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TCAN4550-Q1: TCAN4550-Q1 silent mode

Stefan Weber
Prodigy 100 points

Part Number: TCAN4550-Q1

Hi,

We are using TCAN4550-Q1 and would like to know how we can configure silent mode?

We were not able to find this in the datasheet/documentation.

Thanks

Best regards,

Stefan

  • 0
    TI__Mastermind 37181 points

    Hi Stefan,

    To enter Sleep Mode, you simply need to write to the MODE_SEL register field in the Modes of Operation and Pin Configuration Register 0x0800[7:6] = 00.

    This will immediately cause the device to enter Sleep Mode and shut down the internal LDOs leaving just the Wake Up Detection Monitoring circuits powered that are needed to detect one of the wake-up events.

    There are a couple of failsafe features such as the Sleep Wake Error timer that can cause the device to enter into Sleep Mode after it is powered on or has detected a wake-up event but has not been configured into Normal Mode or had the Power On interrupt bit cleared within 4 minutes.  

    Regards,

    Jonathan

  • 0 in reply to Stefan Weber
    TI__Mastermind 37181 points

    Hi Stefan,

    I'm sorry I misread your question.  This is referred to as "Bus Monitoring Mode" in the MCAN IP that is used in the TCAN4550-Q1.  You simply need to set the MON bit in the MCAN Control Register 0x1018[5] = 1 to enable the Monitor Mode.

    You can find more information about Bus Monitoring Mode in section 3.1.6 of the MCAN User's Manual (Link). 

    As a note, the only difference between the information in the MCAN User's Manual and the TCAN4550-Q1 with regards to MCAN is that there has been an offset of 0x1000 added to each MCAN register address in the TCAN4550-Q1.  So the Control Register has an address of 0x18 in the MCAN User's Manual but an address of 0x1018 in the TCAN4550-Q1. 

    Also note that the MCAN IP supports more MRAM elements through the register configuration (TX/RX Buffer, filter elements, etc.) than the TCAN4550-Q1 can support because there is only 2k of MRAM.  But otherwise all of the information in the MCAN User's Manual is relevant to the TCAN4550-Q1 as well.

    Regards,

    Jonathan