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BQ76PL455EVM: BQ76PL455 EVM usign with a MICROCONTROLLER

YUSUF KARATAS
Intellectual 910 points
Part Number: BQ76PL455EVM
Other Parts Discussed in Thread: BQ76PL455A-Q1

Hello,

I want to use BQ76PL455EVM with a F28379d Launch Board or Arduino Mega. 

I have read the datasheet of BQ76PL455A-Q1 and there are some missing parts in my mind. Initially I just want to power it up and read some voltage values. So I will connect 3.3 VDC, GND pins, TX , RX pins to the related pins in uP and FAULT and WAKE up to the related GPIO pins.

(assume 6 cells are connected) 

1. When I set HIGH the WAKEUP pin, does it wake up directly ? Should I set LOW after it WAKES UP (I have read something like that) ? If so, when ?

2. After WAKE it UP, should I configure its BAUDRATE, ID, number of CELL or does it makes automatically and starts to reading voltage values ? Do I need to configure it?

3. After configuration , how I can read voltage of cells (for example 1st cell ?

After these questions, I believe I can proceed on my own further.

Thanks.

  • 0
    TI__Genius 9401 points

    Hi Yusuf,

    Regarding question 1,  the device wakes up when WAKEUP pin is high (if you have stacked devices, then you would need to send a WAKE tone through the COMM pins to wake up the stack devices). If you want to transition and remain in shutdown mode, then WAKEUP pin needs to be set low first. Otherwise, even though you send a shutdown command, if WAKEUP pin is held high, the device will shutdown and immediately wake up again. You can read more details about how to enter the different device modes on section 7.4 "Device Functional Modes" of BQ76PL455A-Q1 datasheet. 

    Regarding questions 2 and 3, you do need to initialize the device, configure the ADCs and enable conversions. The link below has the list of technical documentation available for this device. Please look at the "bq76PL455A-Q1 Software Design Reference" apps note and the "BQ76PL455A-Q1 Example Code" software. These show detail description and implementation of exactly what you are trying to do. 

    http://www.ti.com/product/BQ76PL455A-Q1/technicaldocuments?keyMatch=BQ76PL455A-Q1&tisearch=Search-EN-technicaldocument&usecase=part-number

    Best regards,

    Leslie

  • 0 in reply to Leslie Marquez
    Intellectual 910 points

    Hi Leslie,

    Great work. Thanks for your help. Software design document is what I have been looking for exactly.

    Thanks.