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LED Driver ICs Forum Discussions

User20590
Level 1
First question asked
Level 1
I'm concerned about an identical identification of a TER message with a read back of a register command.
Could there be a mix match between STD Diagnosis and Read Commands?
What to do to reliably detect a TER case?
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j_oehmen
Moderator
Moderator 10 replies posted 5 replies posted 10 questions asked
Moderator
There are two ways to check if a transmission error has happened:

1) Monitor the TER flag on the SO pin in the time window between the chip select assertion and the first clock rising edge, please refer on figure 28 of the TLD5501-2QV datasheet. Usually this solution requires extra HW (i.e. one extra GPIO).
2) Monitor the TER bit in the standard diagnosis. You can distinguish the standard diagnosis frame from another frame response by checking the frame MSB. In a standard diagnosis frame the MSB is set to 0. In case of a response after a reading request the TLD5501-2QV is setting the MSB of the frame to 1.

Find the datasheet and more information on https://www.infineon.com/cms/en/product/power/lighting-ics/litix-automotive-led-driver-ic/litix-powe...

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j_oehmen
Moderator
Moderator 10 replies posted 5 replies posted 10 questions asked
Moderator
There are two ways to check if a transmission error has happened:

1) Monitor the TER flag on the SO pin in the time window between the chip select assertion and the first clock rising edge, please refer on figure 28 of the TLD5501-2QV datasheet. Usually this solution requires extra HW (i.e. one extra GPIO).
2) Monitor the TER bit in the standard diagnosis. You can distinguish the standard diagnosis frame from another frame response by checking the frame MSB. In a standard diagnosis frame the MSB is set to 0. In case of a response after a reading request the TLD5501-2QV is setting the MSB of the frame to 1.

Find the datasheet and more information on https://www.infineon.com/cms/en/product/power/lighting-ics/litix-automotive-led-driver-ic/litix-powe...
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