BQ34Z110 X10 scaling parameter (bit 7 of the Pack Configuration Register) effects

X10 Mode Clarification Required -- Does anyone on the BQ34Z110 development team attend to this bulliten board???

The "X10 MODE" section on page 21 of the data sheet remains cryptic.

The statement "When the X10 bit (Bit 7) is set in the Pack Configuration register, all of the mAh, cWh, and mWh settings will take on a value of ten times normal." is totally misleading!!

Assumed correction (please confirm or correct) -- Setting the X10 flag does "not actually change anything" (as stated later in the paragraph).  All (not various) current and capacity (mA and mAh) parameters are scaled during calibration.  Calibration does NOT affect any mWh parameter or non-existent cWh parameter.  Ten is not the only scaling multiple for current and capacity that can be used during the calibration step, e.g., apply 1 amp with a calibration value of 2 amps scales by 2, i.e., a reading of 1 amp is actually 2 amps (scaled by 2), apply 500mA and set value at 2 amps scales at 4, or apply 200mA and set value at 2 amps scales at 10, etc. 

All energy and power parameters (mWh and mW) are ONLY scaled by the Design Energy Scale parameter, but it only supports valid factors of 1 or 10 (See Table 10).

Please confirm or explain clearly how this device operates.    Thanks,

Guten Tag, Grüezi, Hello Ken Habegger

We have an BQ34Z110 EVM. We can read the parameters from the device with the EVM software. However if we change any parameter in the data flash -> configuration -> any parameter by pressing enter we get a pop up warning window with the message "Type mismatchtxtEdit_LostFocus". My question is: Can you change any parameters with the PC software on the EVM- Board? Is there a special way or trick to change the paramters?

Regards

Markus Hoffet

Markus,

We have had no problems updating the configuration file in on our application using the BQ34Z110; we are not currently using the EVM.   We have had issues after sealing and subsequently unsealing the gas gauge; attempting to change parameters did not update, but without the error message you indicated.   We reloaded the *.senc file and basically started over to reconfigure after the gas gauge had been sealed.

Please verify that you are using version 004 of the *.senc as my previous EVM had an older version 002 when I received it.

Maybe some TI development/support staff can provide some suggestions!!??!!

Thanks,

Markus

This might sound strange however the EVM software does not Run under WIN7 /WIN 8 only under XP ,please verify if you are useing Win XP ;

I would expect an software that gets released in 2012/2013 would run under Win 7 

Hope this helps you 

Regards 

@ Peter, Thank for the hint about the Win XP. I definitly expected that a software whitch was released in 2012 runs under windows 7!

@ Ken, Tahnks for you awnser. We wrote already a few things in the TI forum but...

How do you set the X10 mode bit? Unfortunately we can't find the right informations into the data sheet or somewhere else.

THX

Markus

Markus,

The X10 bit is bit 7 of the low byte in the pack Configuration Register (p20 of the Dec 2012 revised data sheet).   The description is once again confusing as the first sentence suggests "settings and reports will take on a value of ten times normal."   Then the next sentence indicates, "This setting has no actual effect within the gauge."  The host uses this bit to indicate that "a scaling factor" has been applied during the calibration of the gas gauge whether the scaling is ten times, four times, two times, etc.

Thanks,

Hallo Ken 

It seems that we have the same problem regarding the parameter setting of the Bq34z devices specially in X10; I want to ask you if you could look at my post and see if you could share some info on this  I would really appreciate it

http://e2e.ti.com/support/power_management/battery_management/f/180/t/252036.aspx

Best Regards 

Peter

Hello Ken,

Did you get a definitive answer to this question?  I am still rather confused by the x10 modes.  I am assuming that to measure 320A, I need to set the x10 bit in Config register, which then means ALL mA, mAh and mWh (as you listed) are reported as y/10 (so need to be set to 1/10th expected values) - is this correct?  Then what effect does setting the x10 Design Energy Scale have?  Does this mean that the mW and mWh values in Table 10 are actually y/100 if both bits are set? 

Sorry to be asking you, but I wasn't sure who was the authority in the forum on this.

Lois

Hello Lois,

as I understand x10 mode is just a flag for you that does absolutely nothing inside the chip. To achieve x10 mode you need to apply a forced load like 10A and say the BQ34Z that it is just 1A. So this works with other factors as well.

Regards,

clemens

Thanks Clemens,

Yes - setting the x10 bit in Config Register does have this efffect, and my device seems to be reporting correctly.  But I wondered what additional effect the x10 Design Energy setting had, if used as well as the Config Register bit.

Lois