BQ40Z50-R2: Temperature configuration with TMP468

Hi Steven,

Would it be possible to send the .gg file of the gauge settings so we can look into the current temperature setup?

Regards,

Anthony

Hi Anthony

Please refer to attached file

6765.gg.csv

Thanks

Steven

Hi Steven,

It seems like your configuration is correct in the attached .gg file. Our firmware team is currently looking into this, I will provide an update once received.

Regards,

Anthony

Hi Anthony

Has there been any update from the firmware team regarding this behavior?

Thanks

Steven

Hi Steven,

Sorry for the delay, our team is working on receiving TMP468 EVM units so we can confirm this issue from our side.

Regards,

Anthony

Hi Anthony

Could you let me know when it will be completed? If it takes too long, it may impact our design schedule.

I also have some questions regarding the TMP468. Could you please help answer them?

1. How do I confirm the current setting for "configuration register 30h" for TMP468?

2. We've tested the shutdown mode power consumption, and it still seems to draw around 100µA.

    According to the TRM, the TMP468 should enter shutdown mode, but based on our power consumption test, it appears that it did not.

    How can I confirm whether the TMP468 is actually in shutdown mode?

3. The manufacturer access cmd 0x008A TMP load Config is used to reload the TMP468 configuration 

     What's the defualt setting for this configuration? When would I need to reload it?

4.  The manufacturer access cmd 0x008B TMP write register, how can I send this cmd via Advance comm SMB

     For example, if I want to change the TMP configuration (pointer register 0x30) from 0xFF18 to 0xFF38, could you provide the command sequence?

     Additionally, how can I verify that the command was successfully executed?

Thanks

Steven

Hi Steven,

Steven Zhang said:

Could you let me know when it will be completed? If it takes too long, it may impact our design schedule.

This is being done by our firmware team. I will discuss with them and get back to you on this.

Steven Zhang said:

1. How do I confirm the current setting for "configuration register 30h" for TMP468?

    

I believe this should be available by using the TMPRead commands:

Steven Zhang said:

2. We've tested the shutdown mode power consumption, and it still seems to draw around 100µA.

    According to the TRM, the TMP468 should enter shutdown mode, but based on our power consumption test, it appears that it did not.

    How can I confirm whether the TMP468 is actually in shutdown mode?

   

The SD bit seen in configuration register 30 should display whether the device is in shutdown:

Steven Zhang said:

3. The manufacturer access cmd 0x008A TMP load Config is used to reload the TMP468 configuration 

     What's the defualt setting for this configuration? When would I need to reload it?

I believe the default values for these configuration settings can be found in the TRM. When the golden image is programmed to a new device, the TMP468 will still need to be configured, which this command should do it all without needing to reprogram individually.

Steven Zhang said:

4.  The manufacturer access cmd 0x008B TMP write register, how can I send this cmd via Advance comm SMB

     For example, if I want to change the TMP configuration (pointer register 0x30) from 0xFF18 to 0xFF38, could you provide the command sequence?

     Additionally, how can I verify that the command was successfully executed?

If this were to be done in Advance Comm, I believe you would need to use the write block with 0x44, and in the block you would need to put 8B 00 for the command, then fill out the rest of the required information with the pointer and data:

Regards,

Anthony

Hi Anthony

Anthony said:

The SD bit seen in configuration register 30 should display whether the device is in shutdown:

Yes, I understand the SD bit in configuration register 30. However, according to the TRM, it should enter shutdown mode via the bq40z50, but the test results don't seem to reflect that. Could you also double-check the shutdown mode consumption with the TMP468 with the FW team?

Anthony said:

If this were to be done in Advance Comm, I believe you would need to use the write block with 0x44, and in the block you would need to put 8B 00 for the command, then fill out the rest of the required information with the pointer and data:

I've tried unlocking the TMP468 using the commands 8B 00 C4 EB 19 and 8B 00 C4 19 EB, but neither worked. The lock register still returns 8000. Could you show me the correct way to unlock it?

Thanks

Steven

Hi Steven,

Steven Zhang said:

Yes, I understand the SD bit in configuration register 30. However, according to the TRM, it should enter shutdown mode via the bq40z50, but the test results don't seem to reflect that. Could you also double-check the shutdown mode consumption with the TMP468 with the FW team?

Sorry for the confusion, while the gauge is in shutdown with the TMP attached the consumption current of the gauge is 100uA? If so, I will reach out to our team to confirm this.

Steven Zhang said:

I've tried unlocking the TMP468 using the commands 8B 00 C4 EB 19 and 8B 00 C4 19 EB, but neither worked. The lock register still returns 8000. Could you show me the correct way to unlock it?

I believe you need to write the necessary information using write block to 0x44 and 8B 00 C4 EB 19, then to see if it was written you need to use one of the TMPRead commands, where 81 00 is sent using 0x44 write block, then reading back 0x44 Read Block.

Regards,

Anthony

Hi Anthony

Anthony said:

This is being done by our firmware team. I will discuss with them and get back to you on this.

Any conclusion on this? 

Anthony said:

Sorry for the confusion, while the gauge is in shutdown with the TMP attached the consumption current of the gauge is 100uA? If so, I will reach out to our team to confirm this.

Yes, that's the result we obtained. Please confirm it. It would be helpful if you could test run mode, sleep mode, and shutdown mode. 

Anthony said:

I believe you need to write the necessary information using write block to 0x44 and 8B 00 C4 EB 19, then to see if it was written you need to use one of the TMPRead commands, where 81 00 is sent using 0x44 write block, then reading back 0x44 Read Block.

Yes, that's exactly what I did, but it's not working.

Thanks

Steven

Hi Steven,

Steven Zhang said:

Yes, that's the result we obtained. Please confirm it. It would be helpful if you could test run mode, sleep mode, and shutdown mode.

I have made our teams aware of both of these issues and are looking into them, I will get confirmation on the status of them.

Steven Zhang said:

Yes, that's exactly what I did, but it's not working.

Is Auto-Refresh in bqStudio on at this time? If so, there could possibly be conflicts with the communication since this is constantly sending commands to the device. 

Regards,

Anthony

Hi Anthony

OK, thanks for the help. 

Anthony said:

I have made our teams aware of both of these issues and are looking into them, I will get confirmation on the status of them.

When can you provide the test results for this? 

Anthony said:

Is Auto-Refresh in bqStudio on at this time? If so, there could possibly be conflicts with the communication since this is constantly sending commands to the device. 

Yeah, the auto-refresh was turned off while I was sending the commands.

Please also help confirm this:

We plan to use the PBI pin as the EN signal for the LDO, so when the gauge enters shutdown mode, the LDO will turn OFF, completely powering down the TMP468.

Are there any risks associated with this approach?

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/814795/bq40z50-r1-bq40z50-pbi-pin

Thanks

Steven