AM2634: Disable Cores

Pouya Sabouriazad

Part Number: AM2634

Tool/software:

Hi,

I have a single core application that will be run on the R5FSS0 in lockstep mode. I want to disable the cores on R5FSS1. Could you please specify how I can disable cores on R5FSS1 in customized SBL?

Thanks,

Pouya

over 1 year ago

0 Nilabh Anand over 1 year ago

TI__Guru 57120 points

Hi Pouya

you can refer to this faq on how to enable lockstep mode

e2e.ti.com/.../faq-am2634-how-to-choose-setup-the-dual-core-with-lockstep-feature

0 Nilabh Anand over 1 year ago in reply to Nilabh Anand

TI__Guru 57120 points

Also by default the cores are in a reset state, so as long as you do not initialize them they would be disabled.

so in you sbl you can just chose not to initialize the r5ss1.

let me know if you know more info

0 Pouya Sabouriazad over 1 year ago in reply to Nilabh Anand

Prodigy 140 points

Hi Nilabh,

Thank you for your prompt response.

Can you please elaborate on the steps required to initialize a core?

According to AM263X Datasheet section 7.11.2.1.1, sometime after the de-assertion of PORz the R5F cores are unhalted. It seems like all cores not just R5FSS0_0 core. Also, according to AM263X tech reference manual section 6.2.2.1 at the end of power up sequence the internal reset to CPU is released. Do these statements mean the cores are out of reset state at the end of power up sequence and when we get to RBL and SBL?

Thanks,

Pouya

0 Nilabh Anand over 1 year ago in reply to Pouya Sabouriazad

TI__Guru 57120 points

Hi Pouya,

Please refer to the SBL OSPI code located at:

C:\ti\mcu_plus_sdk_am263x\examples\drivers\boot\sbl_qspi\am263x-cc\r5fss0-0_nortos\main.c

Please refer to the code in SDK for insight on how to program individual core and let me know in case if you need further more info.

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AM2634: Disable Cores