SK-AM62A-LP: Enquiry Related PBIST

Hello Raj,

Raj Kumar said:

Is there any difference between PBIST and LBIST?

PBIST tests the internal memories for permanent faults such as stuck-up bits. The LBIST tests the internal logic circuits present in the SoC.

Raj Kumar said:

As I understand, BIST should be run only once per power cycle. What is the recommended approach to run it — from the SBL or as a native application on R5?

For what cores/memories are trying to run BIST?

PBIST and LBIST tests are destructive by nature and hence it is recommended to run these tests at startup before the MCU R5 core is loaded by the SBL.

Raj Kumar said:

Could you please provide the procedure to enable PBIST in the SBL?

The AM62Ax SBL should already have BIST integrated. You can check the SBL example mentioned below:

examples/drivers/boot/sbl_ospi_nand_linux_multistage/sbl_ospi_nand_linux_stage1/am62ax-sk/r5fss0-0_nortos/main.c

Regards,

Nihar Potturu. 

Hello Nihar,

Thank you for the replay,

Nihar Potturu said:

For what cores/memories are trying to run BIST?

A53 MPU CLUSTER0,CODEC PBIST3 ,MAIN PBIST0 and MCU PBIST0  is these possible to check?

I flashed the sbl_null in OSPI boot mode. We are going to use SD card or eMMC boot, so could you guide us on how to enable this in the SBL? Also, there is no information regarding PBIST in the AM62A TRM.

Thankyou,
Rajkumar.

Hello Raj,

Raj Kumar said:

A53 MPU CLUSTER0,CODEC PBIST3 ,MAIN PBIST0 and MCU PBIST0  is these possible to check?

I flashed the sbl_null in OSPI boot mode. We are going to use SD card or eMMC boot, so could you guide us on how to enable this in the SBL?

Please check the SDL PBIST example available in MCU+SDK:
https://software-dl.ti.com/mcu-plus-sdk/esd/AM62AX/latest/exports/docs/api_guide_am62ax/EXAMPLES_SDL_PBIST.html

You can initiate BIST for MCU R5 core from SBL as shown in the SBL examples. For rest of the instances, MCU R5 can directly trigger the PBIST test. You can use the SDL PBIST example for reference.

Regards,

Nihar Potturu. 

Hello Nihar,

Nihar Potturu said:

Please check the SDL PBIST example available in MCU+SDK:
https://software-dl.ti.com/mcu-plus-sdk/esd/AM62AX/latest/exports/docs/api_guide_am62ax/EXAMPLES_SDL_PBIST.html

This is available as an example application to run on R5. I saw the following file:
examples/drivers/boot/sbl_ospi_nand_linux_multistage/sbl_ospi_nand_linux_stage1/am62ax-sk/r5fss0-0_nortos/main.c.
In this example, they are running the BIST test and flashing the binary to NAND flash.

From my understanding, whenever I boot from OSPI NAND, only this bootloader comes into the picture and the BIST test is executed (please correct me if I'm wrong).

We require SD card/eMMC boot mode. Can this be enabled in SD/eMMC boot mode?
If yes, are there any steps available to follow?

Regards,
Raj

Hello Raj,

Raj Kumar said:

From my understanding, whenever I boot from OSPI NAND, only this bootloader comes into the picture and the BIST test is executed (please correct me if I'm wrong).

Yes, your understanding is correct.

Raj Kumar said:

We require SD card/eMMC boot mode. Can this be enabled in SD/eMMC boot mode?

You can enable this in EMMC mode. You can add the same code used in SBL OSPI in SBL EMMC applicaiton.

examples/drivers/boot/sbl_emmc_linux_multistage/sbl_emmc_linux_stage1/am62ax-sk/r5fss0-0_nortos/main.c

Regards,

Nihar Potturu.