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DS90UB948-Q1: IIC SCL disappear instantly

Daniel Wang (auto)
Expert 3455 points
Part Number: DS90UB948-Q1

Tool/software:

Hello team,

Customer found some issues about IIC, SCL will disappears intermittently when in 20Mbps coxial mode, pls check the excel file for details.

The registers are uploaded too, pls review and analyze the reason. Thanks.

TI problem analysis.xlsx

Regards,

Daniel Wang

  • 0
    TI__Mastermind 22690 points

    Hi Daniel,

    Could you tell us the frequency of this issue? How many boards were tested, and how many show this issue and how often does it occur? And is the issue always the same, that SCL is held low for 238 ms? This could indicate a BC watchdog timeout.

    Also, have the customer verified whether the capacitors, CMCs, etc on the main FPD-link are all functional? Is this on TI EVMs or custom boards? 

    - Ikram

  • 0 in reply to Ikram Haque
    Prodigy 60 points

    We tested three boards, and all had this problem. And just read it a few more times, and it will happen. The phenomenon of the problem is the same, for problem 1, the SCL is always lowered by 238ms when the host message is received for 20M, and for problem 2, the host reads back 257 bytes, the SCL is always lowered continuously and does not recover. We did the BC watchdog test, the value of 0x04 register is set to 0x0e, the phenomenon is shown in Figure 2, it does not seem to be a problem of BC watchdog.
    In addition, we verified several sets of FPD-link devices, and they all performed the same, so we can rule out a hardware problem in one device. serializer is on TI EVM, deserializer is on our screen.

    figure 1

    figure 2

    continental    Guo.Wang

  • 0 in reply to guo wang
    TI__Mastermind 22690 points

    Hi Guo,

    Could you send us the logs and label the issue seen? And could you also share the register map of the SER, to check whether I2C passthrough is enabled with Target ID and alias written for the MCU.

    Is this occasional or is there always an issue when writing to remote MCU from serializer side?
    And does this only occur with multi-byte read/write operations or single byte I2C transactions as well?


    Best regards,
    Ikram

  • 0 in reply to Ikram Haque
    Prodigy 60 points

    Hello, Ikram

       I put all the file in a zip file, you can know the files uses in readme file. 

       These problems occur all the time, and for problem 2, the decrease in the length of bytes read back by the host decreases the frequency of errors.

  • 0 in reply to guo wang
    Prodigy 60 points

    Hello, Ikram

       I put all the file in a zip file, you can know the files uses in readme file. 

       These problems occur all the time, and for problem 2, the decrease in the length of bytes read back by the host decreases the frequency of errors.

    the zip file can not upload in this web, which only 3.8M, and log file either, can you give me another communication way?

