• State
  • Locked Locked
  • Replies 7 replies
  • Subscribers 63 subscribers
  • Views 990 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ34Z100 I2C communication error 772

Harm Lok
Prodigy 145 points
Other Parts Discussed in Thread: BQ34Z100

When starting the program, i come in the DATA RAM page which seems to be work good.

If i i press the refresh button, two off the flag blocks are colored .  When i switch to DATA FLASH page i getting the error message  :

Date: Time : Error reading Data Flash Subclass

Lifetime Temp Samples  Code = 772

Is it possible that the chip is in sleeping or power down mode , it is a brand new unused chip.

  • 0
    TI__Prodigy 685 points

    Hi, Harm,

    I think the gauge IC might be sealed. You can check the Control Status bit [SS] [FAS] in DATA RAM. If set , the IC is sealed.

    you should unsealed it according to the User Guide.

  • 0 in reply to Cheng Wang
    Prodigy 145 points

    I have tried to unseal it. but I still receive the same messages and thete is no communication see my first mail.

    In the userguide is wriiten When this is the first time younuse these chips , please connect a power supply to pack - and pack +  . to get the device out the power downd mode. 

    can somenone tell me what texas means with this sentence.  Did i have to put the power supply between the pos and the groung to the output off the shunt resistor.

  • 0 in reply to Harm Lok
    TI__Prodigy 685 points

    Hi, Harm,

    Which is the gauge IC you use?  I think you do not need to connect a power supply if you can see DATA RAM page.

    If you unseal it successfully, the [FAS] and [SS] bit will be green in the DATA RAM page. Could you check it again?

  • 0 in reply to Cheng Wang
    Prodigy 145 points

    hello Cheng,

    In the data ram page there are three blocks with flags who can be green or red. When i press the Refresh button sometimes during communication i have  receiving the message no acknowledge:VB_T2h_nack and from the three blocks there ara only two blocks colored .  It is random wich two blocks are colored. Sometimes there is only one block with flags colored. When the blocks are colored the red ones are always reading the same  : Pack configuration RFACTSTEP , SLEEP, RSNS0, TEMPS.  Flags Scanning : CHG, SOCF, DSG  Control status : All green

    My gauge chip is a BQ34Z100 . when i use the ev2300 with my evm board everything works fine, so i think the programmer and software on my computer are doing well.

    Hope you can help me some steps further.

  • 0 in reply to Harm Lok
    TI__Prodigy 685 points

    Hi, Harm,

    I do not sure what problem is now . So you can capture the picture of the software ,  I can try to find the cause .

  • 0 in reply to Cheng Wang
    Prodigy 145 points

    Finaly i have solved this problems. I have focused on the communicatie and the ti engineers also. But the lost of the acknowledge was caused by the supply. The capacitor of 1 uf  over the  regin and vcc is absolute crusial. In the first design a have a resitor  in series with the capacitor. When i  mounted the capacitor directly between vss an vregin the communications worked excellent. Hope this helps someone who have the same problem.

    when measuring whit the oscilloscoop you can see that the vreg signal is not stabil whitout the capacitor . There is a ripple of max .3 Volts so it chanching between 2,3 and 2,8 Volts randomly. 

  • 0 in reply to Harm Lok
    TI__Prodigy 685 points

    Hi, Harm,

    Thank you for your kindness share.