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LMX1204: Register cannot be written

Part Number: LMX1204

Tool/software:

Dear Texas Instruments staff,

When using LMX1204, I found that when I configured the R9 register to E004, it actually read E002, and the register value could not be reconfigured.

When using the single board, I configured the LMX1204 as follows:

Unset SYSREFREQ_SPI

Set SYNC mode, SYNC_EN, CLR=1, CLR=0, and finally set SYSREFREQ_SPI.

Then read the R9 register and found that it did not match the set value.

After trying to write this register and then read it, it was still the previous value.