    Fullscreen ser coax 20 M.txt Download 
    [REGISTERS]
Device = ALP Nano 1 - DS90UH925, Connector 1
Comments = "coax 20M ser"
Date = 12/31/2024
Time = 09:57:33
Reg = 0,0x0000,0x18
Reg = 0,0x0001,0x00
Reg = 0,0x0003,0xDA
Reg = 0,0x0004,0x80
Reg = 0,0x0005,0x00
Reg = 0,0x0006,0x58
Reg = 0,0x0007,0xA0
Reg = 0,0x0008,0xB0
Reg = 0,0x000A,0xF7
Reg = 0,0x000B,0x01
Reg = 0,0x000C,0x13
Reg = 0,0x000D,0x20
Reg = 0,0x000E,0x00
Reg = 0,0x000F,0x00
Reg = 0,0x0010,0x00
Reg = 0,0x0011,0x00
Reg = 0,0x0012,0x00
Reg = 0,0x0013,0x88
Reg = 0,0x0014,0x00
Reg = 0,0x0015,0x01
Reg = 0,0x0016,0xFE
Reg = 0,0x0017,0xDE
Reg = 0,0x0018,0x7F
Reg = 0,0x0019,0x7F
Reg = 0,0x0022,0x25
Reg = 0,0x0023,0x00
Reg = 0,0x0024,0x00
Reg = 0,0x0025,0x00
Reg = 0,0x0026,0x00
Reg = 0,0x0027,0x00
Reg = 0,0x0028,0x01
Reg = 0,0x0029,0x20
Reg = 0,0x002A,0x20
Reg = 0,0x002B,0xB0
Reg = 0,0x002C,0x00
Reg = 0,0x0030,0x00
Reg = 0,0x0031,0x00
Reg = 0,0x0032,0x00
Reg = 0,0x0033,0x00
Reg = 0,0x0034,0x00
Reg = 0,0x0035,0x00
Reg = 0,0x0036,0x00
Reg = 0,0x0037,0x00
Reg = 0,0x0038,0x00
Reg = 0,0x0039,0x00
Reg = 0,0x003A,0x00
Reg = 0,0x003B,0x00
Reg = 0,0x003C,0x00
Reg = 0,0x003D,0x00
Reg = 0,0x003E,0x00
Reg = 0,0x003F,0x00
Reg = 0,0x0040,0x14
Reg = 0,0x0041,0x5C
Reg = 0,0x0042,0x00
Reg = 0,0x0050,0x37
Reg = 0,0x0064,0x05
Reg = 0,0x0065,0x04
Reg = 0,0x0066,0x03
Reg = 0,0x0067,0x03
Reg = 0,0x0068,0x30
Reg = 0,0x0069,0x00
Reg = 0,0x0080,0x00
Reg = 0,0x0081,0x00
Reg = 0,0x0082,0x00
Reg = 0,0x0083,0x00
Reg = 0,0x0084,0x00
Reg = 0,0x0090,0x00
Reg = 0,0x0091,0x00
Reg = 0,0x0092,0x00
Reg = 0,0x0093,0x00
Reg = 0,0x0094,0x00
Reg = 0,0x0098,0x00
Reg = 0,0x0099,0x00
Reg = 0,0x009A,0x00
Reg = 0,0x009B,0x00
Reg = 0,0x009C,0x00
Reg = 0,0x009D,0x00
Reg = 0,0x009E,0x00
Reg = 0,0x009F,0x00
Reg = 0,0x00A0,0x00
Reg = 0,0x00A1,0x00
Reg = 0,0x00A2,0x00
Reg = 0,0x00A3,0x00
Reg = 0,0x00C0,0x00
Reg = 0,0x00C1,0x00
Reg = 0,0x00C2,0xA8
Reg = 0,0x00C3,0x00
Reg = 0,0x00C4,0x48
Reg = 0,0x00C5,0x00
Reg = 0,0x00C6,0x21
Reg = 0,0x00C7,0x61
Reg = 0,0x00C8,0xC0
Reg = 0,0x00C9,0x00
Reg = 0,0x00CA,0x00
Reg = 0,0x00CB,0x00
Reg = 0,0x00CC,0x00
Reg = 0,0x00D0,0x00
Reg = 0,0x00D1,0x00
Reg = 0,0x00D2,0x00
Reg = 0,0x00D3,0x00
Reg = 0,0x00F0,0x5F
Reg = 0,0x00F1,0x55
Reg = 0,0x00F2,0x42
Reg = 0,0x00F3,0x39
Reg = 0,0x00F4,0x34
Reg = 0,0x00F5,0x39
Reg = 0,0x00F6,0x00
Reg = 0,0x00F8,0x00
Reg = 0,0x00F9,0x00

  • 0 in reply to guo wang
    TI__Mastermind 22690 points

    Hello, could you please accept my request and I can send you my email to send us these files.

    Thank you,
    Ikram

  • 0 in reply to Ikram Haque
    Prodigy 60 points

    OK，but I don't recieve any request yet. What the format of the request?

  • 0 in reply to guo wang
    Prodigy 60 points

    Hello, Ikram

    this is my email, you can send email directly.

