TPS65987D: HRESET does not affect reading of SPI memory

Velykokhatko Sergey

Part Number: TPS65987D

Hi all,

I have TPS65987EVM in original configuration, and I see following: TPS65987D reads the SPI memory only at power on, not when I press the "S2 PD Reset" button on EVM. Is this ok?

Thanks,

Sergey

over 5 years ago

0 Prajith Cheerakkoda over 5 years ago

TI__Expert 8260 points

Hi,

Yes, this is expected behavior. PD controller wont erase RAM content during HRESET. So, it will boot from RAM next time, instead of SPI flash.

If I answered you, PLEASE select This resolved my issue to close this thread.

Thansk
Prajith

0 Velykokhatko Sergey over 5 years ago in reply to Prajith Cheerakkoda

Prodigy 235 points

Hi Prajith,

That means in case when PD started with default configuration and we programmed the SPI NOR, we cant start PD from SPI NOR without power cycle? S.

TPS65987D: Using default configuration to boot Linux system from USB stick - Interface forum - Interface...

e2e.ti.com

Part Number: TPS65987D Hi all, We have the following use case: ApolloLake SOC and TPS65987D for using in DRD mode. The USB-HS signals routed directly to ApolloLake

Thanks,

Sergey

0 Prajith Cheerakkoda over 5 years ago in reply to Velykokhatko Sergey

TI__Expert 8260 points

Hi,

Please find boot flow in page 12 of http://www.ti.com/lit/an/slva972a/slva972a.pdf.

PD controller will not boot from SPI flash if it finds valid patch bundle on SRAM.

Thanks
Prajith