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BQ40Z80: Ts2 pin output signal doubt regarding

Mohan Raj
Prodigy 200 points
Part Number: BQ40Z80
Other Parts Discussed in Thread: BQSTUDIO

Hello Team,

I am using Bq40z80 for our project , we  took the waveform from TS2 to the BQ40z80  ,it shows as pulse attached below , we need to give this signal to our ST microcontroller pin .

Let me know the output of that signal  is getting proper , always the out put is pulse only bcoz from STM32 controller side that pin signal we are reading as analog value .

Could you please help me , how can i proceed , whether the expected signal out put we are getting or we need any correction in the BQstudio configuration.

Regards

Sachu

  • 0
    TI__Guru** 102375 points

    Hello Sachu,

    You cannot attach any other devices to the TS pins of the gauge, the gauge will momentarily bias the TS pins in order to take a temperature measurement. If you attach anything else to the pin it will lead to issues in the gauges correlation to a temperature value. You cannot force a temperature by biasing the TS pins with MCU.,

    You can use the WriteTemp command to communicate the temperature from the MCU. 18.1.74 ManufacturerAccess() 0x3008 WriteTemp.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Prodigy 200 points

    Hello Wyatt,

    Thanks for your reply .

    my intention is not attach any device there , the TS2 thermistor output will  take and give to input as  STM32 .

    but from thermistor I am getting these pulse signal  , let me. Know from thermistor we will get on these pulse signal 

  • 0 in reply to Mohan Raj
    TI__Guru** 102375 points

    Hello Mohan,

    I believe there is a misunderstanding. You should not attach anything to the TS pins besides the actual thermistor for the gauge to take measurements. You cannot attach a MCU to the thermistor with the gauge and get accurate readings from the gauge or MCU.

    If you mean you are trying to only attach an MCU directly to the TS pin without a thermistor - this will provide no data, the TS pins are inputs and only momentarily bias the pin to take a reading from the thermistor.

    What you are trying to attempt is not recommend and may not be possible.

    Sincerely,

    Wyatt Keller