  • 0 in reply to guo wang
    TI__Mastermind 22690 points

    Hi Guo, I sent you an email for sharing the files.

    Best regards,
    Ikram

  • 0 in reply to Ikram Haque
    TI__Mastermind 22690 points

    Hi Daniel and Guo,

    I noticed that the mode straps are not set for coax mode on the SER or DES.

    - DES MODE_SEL register 0x37 = 0xAA (which indicates 20 Mbps/STP)

    - SER MODE_SEL1 register 0x13 = 0x88, (indicates STP)

    - DES RX_MODE_STATUS 0x23 = 0x18 (** this register does indicate 20 Mbps and coax mode. Was this manually overwritten?)

    - SER register 0x5B was not shared. Please check the value of this register


    Could you please check the hardware on the board:

    - what AC- coupling capacitor values are used on 949 and 948?
    - does the -ve FPD-Link trace have termination, as required for coax mode?
    - what is the MODE_SEL set to? If possible please change the switches on the the TI EVM, and resistor values on 948 display to the correct mode strap.
    - are there other components in the FPD-Link line? Is there any adapters used on the cable?

    Also, just to check, could you share the I2C remote ID and Alias written to the SER to enable writing to the MCU? The register dump of the SER-DES was not complete with all registers. Or please share that portion of the script.

    Is this issue only seen with multi-byte read/write operations or also with single W/R transactions?

    Best regards,
    Ikram

  • 0 in reply to Ikram Haque
    Prodigy 60 points

    Hello, Ikram and Daniel,

    I have a question, if DES RX_MODE_STATUS 0x23 = 0x18,and DES MODE_SEL register 0x37 = 0xAA, dose it work for coax 20M mode.

    1.for question "- what AC- coupling capacitor values are used on 949 and 948?
    - does the -ve FPD-Link trace have termination, as required for coax mode?"

    we rework TI EVM as follow figure

    2.for question "- what is the MODE_SEL set to? If possible please change the switches on the the TI EVM, and resistor values on 948 display to the correct mode strap."

    we change the resistor for correct

    3.for question "- are there other components in the FPD-Link line? Is there any adapters used on the cable?"

    we don't have other components. And there is no other adapters. we communiction line as blew

    4. for question "Is this issue only seen with multi-byte read/write operations or also with single W/R transactions?"

    this issue seen with with multi-byte read/write operations

    5.for question "could you share the I2C remote ID and Alias written to the SER to enable writing to the MCU? The register dump of the SER-DES was not complete with all registers. Or please share that portion of the script."

