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TCAN1145-Q1: Questions regarding selective wake

Shunsuke Yamamoto
Genius 10021 points

Part Number: TCAN1145-Q1

Hi team,

  1. When TCAN1145-Q1 is on the sleep mode after configuring selective wake, the error occurs and then the it is cleared. Is TCAN1145-Q1 still on the sleep mode with selective wake?
  2. Does an error on the can bus affect selective wake while trying to set a selective wake by accessing the registers for selective wake?
  3. Which states is the state when the FRAME_OVF happens, Normal mode, sleep mode(selective wake enabled) and standby mode?

Best regards,

Shunsuke Yamamoto

  • 0
    TI__Mastermind 25142 points

    Yamamoto-san,

    1. Please clarify what you mean by "error." Is this a CAN error frame? It takes multiple CAN error frames to wake the transceiver. This is defined by register "FRAME_CNT_THRESHOLD"

    2. Your question is a little confusing. But if you are asking if a CAN error frame creates issues while configuring selective wake (SW), then the answer is yes. I recommend configuring all SW settings while the transceiver is in Standby mode. That way the transceiver cannot transmit/receive CAN data while SW is being setup. Once SW is finished setting up, TCAN1145 can switch to Sleep mode. 

    3. After FRAME_OVF, the transceiver enters Standby mode. 

    Best,

    Ethan