Nucleo-g474re

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Mohammed Faerber

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Aug 5, 2024, 11:10:15 AM8/5/24

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Iam working on a BMS application and i am using the BQ76PL536A-Q1 for reading cell voltages. Firstly, i want to program it with nucleo-g474re microcontroller. Which are the steps that i have to follow? Is the 7V pulse in LDOD pins necessary and how can i apply it easily, without any additional external circuit? Can i use the REG50 pin for this purpose, or just to give a pulse from any microcontroller pin?

To program the IC with your mcu, the IC can be communicated to with SPI. You will have to configure your MCU for four pins: CS, SCLK, SDI (MOSI), and SDO (MISO). Your MCU's SPI communication should look like this:

As this is an old IC, and the EVM has the user input their own 7V signal, I recommend either using an external power supply that your microcontroller may turn on and off with a MOSFET or use external batteries that are in the range of 6.75 to 7.25 that may also be connected via a MOSFET.