TPS6521905-Q1: Socket programmer not programming NVM memory

David Williamson

Part Number: TPS6521905-Q1
Other Parts Discussed in Thread: TPS65219EVM-SKT, TPS6521905

Tool/software:

Hi,

I am using the TPS65219EVM-SKT to configure and program a TPS6521905 part to my requirements. I have 5v going into the EXTPWR input of the board, and I am using the online GUI to setup the configuration. I am able to read and write the registers to the PMIC, and store and load these to an external file. Once I have written all the setups to the registers, there is no change in any of the outputs of the PMIC. I can also perform the NVM memory write with my configuration, and compare them correctly in the NVM Verification section of the GUI. (The hardware connected symbol shows that it is talking to the device on the EVM board.) Again there is no voltage on any of the outputs. However, after I have turned the power off to the EVM board, and powered it back up again, all the registers are zero, and the NVM memory write has clearly failed. Any suggestions as to why the programming sequence is failing for me will be gratefully received. Many thanks.

4 months ago

0 Sathish Vallamkonda 4 months ago

TI__Expert 6245 points

Hi David,

Thank you for reaching out on e2e.

Power cycling is needed for the new NVM settings to take into effect. However, it shows that NVM burn process failed.

Did you follow the 5 steps show on page 9 or 23 of the below document to complete the burn process?

https://www.ti.com/lit/pdf/slvucm5

Sathish

0 David Williamson 4 months ago in reply to Sathish Vallamkonda

Prodigy 10 points

Hi Sathish,

Many thanks for your reply. Yes indeed, I have followed those instructions many times...

David

0 Sathish Vallamkonda 4 months ago in reply to David Williamson

TI__Expert 6245 points

Hi David,

i think i know what is happening.

EN/PB of TPS6521905 is configured as Push Button. During the register writes for the new settings, did you change this? If not, after the NVM burn process and power cycle, try to push and release the PB switch and see if the rails power up.

Sathish

0 David Williamson 4 months ago in reply to Sathish Vallamkonda

Prodigy 10 points

Hi Sathish,

Many thanks for this, I pushed the button, and the voltages came to life! However, I have configured the device for EN and not PB, so should it actually be taking any notice of the button? Now that I have a setup loaded into NVM, I have several settings that need adjusting but I can't seem to change the NVM settings - the chip is acting as though its NVM is OTP - what am I missing, please?

many thanks, David.

0 David Williamson 4 months ago in reply to David Williamson

Prodigy 10 points

Hi Sathish,

I've played around, and everything seems to be Ok now. I am not sure how I did it, but I can update the NVM settings now.

rgds, David.

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TPS6521905-Q1: Socket programmer not programming NVM memory