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Original question:

is TL16C2552 DUAL UART supports 9-bit data interface or not?

TL16C2552: What are different points between TL16C2552 and PC16552?

Kazuya Nakai59
Guru 21595 points
Part Number: TL16C2552
Other Parts Discussed in Thread: TL16C552,

 Hello guys,

 One of my customers is using PC16552 for their current products. If they develop any next product, they want to keep using PC16552 because they don't want big system changing for development cost saving. Recently, we knew that PC16552 will be end of life soon by PCN from TI. Also we knew that the replacement product for PC16552 is TL16C552. But the PCN says "Same functionality and PIN-OUT as the compared device but is NOT an exact equivalent". They want to know what different points between TL16C2552 and PC16552 are? What is NOT an exact equivalent?

 Could you please tell me the different points? I want the information to keep the customer using TI interface products.

 Your reply would be much appreciated.
 Best regards,
 Kazuya Nakai.
 
  • 0
    TI__Guru 73171 points

    Hey Kazuya,

    The TL16C line up is our (TI's) pin to pin solution against what was National Semiconductor (before we bought them). I looked at both devices but did not see any thing besides the consumption current, which indicated a difference.

    If the customer uses the TL16C device in their system, they should be able to use it as a replacement. If they run into problems, we can work together (through e2e or offline) to help them debug the issue.

    -Bobby

  • 0 in reply to BOBBY
    Guru 21595 points
    Hello Bobby,

    Thank you very much for the prompt reply.
    I compared PC16552D and TL16C2552 datasheet roughly too. Then I found 2 resister bits of TL16C2552 are different as the following.

    Modem PC16552D TL16C2552
    Control Register(MCR)

    BIT3 Out2 --> INT Enable, OP Control
    BIT5 No Assigned --> Auto flow Control Enable (AFE)

    Which they should set "0" or "1" to these bits for same operation as PC16552D when the customer uses TL16C2552?

    Thank you very much againa and best regards,
    Kazuya Nakai.
  • 0 in reply to Kazuya Nakai59
    Guru 21595 points
    Hello Bobby,

    Could you please give me your reply?

    Thank you and best regards,
    Kazuya Nakai.
  • 0 in reply to Kazuya Nakai59
    TI__Guru 73171 points
    Hey Kazuya-san,

    Sorry, I didn'y see your additional question until your second reply.

    So if the customer is using the IER, then he will want to set MCR[3] high (or 1) to allow for the INT to properly toggle.
    MCR[5] can be either 0 or 1 depending on if they want to utilize the flow control feature. Leave to '0' if they do not want to use it.

    Thanks,
    -Bobby
  • 0 in reply to BOBBY
    Guru 21595 points
    Hello Bobby,

    Thank you for your reply. it's helpful for the customer and me.

    Best regards,
    Kazuya Nakai.