BQ40Z50-R3-DEVICE-FW: BQ40Z50-R3 GPIO LEDCNTLC can not set

Star Xu

Genius 9645 points

Part Number: BQ40Z50-R3-DEVICE-FW

BQ40Z50-R3 set the register as below:

GPIO_EN, turn off LED_EN.

Settings-Configuration:

Flag Map Set Up is set to 0x8434 to pull GPIO LEDCNTLA (Pin20 pin) high when the Charging Status is in HV state.

Flag Map Set Up set to 0x8234 can pull GPIO LEDCNTLB (Pin21 pin) high when Charging Status is in HV state.

Flag Map Set Up is set to 0x8634, but GPIO LEDCNTLC (Pin22 pin) can not be pulled up, and also can not pull up by writing 0x0040 using GPIO Write().

How the set this register?

Thanks

Star

over 4 years ago

0 Wyatt Keller over 4 years ago

TI__Guru** 105590 points

Hello Star,

What is the desired operation for all the GPIOs? Are you having issues with all 3 or just pin 22?

Sincerely,

Wyatt Keller

0 Star Xu over 4 years ago in reply to Wyatt Keller

TI__Genius 9645 points

Thanks for your reply.

LEDCNTLA and LEDCNTLB are both implement GPIO operation, but the operation of GPIO LEDCNTLC is invalid.

I want to know what setting causes this invalidity.

Thanks

Star

0 Wyatt Keller over 4 years ago in reply to Star Xu

TI__Guru** 105590 points

Hello Star,

Can you explain the tests done further? Was the GPIOwrite command sent to the other pins with the configurations you sent earlier and it worked with pin 20 and pin 21 but not pin 22?

It looks like the GPIO should be set high writing 0x0040 to GPIOwrite (0x49).

Sincerely,

Wyatt Keller

0 Star Xu over 4 years ago in reply to Wyatt Keller

TI__Genius 9645 points

Hi Wyatt Keller

Thanks for your reply.

We need to connect a self-discharge circuit, then open the discharge loop through the GPIO, pin20 and pin21 can be used normally.

Only Pin 22 has a problem.

Thanks

Star

0 Wyatt Keller over 4 years ago in reply to Star Xu

TI__Guru** 105590 points

Hello Star,

Can you share the .gg file, I'd like to test it on my side with the EVM.

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ40Z50-R3-DEVICE-FW: BQ40Z50-R3 GPIO LEDCNTLC can not set