• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 20 subscribers
  • Views 272 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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:

LMK61E2-125M: LMK61E2BBA

LMK61E2-125M: EEROM access malfunctioned

Mezbah Shaber
Prodigy 20 points
Part Number: LMK61E2-125M
Other Parts Discussed in Thread: LMK61E2

Hi Timothy,

Thanks for your advice. But unfortunately, we could not detect the LMK61 device after looking through all the i2c addresses.

 

Then, recently we experiment with another device and followed your tips, but without success. After programming the device to 200Mhz, we wrote

R49.6 = 1 Then, R49.0 = 1,

  • This results no update of frequency after power-cycling. (R48 did not increase)

Then I tied,

R49 = 0x03

  • Then we found that the I2C address changed (from 0x5a to 0x7e)

In the attached excel table, I tried to read all 73 registers during this operation.

 

I tried to recover the device multiple time, but without success. The device output-frequency was not available; possibly the device output buffer went to tristate!

 

Now, we have 2x LMK61e2 devices which went to some unknown states!lmk61e2 eeprom programming issue_2_ti.xlsx

  • 0
    TI__Mastermind 28550 points
    Hello Mezbah,

    This does sound like what you need to be doing according to 8.5.5.
    - Have you had any programming success?
    - Have you been able to program the device and then see updates to the output frequency without programming EEPROM? For this output to be in effect after programming you need to set SWR2PLL (R72.1) = 1.

    73,
    Timothy