TCAN1146-Q1: recommend config for FD_EN

Scarlett Cao

Part Number: TCAN1146-Q1

Tool/software:

Hi team,

Is there specific reason we have FD_EN =0b by default? Customer is using TCAN1146 and wants to know if they should config this to 1b enabled.

Thanks

Scarlett

2 months ago

0 Sean Guo 2 months ago

TI__Mastermind 28500 points

Hi Scarlett,

It depends on if customer is going to use that feature. If they requires bus fault detection, they can set FD_EN to 1.

Regards,

Sean

0 Scarlett Cao 2 months ago in reply to Sean Guo

TI__Expert 4030 points

Hi Sean,

Customer is not using selective wakeup, my understanding is in this case WUP could wakeup the device. Customer found that when FD_EN=0, the device will be wake up by fault frame, when FD_EN=1, the device will not be wakeup by fault frame. Is it reasonable?

Thanks

Scarlett

0 Scarlett Cao 2 months ago in reply to Scarlett Cao

TI__Expert 4030 points

Hi Sean,

Just add the comment that customer doesn't want the device to be wake up by fault frame. So they want to know how FD_EN cause this behavioral differences.

Thanks

Scarlett

0 Sean Guo 2 months ago in reply to Scarlett Cao

TI__Mastermind 28500 points

Hi Scarlett,

This bit only turns on/off the ability of the transceiver to determine whether CAN bus faults (0x54) are taking place. I don't think it can affect wakeup function.

What is the definition of "fault" frame? Any CAN frame can actually be a valid WUP, if they need wakeup by selected CAN frame, they need to use selective wakeup.

Regards,

Sean

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TCAN1146-Q1: recommend config for FD_EN