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TLK1211: Questions

Masanori Tachibana
Genius 5350 points
Part Number: TLK1211
Other Parts Discussed in Thread: TLK3134

Dear support team,

Our customer is evaluating TLK1211 now.
I got  the following questions from the customer.
So please give me some advice.

Questions:

1. In the table in page 12 of the datasheet, the following values are indicated in the parameter which is
   V(CM) Receiver input voltage requirement, VID = | RxP - RxN |.
      Min: 200mV
      Max: 1600 mV
   Is the above value not peak to peak but single phase amplitude?
   Is this understanding correct?

2. Could you teach the value that is output as JTAG ID code when boundary scan test is performed
   by connecting TLK1211 RCP to the JTAG chain?

Best regards,
M. Tachibana

  • 0
    TI__Genius 16150 points
    Hi Tachibana,

    This parameter refers to RX input differential peak-to-peak voltage.

    Regarding the JTAD ID code, please let me verify with the team. ASAP I will be back with the answer.

    Best Regards,
    Luis Omar Moran
    High Speed Interface
    SWAT Team
  • 0 in reply to Luis Omar Moran
    Genius 5350 points
    Dear Moran-san,

    Thank you for your prompt response.
    I understood the answer to Question 1.
    I'm waiting for your information regarding Question 2.

    Best regards,
    M. Tachibana
  • 0 in reply to Masanori Tachibana
    Genius 5350 points

    Dear Moran-san,

    Thank you for your support.
    But I'm sorry to hurry.

    How is the status of verification for Question 2?
    Sorry to trouble you, but could you just tell me the situation?

    Thank you.
    Best regards,
    M. Tachibana

  • 0 in reply to Masanori Tachibana
    TI__Genius 16150 points

    Hello Tachibana,

    Sorry for the delay.  I'm not sure what ID code used but here is the breakdown of the idcode (TLK3134 example)

     

            "0001"  &                -- Version Number

            "1011011110001101"  &    -- Part Number

            "00000010111"  &         -- Manufacturer ID

            "1";                     -- Required by IEEE Std. 1149.1-1990

     

    [0:31] -> version | part number | manufacturer ID | 1

     

    By reading out 32 bits value using JTAG IDCODE instruction, part number cann be decoded.

     

    Best Regards,

    Luis

    .

  • 0 in reply to Luis Omar Moran
    Genius 5350 points

    Dear Moran-san,

    Thank you for the information.
    I understood that the value of 32 bits output as JTAG ID code of TLK 1211 is the following.

    [0: 3]: Version number
    [4: 19]: Part number
    [20: 30]: Manufacturer ID
    [31]: Fixed 1 (Required by IEEE Std. 1149.1 - 1990)

    Is my understanding correct?
    And is this 32 bits data LSB first?

    Best regards,
    M. Tachibana

  • 0 in reply to Masanori Tachibana
    TI__Genius 16150 points
    Hello Tachibana,

    You are right. The concatenation is as you mentioned.

    Best Regards,
    Luis
  • 0 in reply to Luis Omar Moran
    Genius 5350 points
    Dear Moran-san,

    Thank you for your reply.
    I will inform the customer about it.

    Best regards,
    M. Tachibana
  • 0 in reply to Masanori Tachibana
    Genius 5350 points
    Dear Moran-san,

    I contacted the customer and received a further question.

    When the customer tried to read out JTAG ID code of TLK 1211, "Unknown JTAG ID" was returned and it could not be read out the JTAG ID code.
    Is it normal behavior that the JTAG ID code can not be read out?
    What is the expected value of JTAG ID code of TLK 1211?

    Thanks and best regards,
    M. Tachibana
  • 0 in reply to Masanori Tachibana
    Genius 5350 points
    Hello support team,

    I asked a question in addition last week, how is the confirmation situation?
    Our customer is waiting for answers to this question .
    Could you tell me the situation?

    Regards,
    M. Tachibana
  • 0 in reply to Masanori Tachibana
    TI__Genius 16150 points

    Hi Tachibana,

    Sorry for the confusion. The correct JTAG ID code order is (for TLK3134):

    [0] ==> "1"; -- Required by IEEE Std. 1149.1-1990
    [1:11] ==> "00000010111" & -- Manufacturer ID
    [12:27] ==> "1011011110001101" & -- Part Number
    [28:31] ==> "0001" & -- Version Number

    [31:0] -> version | part number | manufacturer ID | 1

    Please try this and let me know your results.

    Best Regards,
    Luis

  • 0 in reply to Luis Omar Moran
    Genius 5350 points

    Hello Moran-san,

    Thanks for your reply.

    I understood the expected value of JTAG ID code of TLK1211.
    However, as a result of the customer's confirmation, the value of JTAG ID code can not be read out and message "Unknown JTAG ID" いｓ returned.
    What causes are assumed to become Unknown?

    Best regards,
    M. Tachibana

  • 0 in reply to Luis Omar Moran
    Genius 5350 points

    Hello Moran-san,

    Thank you for your information.

    However, I am a bit confused about this information.
    I understand that the configuration of JTAG IDCODE consists of "[31:0] -> version | part number | manufacturer ID | 1".
    You mentioned that as follows.
      [0] ==> "1"; -- Required by IEEE Std. 1149.1-1990
      [1:11] ==> "00000010111" & -- Manufacturer ID
      [12:27] ==> "1011011110001101" & -- Part Number
      [28:31] ==> "0001" & -- Version Number
      [31:0] -> version | part number | manufacturer ID | 1

    For example, can I understand that "[1:11] ==> "00000010111" " means as follow?
      [1] ==> 1
      [2] ==> 1
      [3] ==> 1
      [4] ==> 0
      [5] ==> 1
      [6] ==> 0
      [7] ==> 0
      [8] ==> 0
      [9] ==> 0
      [10] ==> 0
      [11] ==> 0

    Or 
      [1] ==> 0
      [2] ==> 0
      [3] ==> 0
      [4] ==> 0
      [5] ==> 0
      [6] ==> 0
      [7] ==> 1
      [8] ==> 0
      [9] ==> 1
      [10] ==> 1
      [11] ==> 1

    Which is the correct understanding?

    One more question.
    As a result of the customer's confirmation, the value of JTAG IDCODE can not be read out and message "Unknown JTAG ID" is returned.
    What causes are assumed to become Unknown?

    Best regards,
    M. Tachibana

  • 0 in reply to Masanori Tachibana
    Genius 5350 points
    Dear support team,

    There has been no reply from anyone for a long time.
    How is this situation?

    Regards,
    M. Tachibana
  • 0 in reply to Masanori Tachibana
    TI__Genius 16150 points

    Sorry for the delayed response.

    In the picture above you can see an example of the order of bits for the ID Code, as you can see the order if from MSB to LSB. It's possible that customer is not using the correct ID code order for the bits and the device is not able to communicate with an "incorrect bit order".

    Best Regards,

    Luis 

  • 0 in reply to Luis Omar Moran
    Genius 5350 points

    Hello Luis-san,

    Thanks for your reply.

    Finally, please let me confirm to make sure.
    Is it correct with the following values, if they are expressed in hexadecimal notation?
     Version Number = 1 h
     Part Number = B78D h
     Manufacturer ID = 017 h
      Required by IEEE Std. = 1 h
    => JTAG IDCODE of TLK1211 [31: 0] = 1B 78 D0 2F h

    Is my recognition correct?

    Best regards,
    M. Tachibana