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TUSB4041I: How to disable unused pins

TS Yang
Genius 4800 points
Part Number: TUSB4041I


Hi,

My customer is using NEC's UPD720114 device, and the existing product is no problem at present, but we are in the process of transition to consideration of TI.

The TUSB4041I has a large PKG size and about twice as many pins as the existing products, but many pins are not used.

I need your help with the pin assignments and disabling methods for pins listed as TUSB4041I and UPD720114 pin matching and functions not found in UPD720114.

In addition, If you have any comparison data with NEC's UPD720114 product, please share it.

thanks,

TS

  • 0
    TI__Expert 7395 points
    Hello TS,

    I just sent you an email with the requested information. Please let me know if you have any specific questions on any of our device's features or configurations.

    Thanks,
    Jorge
  • 0 in reply to Jorge Llamas (SWAT)
    Genius 4800 points
    Hello Jorge,
    thanks for your comparison presentation file.
    Actually, we need the method to disable unused pins of TUSB4041I.
    If it's impossible, please just reply that we can't.
    thanks,
    TS
  • 0 in reply to TS Yang
    TI__Expert 7395 points
    TS,

    When you say "unused pins", are you referring to unused downstream ports?
    If that is the case, unused ports should be left floating and, for compliance purposes, you could specify which ports are unused through the "Port Used Configuration Register" (Register offset 0x08h, bits 0-3) as detailed on the datasheet either using an external configuration EEPROM or through an SMBus master.

    Any other unused configuration terminals on the device can be left floating as well and the internal PU/PD resistor will set the configuration to the default value.

    Regards,
    Jorge