    the remote ID is 0x20. and complete register dump are as follows

    Fullscreen 0601.ser coax 20 M.txt Download 
    [REGISTERS]
Device = ALP Nano 1 - DS90UH925, Connector 1
Comments = "coax 20M ser"
Date = 12/31/2024
Time = 09:57:33
Reg = 0,0x0000,0x18
Reg = 0,0x0001,0x00
Reg = 0,0x0003,0xDA
Reg = 0,0x0004,0x80
Reg = 0,0x0005,0x00
Reg = 0,0x0006,0x58
Reg = 0,0x0007,0xA0
Reg = 0,0x0008,0xB0
Reg = 0,0x000A,0xF7
Reg = 0,0x000B,0x01
Reg = 0,0x000C,0x13
Reg = 0,0x000D,0x20
Reg = 0,0x000E,0x00
Reg = 0,0x000F,0x00
Reg = 0,0x0010,0x00
Reg = 0,0x0011,0x00
Reg = 0,0x0012,0x00
Reg = 0,0x0013,0x88
Reg = 0,0x0014,0x00
Reg = 0,0x0015,0x01
Reg = 0,0x0016,0xFE
Reg = 0,0x0017,0xDE
Reg = 0,0x0018,0x7F
Reg = 0,0x0019,0x7F
Reg = 0,0x0022,0x25
Reg = 0,0x0023,0x00
Reg = 0,0x0024,0x00
Reg = 0,0x0025,0x00
Reg = 0,0x0026,0x00
Reg = 0,0x0027,0x00
Reg = 0,0x0028,0x01
Reg = 0,0x0029,0x20
Reg = 0,0x002A,0x20
Reg = 0,0x002B,0xB0
Reg = 0,0x002C,0x00
Reg = 0,0x002D,0x00
Reg = 0,0x002E,0xA5
Reg = 0,0x002F,0x5A
Reg = 0,0x0030,0x00
Reg = 0,0x0031,0x00
Reg = 0,0x0032,0x00
Reg = 0,0x0033,0x00
Reg = 0,0x0034,0x00
Reg = 0,0x0035,0x00
Reg = 0,0x0036,0x00
Reg = 0,0x0037,0x00
Reg = 0,0x0038,0x00
Reg = 0,0x0039,0x00
Reg = 0,0x003A,0x00
Reg = 0,0x003B,0x00
Reg = 0,0x003C,0x00
Reg = 0,0x003D,0x00
Reg = 0,0x003E,0x00
Reg = 0,0x003F,0x00
Reg = 0,0x0040,0x14
Reg = 0,0x0041,0x5C
Reg = 0,0x0042,0x00
Reg = 0,0x0043,0x00
Reg = 0,0x0044,0x80
Reg = 0,0x0045,0x00
Reg = 0,0x0046,0x00
Reg = 0,0x0047,0x00
Reg = 0,0x0048,0x00
Reg = 0,0x0049,0x00
Reg = 0,0x004A,0x00
Reg = 0,0x004B,0x00
Reg = 0,0x004C,0x00
Reg = 0,0x004D,0x00
Reg = 0,0x004E,0x00
Reg = 0,0x004F,0x00
Reg = 0,0x0050,0x37
Reg = 0,0x0051,0xA1
Reg = 0,0x0052,0x1E
Reg = 0,0x0053,0x00
Reg = 0,0x0054,0x28
Reg = 0,0x0055,0x0C
Reg = 0,0x0056,0x00
Reg = 0,0x0057,0x00
Reg = 0,0x0058,0x00
Reg = 0,0x0059,0x00
Reg = 0,0x005A,0xD1
Reg = 0,0x005B,0x21
Reg = 0,0x005C,0x02
Reg = 0,0x005D,0x06
Reg = 0,0x005E,0x44
Reg = 0,0x005F,0x60
Reg = 0,0x0060,0x22
Reg = 0,0x0061,0x02
Reg = 0,0x0062,0x00
Reg = 0,0x0063,0x00
Reg = 0,0x0064,0x05
Reg = 0,0x0065,0x04
Reg = 0,0x0066,0x03
Reg = 0,0x0067,0x03
