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Peer - peer communication

Sai Jagini
Expert 1205 points
Other Parts Discussed in Thread: TRF7970A, CC2541, RF430CL330H, TIDM-NFC-P2P

HI,

Please can you share us the power consumption of TRF7970A during peer-peer communication mode.

When it is in active mode or passive mode with different data rates.


Please can you help us how to interface this one with CC2541  BLE device. In my application i want to pair my 2 BLE devices using NFC.

  • 0
    TI__Guru* 90906 points

    Sai - 

    when the TRF7970A is in passive target mode, the transmitter is off, so depending on the voltage into the part, you would have a look at Tables 6-3 or 6-4 in the TRF7970A to approximate the current draw of the device. http://www.ti.com/lit/ds/symlink/trf7970a.pdf (page 19)

    In active or passive initiator or active target, when the TX'er is on (depending on the mode here, as active P2P does require to turn off the TX'er when getting response from the other peer) you would apply same tables, but the last two rows in each, as it fits to what you want to do. 

    regarding interfacing to the CC2541, looks like it should be possible to use it as either version has plenty of flash and RAM, but you may want to ask how big the BLE stack is first before you settle on the smaller version of that part, as in my knowledge the BT stacks get pretty big, so double check that with ECS guys, then let us know how much room is left in flash and how much RAM is not allocated. 

  • 0 in reply to Josh Wyatt
    Expert 1205 points

    HI Josh,

    Thanks for prompt reply.

    I have one more question whether both RF430CL330H devices communicate with each other. It is proprietary product to pair both bluetooth devices CC2541. One will be in active and other will be in passive mode of operation.

    Kindly guide us accordingly how to proceed.

  • 0 in reply to Sai Jagini
    TI__Guru* 90906 points

    Sai - 

    the RF430CL330H is a tag, not a transceiver. Therefore its not possible to have them communicate with each other over the air. The best way to approach this is to use the TRF7970A, in P2P mode, with them switching between initiator and target, this is described and given as complete implementation (in standalone and GUI mode) here ==> http://www.ti.com/tool/TIDM-NFC-P2P