TCAN1146-Q1: Selective Wake-up from Standby mode

Part Number: TCAN1146-Q1

Hi Team,

In Standby Mode with selective wake-up enabled I need to send 2 frames; 1 to enable WUF receiver and 1 to actual wake-up.

What would happen if between these frames I send some SPI communication to SBC? Does this affect the WUF receiver.

From my tests it seems that it does. I have 2 scenarios:

1. I send 2 WUP frames at a distance of 50milliseconds; SBC wake-up
2. I send 1 WUP frame, I send an SPI command(check status), I send another WUP frame; SBC does not wake up.

Could you confirm this?

Thanks,

Cornel