TCAN1043A-Q1: Help needed on local wake up detection

VISWANATH YANAMANDRA

Part Number: TCAN1043A-Q1

Tool/software:

Hello,

We are using TCAN1043A-Q1 in our project.

There are 2 wakeup sources in our project one is CAN and another one is RTC. Interrupt from RTC chip is connected to WAKE pin of TCAN1043A-Q1.

The RTC chip is configured to generate an edge upon alarm expiry. The requirement is to wakeup the cluster and write into NVM and go back to sleep.

Could you please share the procedure to detect the wakeup by WAKE pin?

Please let us know if any details are required.

Thanks for your time.

Regards,

Viswanath

2 months ago

0 Sean Guo 2 months ago

TI__Mastermind 27360 points

Hi Viswanath,

A pulse on the WAKE pin will be recognized as a LWU, the transceiver will be waked up and pull INH high. Then the INH can enable your PMIC to power up the whole system.

Regards,

Sean

0 VISWANATH YANAMANDRA 2 months ago in reply to Sean Guo

Prodigy 120 points

Hi Sean,

Thanks for the response.

We don't want to wake entire system when there is a local wakeup event.

Could you please share the procedure to differentiate the wakeup reason (by CAN bus or by Local wakeup)?

Thank you.

Regards,

Viswanath

0 Sean Guo 2 months ago in reply to VISWANATH YANAMANDRA

TI__Mastermind 27360 points

Hi Viswanath,

Please see the table 8-1, the wake source recognition is by nFAULT pin.

Regards,

Sean

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TCAN1043A-Q1: Help needed on local wake up detection