AM625: The design of AM6254 using TPS6521903

user3895290

Part Number: AM625
Other Parts Discussed in Thread: TPS65219

Please tell me about the design of AM6254ATCGGAALW using TPS6521903RHBR.
(1) Update VDD_CORE (Buck1) from 0.75 to 0.85 via I2C command, supporting Cortex-A53 clock update following voltage change,
Please tell me the version of AM625 Processor SDK Linux.

(2) When updating VDD_CORE (Buck1) from 0.75 to 0.85 via I2C command, is there a specification for the I2C port to connect to? (should it be the I2C0 port?)

over 2 years ago

0 peaves over 2 years ago

TI__Guru 62835 points

AM62x devices do not support dynamic voltage change of VDD_CORE after reset has been released.

Regards,
Paul

0 user3895290 over 2 years ago in reply to peaves

Prodigy 80 points

Hello Paul

In the design of AM6254ATCGGAALW using TPS6521903, please tell me how to use the operating frequency of A53SS (Cortex-A53x) at 1.4GHz. Or is it not possible to use it at 1.4GHz?

Regards,
user3895290

0 peaves over 2 years ago in reply to user3895290

TI__Guru 62835 points

I'm not a PMIC expert, so I'm going to refer you to the Application note (Powering the AM62x with the TPS65219 PMIC) mentioned in the Power Supply Designs section of the datasheet. I glanced through the document, and it appears you need to use a TPS6521904 when needing to operate VDD_CORE at 0.85V.

Regards,
Paul

0 user3895290 over 2 years ago in reply to peaves

Prodigy 80 points

Hello Paul

Do you sell the TPS6521904?
If not, when will you start selling it?

Regards,
user3895290

0 Lavanya M R over 2 years ago in reply to user3895290

TI__Intellectual 1590 points

Hi,

Thank you for the reply.

Could you please confirm which memory type is using in your design?

Regards,

Lavanya M R.

0 user3895290 over 2 years ago in reply to Lavanya M R

Prodigy 80 points

Hello Lavanya M R.

Design with DDR4 as the memory type.

Regards,
user3895290

0 Lavanya M R over 2 years ago in reply to user3895290

TI__Intellectual 1590 points

Hi,

Thank you for the reply.

For your use case (core=0.85V with DDR4 memory type), TPS6521904 is the suitable PMIC.

Do you sell the TPS6521904?
If not, when will you start selling it?

I will assign your query to our PMIC expert.

Regards,

Lavanya M R.

0 Brenda Diaz over 2 years ago in reply to Lavanya M R

TI__Mastermind 22076 points

Hi,

TPS6521904 is the correct PMIC to power the AM62 + DDR4 for non-automotive applications. We are currently supporting pre-production samples and expecting to release the device to the market by end of the month. Just for reference, I have sent a private E2E message with the instructions to request pre-production samples.

Thanks,

Brenda

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AM625: The design of AM6254 using TPS6521903