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CC2541 backwards compatiability with CC2500

INg
Genius 3475 points
Other Parts Discussed in Thread: CC2541, CC2500, CC2510

HI

 

I understand that CC2541 is backward compatiable with CC2500.

There is a setting in the RF studio for 250Kbps (cc2500 comaptiable) .

Would there be any impact on the compatiability if I manually change the data rate to 500Kbps after selecting "250Kbps (cc2500 comaptiable)" ?

BR

Ivan

  • 0
    TI__Guru 56590 points

    Hello Ivan,

    Yes, this should work.

    I tested it on a CC2510 ( a SoC with the same radio).

    Just remember to enable whitening on the CC2500 in SmartRFStudio as this is not enabled by default. The CC2541 has the PN9 whitener enabled in this setting in SmartRFStudio. Otherwise you will receive packets with CRC errors. Also make sure that you have the same frequency on both transmitter and receiver.

    BR. Eirik

  • 0 in reply to Eirik V
    Genius 3475 points

    Hi Erik

    Is FEC implemented in CC2541?

    My customer has deployed CC2500 as base station in his application with FEC enabled, there is no mentioned of FEC in CC2541, is there a way to implement FEC so that the two family can communicate?

    Ivan

  • 0 in reply to INg
    TI__Guru 56590 points

    Hello Ivan,

    No, FEC is not implemented in CC2541.

    It might be possible (not verified) do implement the algorithm in the CC2541 MCU.

    If you try to implement this, then you would have to manually control the CRC bytes and address byte as a part of the payload on the CC2541 to be able to process it with your custom FEC function. Before trying that the other parameters of the CC2500 radio setup should be verified to be compatible with the CC2541 in this link. A few examples is that the CC2500 must only use channels as close as possible to whole MHz (i.e. the frequency should be divisible by 1*10^6 without any remainder). And the modulation must off course match.

    If its possible I would recommend to disable the FEC on the CC2500 and run the link without.

    BR. Eirik