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BQ20Z95: can I write parameters into the chip through ordinary 51MCU serial port ?

yj w
Prodigy 130 points
Part Number: BQ20Z95


 

Dear all:

The notebook computer old circuit in the battery was crashed somehow. I want to replace the old bq20z95 with a new bought bq20z95. I know that others use EVSW to write parameters into the chip, which I don’t have. So, can I do it through ordinary 51MCU serial port to write commands?

The new bq20z95 uses in the four-cell mode in default, and I want to change it to the three-cell mode. Can I just write such parameters below into the chip without other else?

DesignCapacity

DesignVoltage

POV Threshold (Offset 7)

POV Threshold (Offset 7)

PUV Threshold (Offset 17)

PUV Recovery (Offset 20)

Charging Voltage (Offset 2)

Depleted Voltage (Offset 8)

Depleted Recovery (Offset 11)

Depleted Voltage (Offset 8)

 

Thanks very much.

  • 0
    TI__Guru 54715 points
    Hi yj,
    A MCU can be used to read and write the bq20z95, see the technical reference manual and related application notes for the device. However your proposal may not be successful. The original designer provided a number of other parameters to properly configure the gauge for the cells and system design. While you can design a battery and configure the part to gauge well, it is uncertain how the system designer set up the gauge to work in their system, and your battery may not be accepted by the notebook.