BQ25150EVM: Interrupt not generate on /MR press (pull low)

Akshay Patil1

Prodigy 170 points

Part Number: BQ25150EVM

Hi ,

I want to generate wakeup1 & wakeup2 interrupt by /MR pin low.

Code logic :

1. mask all interrupts.

2. mask MRWAKE1_TIMEOUT & MRWAKE1_TIMEOUT

3. pull /MR line low & wait for this flag,

But flag not generate(interrupt not occurs) after 125/500 ms on /INT pin

-> mode : adapter(VIN present)

why ??

/ Akshay P

over 4 years ago

0 Raheem over 4 years ago

TI__Mastermind 21590 points

Hello,

This will depend on the timer settings. You should see the flag set for the wake 1 timer but not the wake 2 timer when in VIN only mode. This is because when the battery is absent, the battery pin will toggle from VBATREG to ground due to the capacitor getting charged and discharged. The duration of that charge and discharge prevents the device to observe that /MR is pulled low for 2s since MR is pulled up to VBAT.

If you disable termination in register 0x15, you should be able to see the flags being set.

You can also enable the interrupts to double check.

0 Akshay Patil1 over 4 years ago in reply to Raheem

Prodigy 170 points

Hello Raheem,

From my question -> 2. mask MRWAKE1_TIMEOUT & MRWAKE1_TIMEOUT -> 2. Unmask MRWAKE1_TIMEOUT & MRWAKE1_TIMEOUT.

1. I could not see the flag set for the wake 1 timer also.

2. Right now ,i don't have battery.

3. Cross checked by disabling termination in reg 0x15, The same situation occurs.

Is there any prerequisite required for that ???

Thanks & Regards

Akshay P

Power management

Power management forum

BQ25150EVM: Interrupt not generate on /MR press (pull low)