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Issue with CC1125 SPI Interface

Other Parts Discussed in Thread: CC1125

Hello,

I am connecting CC1125 ("TrxEB) with AVR-ATXMEGA128 Microcontroller through SPI. First I ported the easy link application provided by TI with modifications in SPI interface. I am planning to communicate this CC1125 device to another connected with RF studio at 154MHZ. I change the register configuration file as it required to be change for 154MHZ.

Now when after reset I am reading all the register values over SPI I am getting mostly 0x0f values with some 0x00. This pattern of read values always remains same. When I go for writing all the registers than return status byte is 0x0f in most the cases with some 0x00. Again in same pattern. Additionally some times it stuck with 0x6f in both read and write operations.

I am very confused. I thought it may be the issue with SPI. But I double check all the SPI mechanisms including waveforms on CRO and it seems normal.

Please provide feedback...