TPS1689: Programming Issue

Leo Wu

Prodigy 10 points

Part Number: TPS1689

Tool/software:

Hi TI team,

This is Leo Wu from the Dediprog MCU Support Team.

Now I have programming issue about TPS16890.

After performing a power cycle, the register values I read back do not match the values I programmed earlier.

The following procedure is my programming flow:

1.Unlock the MFR_WRITE_PROTECT

2.Check CONFIG_NVM_STAT of STATUS_MFR_SPECIFIC_2

3.Write Register data and Read Register data to check different

4.Send STORE_USER_ALL

5.Check MEMORY_FLT of STATUS_CML

6.Do power cycle

After doing power cycle, I use the following procedure to read out data:

1.Unlock the MFR_WRITE_PROTECT

2.Send RESTORE_USER_ALL

3.Read the register data

However, the register values read after the RESTORE_USER_ALL command are different from what I initially programmed. Could you please help check if there's anything incorrect or missing in my procedure?

Looking forward to your guidance.

Thanks and Regards,

LeoWu

2 months ago

0 Kunal Goel 2 months ago

TI__Guru* 79131 points

Hi LeoWu,

Restore user all will load factory default values and you will not see new progarmmed values.

Regards

Kunal Goel

0 Leo Wu 2 months ago in reply to Kunal Goel

Prodigy 10 points

Hi Kunal,

Thanks for the help.

Could you please advise how I should read the newly programmed values correctly?

Thanks and Regards,

LeoWu

0 Kunal Goel 2 months ago in reply to Leo Wu

TI__Guru* 79131 points

Once you have burned values in nvm , then you don't have to do anything else. When you will read register you will see programmed values.

0 Leo Wu 2 months ago in reply to Kunal Goel

Prodigy 10 points

Hi Kunal.

After I tried your advice, the result remains the same.

The values read back are still different from the ones I programmed.

All I did after programming was a power cycle, and then I read the registers.

Is there anything I might be missing or doing incorrectly?

Regards,

LeoWu

0 Leo Wu 2 months ago in reply to Leo Wu

Prodigy 10 points

Hi Kunal,

The following waveform is my programming waveform.

The following waveform is read register without power cycle, like the above step3 of programming procedure.

Then all the programming procedure are same with the above.

But after I do the power cycle, then read the same register, the value is changed.

I don't send the RESTORE_USER_ALL.

Regards,

LeoWu

0 Kunal Goel 2 months ago in reply to Leo Wu

TI__Guru* 79131 points

Hi Leo,

Please share device top marking image.

Regards

Kunal Goel

0 Leo Wu 2 months ago in reply to Kunal Goel

Prodigy 10 points

Hi Kunal,

The following picture is the marking image.

Regards,

LeoWu

0 Kunal Goel 2 months ago in reply to Leo Wu

TI__Guru* 79131 points

Hi Leo,

You can burn to NVM maximum 6 times. Did you cross that number?

Regards

Kunal Goel

0 Leo Wu 2 months ago in reply to Kunal Goel

Prodigy 10 points

Hi Kunal,

I have tested one unit and programmed it six times. However, each time I read back the values, they are different from what I programmed.

Can I send you the whole capture of waveform?

Additionally, I observed that during the first programming attempt, the MEMORY_FLT status bit is 0. But from the second attempt, the MEMORY_FLT bit is set to 1.
I am confident about the number of programming cycles performed.

Regards,

LeoWu

0 Kunal Goel 2 months ago in reply to Leo Wu

TI__Guru* 79131 points

Hi Leo,

Can you share details of values and registers of what you are writing?

Regards

Kunal Goel

0 Leo Wu 2 months ago in reply to Kunal Goel

Prodigy 10 points

Hi Kunal,

I think it would be helpful to share some actual data with you.

Below are some of the register addresses and the corresponding data values we received from our customer, which are required to be programmed into the device

58h = 0x0000
59h = 0x0070
57h = 0x00FF
55h = 0x009C
43h = 0x0000
5Fh = 0x0070

These are part of the full register set that needs to be programmed.

Regards,

LeoWu

0 Kunal Goel 2 months ago in reply to Leo Wu

TI__Guru* 79131 points

Thanks. Please let me check and get back.

0 Leo Wu 2 months ago in reply to Kunal Goel

Prodigy 10 points

Hi Kunal,

Thanks for your help.

Please let me know if there are any updates or additional information regarding this issue.

Regards,

LeoWu

0 Kunal Goel 2 months ago in reply to Leo Wu

TI__Guru* 79131 points

Hi Leo,

Let's chat on e2e messaging.

Regards

Kunal Goel

0 Leo Wu 2 months ago in reply to Kunal Goel

Prodigy 10 points

Hi Kunal,

OK.

Regards,

LeoWu

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TPS1689: Programming Issue