BQ2050: DQ bus communication with MSP430

Dilshad Rejeev

Part Number: BQ2050
Other Parts Discussed in Thread: BQ34Z100

I am using an MSP430 controller to communicate with the battery guage IC (bq2050). The bq2050 has a single line DQ bus communication to transmit the internal parameters of the battery. The speed of bq2050 is very low at 333 bits/S. If i use GPIO's to implement the DQ bus protocol, it would hold up the host controller (MSP430) for a long time until all the data is read from bq2050. Is there any alternate way to communicate with the battery guage IC. Please share any sample code if available.

Please suggest if any DQ to UART converter chips modules are available so that i can directly IN/OUT data through the UART.

over 5 years ago

0 David Hien over 5 years ago

TI__Genius 10830 points

hi Dilshad,
I can't seem to find such a product.

BTW can you let me lamp why you're using a device over 20 years old for what seems to be a new design?

Regards,
David

0 Dilshad Rejeev over 5 years ago in reply to David Hien

Prodigy 20 points

Hi David,
We are just developing a new battery charger. The battery (with bq2050 circuitry) is already in use and is an old product.
Could you please suggest which is the best possible method to read the data from battery?
Is there no other way other than implementing the DQ bus protocol using GPIOs of the host controller?

Thanks and Regards
Dilshad

0 Batt over 5 years ago in reply to Dilshad Rejeev

TI__Mastermind 42535 points

Sorry, for this DQ is the only mode of comm. I would suggest that you look at the bq34z100 if you want an alternative gauge.

Power management

Power management forum

BQ2050: DQ bus communication with MSP430