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TUSB2E221: Different I2C address

Koyo Asaishi
Intellectual 1980 points
Part Number: TUSB2E221

Tool/software:

Hello team,

Customer want to use two TUSB2E221 for laptop and desired I2C address is 0x4F and 0x47 (7bit format).

  • Can you support different address by using OTP? 0x47 isn't listed in the table 4-2 of the datasheet. Let me know if capable address is only table 4-2.
  • How and who do customer request it to? By when?
  • How do customer distinguish the devices? (TUSB2E2211001YCG is 0x4F and TUSB2E2211005YCG is 0x47, like this?)

Best regards
koyo

  • 0
    TI__Mastermind 38955 points

    Hi Koyo,

    Koyo Asaishi said:
    Can you support different address by using OTP? 0x47 isn't listed in the table 4-2 of the datasheet. Let me know if capable address is only table 4-2.

    I2C address is set via OTP settings and cannot be changed by the customer. The only I2C address we have available for this device is 0x4F.

    Koyo Asaishi said:
    How and who do customer request it to? By when?

    The customer will need to reach out to the marketing team for the BU to have a variant made that has an OTP with a different I2C address. However, if needed, it maybe be easier and faster to implement a mux instead, using that to path the SCL/SDA lanes to the desired mux when needed.

    Thanks,

    Ryan

  • 0 in reply to Ryan Kitto
    TI__Intellectual 1980 points

    Hi Ryan,

    Ryan Kitto said:
    I2C address is set via OTP settings and cannot be changed by the customer. The only I2C address we have available for this device is 0x4F.

    Do you mean customer can't use any I2C address except 0x4F? Datasheet in page28 describes I2C default target address can be changed at TI factory through OTP. But I'm not fully sure available address option.

    Ryan Kitto said:
    The customer will need to reach out to the marketing team for the BU to have a variant made that has an OTP with a different I2C address. However, if needed, it maybe be easier and faster to implement a mux instead, using that to path the SCL/SDA lanes to the desired mux when needed.

    I understand we should tell to your team if OTP change is required. Please share when we have to notify by and how we can distinguish the different OTP.
    Do you mean like below image? It will spend another cost and board space so this will not be an option.

    Best regards
    koyo

  • 0 in reply to Koyo Asaishi
    TI__Mastermind 38955 points

    Hi Koyo,

    Koyo Asaishi said:
    Do you mean customer can't use any I2C address except 0x4F? Datasheet in page28 describes I2C default target address can be changed at TI factory through OTP. But I'm not fully sure available address option.

    I just mean there is no way to set the I2C address except for through OTP, which would require creating a new variant of the device. We do not have any variants currently that support a different I2C address.

    Koyo Asaishi said:
    I understand we should tell to your team if OTP change is required. Please share when we have to notify by and how we can distinguish the different OTP.
    Do you mean like below image? It will spend another cost and board space so this will not be an option.

    Yes, that image is what I would imagine as the next best option.

    I'll reach out over Webex for details on who to contact.

    Thanks,

    Ryan