TPS25750EVM: charger/device connection intimation to processor

Chuck,

Link is missing.

Regards,

B Sandeep.

Chuck,

I have configured GPIO with GUI for plug and ufp_dfp event and programmed the flash. I am not seeing the plug and ufp events in GPIO_STATUS register when i read with aardvark tool.

Please suggest me if I am missing anything.

Regards,

B Sandeep.

Sandeep,

From the Web based GUI, can you click the save configuration button and provide me the JSON.  This will allow me to match your configuration on my EVM.

If you need me to help describe the process.  I am happy to help.

Hi Chuck,

I am able to read the registers. There is option for selecting SourcePDOContractBit as GPIO event in customization tool but i don't see any register to check the status of SourcePDOContractBit in TPS25750 TRM.

Regards,

B Sandeep.

Sandeep,

There is not a register to read the GPIO status.

You can read the ACTIVE_CONTRACT_PDO Register (0x34) to read the current contract and determine which GPIO is supposed to be set.

Regards,

Chuck

Chuck,

I have configured GPIO0 for ufp_dfp_event_port1 and programmed the same in EEPROM. I can see the direction bit configured as output from the register but GPIO value is not changing even if i connect pen drive in place of charging cable.

ADCIN1 and ADCIN2 are set to 1V5 in EVM , do i need to change ADCIN1 and ADCIN2 settings?

Please suggest steps on toggling GPIO0 with any of the event available in TPS25750D.

Regards,

B Sandeep.

Chuck,

I will check and update on custom board as ADCIN1 and ADCIN2 are tied to 1V5 in EVM.

Regards,

B Sandeep.

{"questionnaire":{"version":"7.0.1.3","answers":[0,1,1,0,3,1,1,null,1,null,0,8.4,2,0.04,0.04],"options":{},"configID":"0000","vendorID":"0000"},"configuration":{"data":{"selected_ace":[{"register":22,"data":[10,48,48,77,0,0,0,0,0,0,3]},{"register":50,"data":[2,168,42,44,145,1,38,44,209,2,0,44,177,4,0,244,65,6,0,0,0,0,0,0,0,0,0,0,0,0,0]},{"register":51,"data":[2,44,145,1,16,44,209,2,0,44,177,4,0,244,65,6,0,69,65,6,0,0,0,0,0,0,0,0,0]},{"register":92,"data":[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,48,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,29,0,0,0,0,0,0,0,0,0,0,0,0]}]}}}

ADCIN1 and ADCIN2 are tied to ground.

I generated the bin file from GUI tool with DRP, Power source, 8.4V, 2A charging current and programmed, battery charging is not happening.

Please provide me reference EVM bin file.

Regards,

B Sandeep.

Sandeep,

Are you able to share the TPS25750 and BQ25792 section of your schematic for me to review?

Regards

Chuck

Chuck,

Please find the attached schematic for your review.

R331 and R332 are no mount in attached schematic.

PD_BQ.pdf

Regards,

B Sandeep.

Chuck,

1. Your design is missing the Pull-Up resistors for I2C_SCL_PD and I2C_SDA_PD which are your net names for I2Cm_SCL and I2Cm_SDA.                                                                ----Pull up resistors are there in the schematic provided near TPS25750 R196 and R197
2. You need to no populate R205 as well so that you do not fire the I2Cs_IRQ on power up.  I suggest that this pin be pulled high to LDO_3V3 on your next revision or blue wire. USB-PD_CHG_EVM I2Cs_IRQ connected to ground so we also connected to ground, will try what you suggested.
3. Remove R332 and R331 (no populate) so that you power up in SafeMode for EEPROM boot.  You should also change these resistors to be 100K to reduce the load on LDO_3V3  Can you provide in detail which mode to be used because the safe mode says it doesn't enable sink path and I need both source and sink mode. Please provide me if any document available on modes to be used. Battery is providing current to the circuit but not getting charged when i connect adapter with custom board.

Regards,

B Sandeep.

Sandeep,

The mode decode is shown in the datasheet, but I have also included a table that shows what voltage is used for each of the decodes.

I will refer this to our BQ CHarger expert next week for additional support on the charger setup.