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TCAN330G: Silent Mode vs. Tx=H

Erik Jones1
Prodigy 10 points
Part Number: TCAN330G
Other Parts Discussed in Thread: TCAN337G, TCAN334G

I am new to designing with CAN-BUS. I have an application for the TCAN33XG that requires both "Silent Mode" supported by TCAN330G and TCAN337G and "Standby Mode with Wake" supported by TCAN334G.

The data sheet defines Silent mode as "silent" or "receive-only" mode of the device. If the design will NEVER use Tx or transmit onto CAN BUS (Always a listener), would puling Tx HIGH on TCAN334G equate to "Silent Mode"? Or, can the device still transmit data with Tx pulled H as Table 6 defines (output: Z).  

  • 0
    TI__Guru 60202 points

    Erik,

    Functionally, yes, never toggling TXD would equate to Silent mode since the CAN node would never be transmitting to the bus. As a state of the device it would be different because in silent mode, the bus transmitter on the transceiver is actually disabled, not allowing for any transmission even if TXD is toggled, and lowering the overall current consumption since the transmitter is disabled. 

    Again though, if the TXD is never toggled, then effectively the device is in silent mode because it can still receive the data from the bus and toggle the RXD pin as a result.

    Please let me know if you have any other questions.

    Regards,