Reg = 0,0x0068,0x30
Reg = 0,0x0069,0x00
Reg = 0,0x006A,0x00
Reg = 0,0x006B,0x00
Reg = 0,0x006C,0x00
Reg = 0,0x006D,0x00
Reg = 0,0x006E,0x00
Reg = 0,0x006F,0x00
Reg = 0,0x0070,0x00
Reg = 0,0x0071,0x00
Reg = 0,0x0072,0x00
Reg = 0,0x0073,0x00
Reg = 0,0x0074,0x00
Reg = 0,0x0075,0x00
Reg = 0,0x0076,0x00
Reg = 0,0x0077,0x00
Reg = 0,0x0078,0x00
Reg = 0,0x0079,0x00
Reg = 0,0x007A,0x00
Reg = 0,0x007B,0x00
Reg = 0,0x007C,0x00
Reg = 0,0x007D,0x00
Reg = 0,0x007E,0x00
Reg = 0,0x007F,0x00
Reg = 0,0x0080,0x00
Reg = 0,0x0081,0x00
Reg = 0,0x0082,0x00
Reg = 0,0x0083,0x00
Reg = 0,0x0084,0x00
Reg = 0,0x0085,0x00
Reg = 0,0x0086,0x00
Reg = 0,0x0087,0x00
Reg = 0,0x0088,0x00
Reg = 0,0x0089,0x00
Reg = 0,0x008A,0x00
Reg = 0,0x008B,0x00
Reg = 0,0x008C,0x00
Reg = 0,0x008D,0x00
Reg = 0,0x008E,0x00
Reg = 0,0x008F,0x00
Reg = 0,0x0090,0x00
Reg = 0,0x0091,0x00
Reg = 0,0x0092,0x00
Reg = 0,0x0093,0x00
Reg = 0,0x0094,0x00
Reg = 0,0x0095,0x00
Reg = 0,0x0096,0x00
Reg = 0,0x0097,0x00
Reg = 0,0x0098,0x00
Reg = 0,0x0099,0x00
Reg = 0,0x009A,0x00
Reg = 0,0x009B,0x00
Reg = 0,0x009C,0x00
Reg = 0,0x009D,0x00
Reg = 0,0x009E,0x00
Reg = 0,0x009F,0x00
Reg = 0,0x00A0,0x00
Reg = 0,0x00A1,0x00
Reg = 0,0x00A2,0x00
Reg = 0,0x00A3,0x00
Reg = 0,0x00A4,0x00
Reg = 0,0x00A5,0x00
Reg = 0,0x00A6,0x00
Reg = 0,0x00A7,0x00
Reg = 0,0x00A8,0x00
Reg = 0,0x00A9,0x00
Reg = 0,0x00AA,0x00
Reg = 0,0x00AB,0x00
Reg = 0,0x00AC,0x00
Reg = 0,0x00AD,0x00
Reg = 0,0x00AE,0x00
Reg = 0,0x00AF,0x00
Reg = 0,0x00B0,0x00
Reg = 0,0x00B1,0x00
Reg = 0,0x00B2,0x00
Reg = 0,0x00B3,0x00
Reg = 0,0x00B4,0x00
Reg = 0,0x00B5,0x00
Reg = 0,0x00B6,0x00
Reg = 0,0x00B7,0x00
Reg = 0,0x00B8,0x00
Reg = 0,0x00B9,0x00
Reg = 0,0x00BA,0x00
Reg = 0,0x00BB,0x00
Reg = 0,0x00BC,0x00
Reg = 0,0x00BD,0x00
Reg = 0,0x00BE,0x00
Reg = 0,0x00BF,0x00
Reg = 0,0x00C0,0x00
Reg = 0,0x00C1,0x00
Reg = 0,0x00C2,0xA8
Reg = 0,0x00C3,0x00
Reg = 0,0x00C4,0x48
Reg = 0,0x00C5,0x00
Reg = 0,0x00C6,0x21
Reg = 0,0x00C7,0x61
Reg = 0,0x00C8,0xC0
Reg = 0,0x00C9,0x00
Reg = 0,0x00CA,0x00
Reg = 0,0x00CB,0x00
Reg = 0,0x00CC,0x00
Reg = 0,0x00CD,0x00
Reg = 0,0x00CE,0xFF
Reg = 0,0x00CF,0x00
Reg = 0,0x00D0,0x00
Reg = 0,0x00D1,0x00
