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DS110DF111: VCO Programming Values and Registers

Sean Iwasaki
Intellectual 390 points
Part Number: DS110DF111

Dear TI Staff:

Can you provide verify and/or recommend register setting for the VCO data rates listed below for the DS110DF111 and DS110DF125?

Are there any general guidance on the register settings for the the PPM Delta registers?  Recommendations vary 0xCC to 0xFF

REGISTER   DIVIDE                  VCO (GHz)               GROUP 0   GROUP 1    PPM DELTA

0x2F             RATIOS         GROUP 0    GROUP 1    0x60 0x61   0x62 0x63    0x64

-------------------------------------------------------------------------------------------------------------------

0x06            8    1              1.25000    10.31250        0x90 0xB3    0x90 0xB3      ?

0xE6           1    1               9.95328      9.95328        0xC4 0xB1    0xC4 0xB1     ?

0xE6           1    1               9.83040      9.83040        0x26 0xB1    0x26 0xB1      ?

0xE6           1    1          10.709225  10.709225        0x8B 0xB5    0x8B 0xB5     ?

0xE6           1    1          11.049107  11.049107        0x3E 0xB7    0x3E 0xB7      ?

0xE6           1    1          11.095730  11.095730        0x7A 0xB7    0x7A 0xB7      ?

0xE6           1    1         11.270089  11.270089         0x59 0xB8    0x59 0xB8      ?

0xE6           1    1         11.317642  11.317642         0x96 0xB8    0x96 0xB8      ?

0xE6           1    1           10.13760    10.13760            ?      ?            ?       ?          ?

0xE6           1    1           10.51875    10.51875         0xC4 0xB1   0xC4 0xB1      ?

  • 0
    TI__Mastermind 19135 points

    Hi,

    Please refer to the retimer 10G programming guide sections 3.9 and 3.10 for detailed instructions related to both Standard CDR rate configuration and manual CDR rate configuration (refer to the TI.com link below).

    https://www.ti.com/lit/an/snla323/snla323.pdf

    The TI SigCon Architect GUI may be used to sanity check your Manual CDR rate calculations for registers 0x60 through 0x63. For Register 0x64 (PPM tolerance) it is ok to use value of 0xFF for most cases.

    • Go to the TI SigCon Architect page to download both the GUI main installer plus 10G retimer GUI profiles
    • The user may then open the SigCon Architect GUI and run it in "Demo mode", and then perform the CDR manual rate calculations via the GUI "CDR tab". Refer to the EVM's user guide per link below for instructions (Section 3.1.2.4)

    Cordially,

    Rodrigo Natal

    HSSC Applications Engineer