BQ40Z50-R1: BTP interrupt pin not asserting

VENKATAPPA SACHIN

Part Number: BQ40Z50-R1
Other Parts Discussed in Thread: BQSTUDIO

Hi,

With Battery is in discharging state, when Current <= 0 and RemCap < Discharge_Set_Threshold I observe OperationStatus(BTP_INT) gets set to '1' but BTP_INT pin output NOT asserting.

However, on writing new value to BTPDischargeSet(), I am observing OperationStatus(BTP_INT) gets cleared to '0' and BTP_INT pin is getting de-asserted.

Please clarify why assert not happening.

Thanks in advance.

over 5 years ago

0 Wyatt Keller over 5 years ago

TI__Guru** 105590 points

Hello Venkatappa,

Make sure you have configured the BTP_EN and BTP_POL correctly otherwise the BTP pin will not assert. By default BTP_EN is set to 0, meaning the BTP interrupt will not be asserted.

Section 13.3.1.5 in the TRM discusses the BTP_EN and BTP_POL bits: https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf?ts=1592229789463&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FBQ40Z50-R1

Sincerely,

Wyatt Keller

0 VENKATAPPA SACHIN over 5 years ago in reply to Wyatt Keller

Intellectual 350 points

Thanks Keller for the reply.

Need one clarification.

Already we have enabled BTP_EN pin.

Why assert NOT happening but de-assert happening on write to BTPDischargeSet() register ? Please clarify.

Thanks in advance.

0 Andy Liu (BMS) over 5 years ago in reply to VENKATAPPA SACHIN

TI__Guru 52115 points

According to the TRM, when either BTPDischargeSet() or BTPChargeSet() commands are received, OperationStatus()[BTP_INT] will clear and the pin will be deasserted.

0 VENKATAPPA SACHIN over 5 years ago in reply to Andy Liu (BMS)

Intellectual 350 points

Thanks Liu for response.

On sending BTPDischargeSet(), OperationStatus()[BTP_INT] is getting cleared and pin got de-asserted.

But assert not happening when OperationStatus()[BTP_INT] is set and Settings.Configuration.IO Config[BTP_EN] is set.

Need clarify why assert not happening.

0 Kang Kang over 5 years ago in reply to VENKATAPPA SACHIN

TI__Mastermind 24870 points

Hello Venkatappa,

In order to further help us, can you capture a bqStudio log file and export a gg.csv file prior to the cycle.

The BTP should trigger if the SOC conditions are met.

Power management

Power management forum

BQ40Z50-R1: BTP interrupt pin not asserting