Reg = 0,0x00D2,0x00
Reg = 0,0x00D3,0x00
Reg = 0,0x00D4,0x00
Reg = 0,0x00D5,0x00
Reg = 0,0x00D6,0x00
Reg = 0,0x00D7,0x00
Reg = 0,0x00D8,0x00
Reg = 0,0x00D9,0x00
Reg = 0,0x00DA,0x00
Reg = 0,0x00DB,0x00
Reg = 0,0x00DC,0x00
Reg = 0,0x00DD,0x00
Reg = 0,0x00DE,0x00
Reg = 0,0x00DF,0x00
Reg = 0,0x00E0,0x00
Reg = 0,0x00E1,0x00
Reg = 0,0x00E2,0xA8
Reg = 0,0x00E3,0x00
Reg = 0,0x00E4,0x68
Reg = 0,0x00E5,0x38
Reg = 0,0x00E6,0x21
Reg = 0,0x00E7,0x00
Reg = 0,0x00E8,0x00
Reg = 0,0x00E9,0x00
Reg = 0,0x00EA,0x00
Reg = 0,0x00EB,0x00
Reg = 0,0x00EC,0x00
Reg = 0,0x00ED,0x00
Reg = 0,0x00EE,0x00
Reg = 0,0x00EF,0x00
Reg = 0,0x00F0,0x5F
Reg = 0,0x00F1,0x55
Reg = 0,0x00F2,0x42
Reg = 0,0x00F3,0x39
Reg = 0,0x00F4,0x34
Reg = 0,0x00F5,0x39
Reg = 0,0x00F6,0x00
Reg = 0,0x00F8,0x00
Reg = 0,0x00F9,0x00
Reg = 0,0x00FA,0x00
Reg = 0,0x00FB,0x00
Reg = 0,0x00FC,0x00
Reg = 0,0x00FD,0x00
Reg = 0,0x00FE,0x00
Reg = 0,0x00FF,0x00
    Fullscreen deser coax 20M.nrd.txt Download 
    [REGISTERS]
Device = ALP Nano 1 - DS90UB948, Connector 1
Comments = "coax 20M"
Date = 12/19/2024
Time = 17:06:22
Reg = 0,0x0000,0x58
Reg = 0,0x0001,0x04
Reg = 0,0x0002,0x00
Reg = 0,0x0003,0xF0
Reg = 0,0x0004,0xFE
Reg = 0,0x0005,0x1E
Reg = 0,0x0006,0x00
Reg = 0,0x0007,0x18
Reg = 0,0x0008,0x00
Reg = 0,0x0009,0x00
Reg = 0,0x000A,0x00
Reg = 0,0x000B,0x00
Reg = 0,0x000C,0x00
Reg = 0,0x000D,0x00
Reg = 0,0x000E,0x00
Reg = 0,0x000F,0x00
Reg = 0,0x0010,0x00
Reg = 0,0x0011,0x00
Reg = 0,0x0012,0x00
Reg = 0,0x0013,0x00
Reg = 0,0x0014,0x00
Reg = 0,0x0015,0x00
Reg = 0,0x0016,0x00
Reg = 0,0x0017,0x00
Reg = 0,0x0018,0x00
Reg = 0,0x0019,0x01
Reg = 0,0x001A,0x00
Reg = 0,0x001B,0xF7
Reg = 0,0x001C,0x2B
Reg = 0,0x001D,0x10
Reg = 0,0x001E,0x00
Reg = 0,0x001F,0x00
Reg = 0,0x0020,0x00
Reg = 0,0x0021,0x00
Reg = 0,0x0022,0x40
Reg = 0,0x0023,0x18
Reg = 0,0x0024,0x08
Reg = 0,0x0025,0x00
Reg = 0,0x0026,0x19
Reg = 0,0x0027,0x19
Reg = 0,0x0028,0x01
Reg = 0,0x0029,0x00
Reg = 0,0x002A,0x00
Reg = 0,0x002B,0x00
Reg = 0,0x002C,0x00
Reg = 0,0x002D,0x00
Reg = 0,0x002E,0x00
Reg = 0,0x002F,0x00
Reg = 0,0x0030,0x00
Reg = 0,0x0031,0x00
Reg = 0,0x0032,0x90
Reg = 0,0x0033,0x25
Reg = 0,0x0034,0x11
