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TCAN1042DEVM: Si part no. for 5mbps CAN datarate for TCAN1042EVM

Shreenidhi Bhat
Prodigy 10 points
Part Number: TCAN1042DEVM
Other Parts Discussed in Thread: TCAN1044A-Q1, TCAN1042G-Q1, TCAN1042GV-Q1

Hi,

I have a TCAN1042EVM but it has TCAN1042Q1 which supports a max CANFD bitrate of 2Mbps.

My requirement is 5Mbps CANFD datarate. And this is offered by the TCAN1042G device. Can I get a silicon part no. of TCAN which i can use/replace on TCAN1042DEVM Si (which mean new Si should be pin compatible with factory installed TCAN1042 device)? (link of same would help)

Also, please help me with settings of jumpers i need to change/update to get 5mbps on this EVM board.

Current jumper settings :

I am providing 5V at Vcc.

JMP6 is disconnected and a 3.3 V is given to pin P5.

JMP1 is connected to PD

JMP5 is open

JMP4 is connected

Both the Jumper 4 and 5 are to be connected to give 60ohm impedance between CANH and CANL.

Thanks,

Shree

  • +1
    TI__Guru 66962 points

    Shreenidhi,

    The jumper settings can stay the same on the EVM for 5Mbps operation. To procure a TCAN1042G-Q1, I'd recommend going to TI.com or a distributor to find devices. You can also use the TCAN1044A-Q1 which has the same pinout and function, but able to communicate up to 8Mbps. Please let us know if you have any other questions.

    Regards,

    Eric Hackett

  • 0 in reply to Eric Hackett
    TI__Prodigy 120 points

    Hi ,

    FPGA is sending TX/RX at 3.3V level.

    Looking at DS of TCAN1042G-Q1, it seems like it will send TX/RX at VCC level. As per above (original post) device supply settings, VCC is at 5V. 

    In this case same jumper/device-supply settings will not work with TCAN1042G-Q1, right? (Or did I miss anything)?

    I believe, If we need to use TCAN1042G-Q1, then 

    1- VCC should be provided at 3.3V (so it matches FPGA TX/Rx voltage levels, right?

    2- as P5 is NC on TCAN1042G-Q1, we don't need to provide any supply at P5, right?

  • 0 in reply to Rakesh Bansal
    TI__Guru 66962 points

    Rakesh,

    If you are using 3.3V logic levels, the device to be used should be the TCAN1042GV-Q1. This includes VIO at pin 5 which will set the logic thresholds for the transceiver. In this case, you would supply pin 5 with 3.3V. 

    Regards,

    Eric Hackett

  • 0 in reply to Eric Hackett
    TI__Prodigy 10 points

    Hi Eric,

    I just got an update that we need a 10Mbps tranceiver. So can you please give me details of a CAN tranceiver that can support upto 10Mbps in FD mode?

    Regards,

    Shreenidhi

  • 0 in reply to Shreenidhi Bhat
    TI__Guru 66962 points

    Shreenidhi,

    There are no CAN FD transceivers in the market from any supplier that can support 10Mbps. The CAN FD specification only defines up to 5Mbps, and the highest that can be achieved by TI CAN transceivers is 8Mbps. 

    There is a new specification from CiA (CAN in Automation, the body that defines and specifies CAN for the world) called CAN XL which will define up to 10Mbps, but this is not fully released yet and there are no transceivers available that can perform at this speed.

    Regards,

    Eric Hackett