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CC1200EMK-868-930: Not able to write to CC1200 register space

Deepa Gopinath65
Prodigy 70 points
Part Number: CC1200EMK-868-930
Other Parts Discussed in Thread: CC1200

Hi,

We are interfacing CC1200 with different MCU as SPI Master. We are able to read data from register space and extended register space. But we are not able to write data to register space.

 Please find the SPI write sequence to write data 0x9 to the register address 0x00 as defined here

SPI Write sequence - 0x00 0x06 

SPI Read sequence - 0x80 0xAA

 

Please find the SPI Analyzer data sequence 

Thanks in Advance. Request your inputs and help to fix the issue at the earliest

 

Thanks & Regards,

Deepa

  • 0
    TI__Guru* 79421 points

    I am not sure what the problem is, as I am not able to recreate it:

    My results are the same if changing the dummy byte from 0x00 to 0xAA as you have done.

    Is this happening on several boards or just one?

    Have you made sure that your SPI is according to spec. when it comes to rise times, hold times etc?

    Are you doing a proper reset before starting to access the registers?

    Is it only register 0x00 you have problems with? 0x01 seems OK from your plots?

    Siri