Reg = 0,0x0035,0x00
Reg = 0,0x0036,0x00
Reg = 0,0x0037,0xAA
Reg = 0,0x0038,0x00
Reg = 0,0x0039,0x00
Reg = 0,0x003A,0x00
Reg = 0,0x003B,0x00
Reg = 0,0x003C,0x20
Reg = 0,0x003D,0xE0
Reg = 0,0x003E,0x23
Reg = 0,0x003F,0x00
Reg = 0,0x0040,0x43
Reg = 0,0x0041,0x11
Reg = 0,0x0042,0x03
Reg = 0,0x0043,0x00
Reg = 0,0x0044,0x60
Reg = 0,0x0045,0x88
Reg = 0,0x0046,0x00
Reg = 0,0x0047,0x00
Reg = 0,0x0048,0x0F
Reg = 0,0x0049,0x60
Reg = 0,0x004A,0x00
Reg = 0,0x004B,0x00
Reg = 0,0x004C,0x00
Reg = 0,0x004D,0x00
Reg = 0,0x004E,0x63
Reg = 0,0x004F,0x00
Reg = 0,0x0050,0x03
Reg = 0,0x0051,0x10
Reg = 0,0x0052,0x00
Reg = 0,0x0053,0x01
Reg = 0,0x0054,0x80
Reg = 0,0x0055,0x00
Reg = 0,0x0056,0x00
Reg = 0,0x0057,0x00
Reg = 0,0x0058,0x00
Reg = 0,0x0059,0x7F
Reg = 0,0x005A,0x20
Reg = 0,0x005B,0x20
Reg = 0,0x005C,0x00
Reg = 0,0x005D,0x00
Reg = 0,0x005E,0x00
Reg = 0,0x005F,0x00
Reg = 0,0x0060,0x00
Reg = 0,0x0061,0x00
Reg = 0,0x0062,0x00
Reg = 0,0x0063,0x00
Reg = 0,0x0064,0x10
Reg = 0,0x0065,0x00
Reg = 0,0x0066,0x00
Reg = 0,0x0067,0x00
Reg = 0,0x0068,0x00
Reg = 0,0x0069,0x00
Reg = 0,0x006E,0x00
Reg = 0,0x006F,0x00
Reg = 0,0x0070,0x00
Reg = 0,0x0071,0x00
Reg = 0,0x0072,0x00
Reg = 0,0x0073,0x07
Reg = 0,0x0074,0x07
Reg = 0,0x0075,0x08
Reg = 0,0x0076,0x00
Reg = 0,0x0077,0x00
Reg = 0,0x0078,0x00
Reg = 0,0x0079,0x00
Reg = 0,0x007A,0x00
Reg = 0,0x007B,0x5D
Reg = 0,0x007C,0x02
Reg = 0,0x007D,0x00
Reg = 0,0x007E,0x00
Reg = 0,0x007F,0x00
Reg = 0,0x0080,0x00
Reg = 0,0x0081,0x00
Reg = 0,0x0082,0x00
Reg = 0,0x0083,0x00
Reg = 0,0x0084,0x00
Reg = 0,0x0085,0x00
Reg = 0,0x0086,0x00
Reg = 0,0x0087,0x00
Reg = 0,0x0088,0x00
Reg = 0,0x0089,0x00
Reg = 0,0x008A,0x00
Reg = 0,0x008B,0x00
Reg = 0,0x008C,0x00
Reg = 0,0x008D,0x00
Reg = 0,0x008E,0x00
Reg = 0,0x008F,0x00
Reg = 0,0x0090,0x00
Reg = 0,0x0091,0x00
Reg = 0,0x0092,0x00
Reg = 0,0x0093,0x00
Reg = 0,0x0094,0x00
Reg = 0,0x0095,0x00
Reg = 0,0x0096,0x00
Reg = 0,0x0097,0x00
Reg = 0,0x0098,0x00
Reg = 0,0x0099,0x00
Reg = 0,0x009A,0x00
Reg = 0,0x009B,0x00
Reg = 0,0x009C,0x00
Reg = 0,0x009D,0x00
Reg = 0,0x009E,0x00
Reg = 0,0x009F,0x00
Reg = 0,0x00A0,0x00
Reg = 0,0x00A1,0x00
Reg = 0,0x00A2,0x84
Reg = 0,0x00A3,0x00
