AM3351: AM3351/AMIC110 USB wake up signal

Part Number: AM3351
Other Parts Discussed in Thread: AMIC110

May I have question about AM3351 and AMIC110 hardware of wake up from sleep mode?

I understand there is no sample of sleepmode for RTOS/baremetal.

I think AM335x/AMIC110 USB have 2 wakeup signal that slv0_Swakeup and usbx_wout.

Both is connected WakeM3, and Only slv0_Swakeup connected to MPU subsystem.
Question 1

Could we use slv0_Swakeup for call interuupt function and wake up
directly ARM Cortex A8 in the interrupt function from sleep mode?

Question 2

Is WakeM3 hardware for wake up ARM Cortex M3 core that is device manegiment core?

If I want to wake up A8 core, I should make anything to Wake up A8 code in M3 interrupt function?

Thanks,

5 months ago

0 Kallikuppa Sreenivasa 5 months ago

TI__Guru*** 136198 points

Hello GR,

Thank you for the query.

I need to check with the expert.

Can you share the use case for the above queries that could help the experts answer the queries.

Regards,

Sreenivasa

0 GR 5 months ago in reply to Kallikuppa Sreenivasa

Expert 2311 points

Hello Sreenivasa,

Thanks for your supporting.

Kallikuppa Sreenivasa said:
Can you share the use case for the above queries that could help the experts answer the queries.

My customer is developing Small Printer (OS : RTOS)

And USB pheriperal use for both device and controller.

In considering, There is a specification to lower the standby power.

So they plannning use CPU low power mode for Lower power.

However CPU wake up signal could use only USB communication by specification.

Refering AM3351 TRM, may be USB interrupt signal could use ARM Cortex A8 wakeup.

I want to check is this correct.

Best regards,

+1 Kallikuppa Sreenivasa 5 months ago in reply to GR

TI__Guru*** 136198 points

Hello GR,

Thank you for the inputs.

Let me reach out to an expert internally and update you.

Regards,

Sreenivasa

+1 JJD 5 months ago in reply to Kallikuppa Sreenivasa

TI__Guru 71880 points

Please consult section 8.1.4.3.7 Supported Low Power USB Wakeup Scenarios for information on supported low power use cases with USB.

Regards,

James

0 GR 5 months ago in reply to JJD

Expert 2311 points

Hello James,

Thanks for your information.

I will reference.

Best regards,

0 Kallikuppa Sreenivasa 5 months ago in reply to GR

TI__Guru*** 136198 points

Hello GR,

Thank you for the note.

Regards,

Sreenivasa

Processors

Processors forum

AM3351: AM3351/AMIC110 USB wake up signal