked Connector & While coming to the Down stream connectivity. Two Interfaces are going to a USB Connector & remaining two Interfaces are going to an other Interface IC as a Input.

    Also We have received Eval Kit of this Module & tested the Board using PC for Upstream & Downstream to other Internal Boards & the Application is working Fine as a Plug & Play Connectivity

  • 0 in reply to svv karthik
    TI__Guru**** 168361 points

    Hi,

    Ok, I want to make sure the  +5V_FIL was not taken from the upstream VBUS. Otherwise the schematic looks ok.

    Thanks

    David