Reg = 0,0x00A4,0x00
Reg = 0,0x00A5,0x00
Reg = 0,0x00A6,0x00
Reg = 0,0x00A7,0x00
Reg = 0,0x00A8,0x00
Reg = 0,0x00A9,0x00
Reg = 0,0x00AA,0x00
Reg = 0,0x00AB,0x00
Reg = 0,0x00AC,0x00
Reg = 0,0x00AD,0x00
Reg = 0,0x00AE,0x00
Reg = 0,0x00AF,0x00
Reg = 0,0x00B0,0x00
Reg = 0,0x00B1,0x00
Reg = 0,0x00B2,0x00
Reg = 0,0x00B3,0x00
Reg = 0,0x00B4,0x00
Reg = 0,0x00B5,0x00
Reg = 0,0x00B6,0x00
Reg = 0,0x00B7,0x00
Reg = 0,0x00B8,0x00
Reg = 0,0x00B9,0x00
Reg = 0,0x00BA,0x00
Reg = 0,0x00BB,0x00
Reg = 0,0x00BC,0x00
Reg = 0,0x00BD,0x00
Reg = 0,0x00BE,0x00
Reg = 0,0x00BF,0x00
Reg = 0,0x00C0,0x00
Reg = 0,0x00C1,0x00
Reg = 0,0x00C3,0x00
Reg = 0,0x00C4,0x00
Reg = 0,0x00C5,0x00
Reg = 0,0x00C8,0xC0
Reg = 0,0x00C9,0x00
Reg = 0,0x00CA,0x00
Reg = 0,0x00CB,0x00
Reg = 0,0x00CC,0x00
Reg = 0,0x00CD,0x00
Reg = 0,0x00CE,0x00
Reg = 0,0x00CF,0x00
Reg = 0,0x00E0,0x00
Reg = 0,0x00E1,0x00
Reg = 0,0x00E2,0x00
Reg = 0,0x00E3,0x00
Reg = 0,0x00E4,0x00
Reg = 0,0x00E5,0x00
Reg = 0,0x00E6,0x00
Reg = 0,0x00E7,0x00
Reg = 0,0x00E8,0x00
Reg = 0,0x00E9,0x00
Reg = 0,0x00EA,0x00
Reg = 0,0x00EB,0x00
Reg = 0,0x00EC,0x00
Reg = 0,0x00ED,0x00
Reg = 0,0x00EE,0x00
Reg = 0,0x00EF,0x00
Reg = 0,0x00F0,0x5F
Reg = 0,0x00F1,0x55
Reg = 0,0x00F2,0x42
Reg = 0,0x00F3,0x39
Reg = 0,0x00F4,0x34
Reg = 0,0x00F5,0x38
Reg = 0,0x00F6,0x00
Reg = 0,0x00F8,0x00
Reg = 0,0x00F9,0x00
Reg = 0,0x00FA,0x00
Reg = 0,0x00FB,0x00
Reg = 0,0x00FC,0x00
Reg = 0,0x00FD,0x00
Reg = 0,0x00FE,0x00
Reg = 0,0x00FF,0x00

    Best regards,
    Guo.Wang

  • 0 in reply to guo wang
    TI__Mastermind 22690 points

    Hi Guo Wang,

    Based on the meeting today, please check the MODE_SEL straps by verifying resistor divider values, and please both the rework and schematic for both 949 EVM and 948 display side. Also, could you share the current cable used? Is it SMA end-to-end? If possible, let us know if shorter, or better bandwidth cable improves this.

    I will check the rework needed for coax on the TI EVM and get back to you. I will also discuss with the team whether placing the SMA in place of the connector would be okay in terms of signal integrity.

    Best regards,
    Ikram