TPS25750: How do I write configuration data into TPS25750 after PBMs command?

keonyong kim

Prodigy 20 points

Part Number: TPS25750

Dear TI team.

I used TPS25750 for power PD.

There is a problem that the board resets when our board is used more than 1.5A during boot.

I want to set the current to 3.0A.

So I need help setting up the configuration via I2C without EEPROM.

Chip status is below :

Device configuration using ADCIN1 and ADCIN2 is AlwaysEnableSink.

When I read the mode(Reg 0x3) via I2C in bootloader, the value is "PTCH".

For writing configuration data( by using "TPS25750 Application Customization Tool(SINK only) )

1. check if it is in "PTCH" mode.

2. create Data1( fw_size, savle address, bust_mode_timeout)

3. send CMD1 with "PBMs"

For writing configuration data after 1~3 sequence,

What register should I write configuration data to ?

Thanks.

over 2 years ago

0 Eric Beljaars over 2 years ago

TI__Mastermind 36756 points

Hello,

Section 3.3.4 of the TPS25750 Host Interface TRM document has a step-by-step guide for how to implement the Patch Burst Mode sequence. This is how you can load a configuration onto the TPS25750 through your MCU, without an external EEPROM.

Once you've completed Step 1-3 that you highlighted, you will then need to complete the following step:

"The host shall then transmit the entire patch-bundle data. The host may send the entire Patch Bundle in a single I2C transaction, or it may break it into multiple transactions. The PD controller increments the pointer into its patch memory space with each byte received on the Patch Slave address that was configured as part of the 'PBMs' 4CC Task."

Thank you,
Eric

0 keonyong kim over 2 years ago in reply to Eric Beljaars

Prodigy 20 points

Dear Eric Beljaars

At the step 3 in chater 3.3.4

1. write Data1 that has Patch Slave address as 0x21 (same as chip's slave address) and Patch bundle size.

2. write CMD1 that has PBMs for starting patch download process

How do chip read bundle data and write it in I2C?

(I don't think there is not a pointer with bundle data. )

Thanks

0 keonyong kim over 2 years ago in reply to Eric Beljaars

Prodigy 20 points

Hi Eric

What is slave address number for patch data in TPS25750?

Thanks.

0 Christodulos Tsongas over 2 years ago in reply to keonyong kim

TI__Genius 12905 points

Keonyong,

This is dependent on the ADC settings.

Thanks,

Chris

0 keonyong kim over 2 years ago in reply to Christodulos Tsongas

Prodigy 20 points

Dear Christodulos Tsongas

I used 0x21 for TPS25750's slave addres accroding to ADCINx.

At Chapter 3.3.1 (in "TPS25750 Host Interface Technical
Reference Manual" Ducument.)

Byte5 discription of the Input data explains that the slave address(0x21) is invalid.

Can I use the same slave address when downloadding configuration data?

Thanks.

0 Christodulos Tsongas over 2 years ago in reply to keonyong kim

TI__Genius 12905 points

Understood. This is should be a different address than the ADCIN configuration settings. So 0x21 would be invalid but 0x20 would be OK.

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TPS25750: How do I write configuration data into TPS25750 after PBMs command?