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CC2533 EVM: SPI I/F

Other Parts Discussed in Thread: REMOTI, CC2533, LM3S6911
Hi,

My customer has a CC2533 based RemoTI  RF Evaluation module. 
This module gives SPI interface on its external header using which one can connect it to other boards.

But if you go by documentation then besides standard SPI signals, EVM module  also needs SRDY
and MRDY signals. The referenced document is RemoTI Network Processor Interface Spec (SWRA271).

But these two signals are not there on the headers, which are there on the RF EVM module. 

They have LM3S6911 based custom H/W which has got standard SPI/SSI interface.
They are trying to control RF EVM using LM3S6911 H/W over SPI interface, but because
RF EVM do not provide those two signals they are not able to control it.

Can you please suggest how can we go about and  control RF  EVM using LM3S6911 H/W. 

Do SRDY and MRDY are necessary or we can get rid of those two signals and still  control 
RF EVM?

Thanks
Sum.
  • Hi GardenGreenSum,

    SRDY and MRDY signals are needed, you can't use SPI interface without them.

    In the default SPI interface configuration available using RF4CE RNP NWK, they are mapped to GPIOs, namely on P0.3 (MRDY, input to CC253x) and P0.4 (SRDY, output from CC253x). Those lines are available respectively on the EVM headers, namely P1.9 and P1.3 of the CC253x EVM interface headers. Please use those lines to connect MRDY and SRDY signals coming out of host GPIOs (please note MRDY MUST be different from SPI SS at the input of CC253x but can be the same line coming out of host). 

    Are you talking about this EVM or the target board? Now on RemoTI target board (which is used to convert USB-to-serial) SPI interface is also available as well as P0.3 and P0.4 (namely UART Tx and UART-CTS on J4 interface).

     

    I hope this helps.

    Thanks,

    TheDarkSide