• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 21 subscribers
  • Views 288 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

CDCI6214: Registers

CDCI6214: Initialization and Calibration

Irmak Ece Sener Yalcin
Prodigy 70 points
Part Number: CDCI6214
Other Parts Discussed in Thread: LMX2594

Hello,

We are using CDCI6214 in Fallback mode. So if I understood correctly from the Figure 91 of the datasheet, during the initialization:

-We need to make sure that EXT_PLL_RESET_N kept low.

-After the reset is released, the control pins (and GENERIC0, GENERIC1, GENERIC2 and GENERIC3 registers) should be set.

-Then, the PLL0, PLL1, PLL2, PLL4 registers should be set.

-Then the STARTUP registers should be set.

The questions: What should we do for bypassing the VCO calibration and bypassing synchronization? How long does the calibration take? 

  • 0
    TI__Mastermind 18070 points

    Hello,

    The total initialization time can be 5ms (when powered up from the EEPROM). The VCO calibration cannot be bypassed. The best you can do is to store all the register settings in the EEPROM to save the I2C writing time.

    If you are looking for a much faster lock time then you can take a look at RF synthesizers such as LMX2594. That has partial/full assist for VCO calibration which can greatly reduce the lock time.

    Regards,
    Hao