I have questions about the MC33772 chip.

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I have questions about the MC33772 chip.

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jj0371
Contributor I

Hello, I would like to ask a question when testing the MC33772 chip.

1) Is it possible to activate Sleep-Wakeup / Fault Pin using GPIO 0 pin?
2) Overcurrent when passing 250mA or more with shunt resistance 75u ohm
     Is it possible to enable Sleep-Wakeup / Fault Pin in situations?
3) I want to set the overcurrent when the shunt resistance is set to 75 ohm and it passes over 250mA. How should I set up?

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guoweisun
NXP TechSupport
NXP TechSupport

HI

Please see comment  below:

1) Is it possible to activate Sleep-Wakeup / Fault Pin using GPIO 0 pin?

[gw]Yes.

3) I want to set the overcurrent when the shunt resistance is set to 75 ohm and it passes over 250mA. How should I set up?

[gw]You can try below steps:

1:set IS_OC_FLT to 1

2: configured with TH_ISENSE_OC as your desire value

3: when MEAS_ISENSE > TH_ISENSE_OC then  trigger

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jj0371
Contributor I

Thank you for your answer.

What GPIOs can wake up from sleep mode?

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guoweisun
NXP TechSupport
NXP TechSupport

Sorry that GPIO0 can be set as wake up more detail below:

Setting the GPIO_CFG1[GPIO0_CFG] bits to 10 is used to configure a GPIO0
port as an input. To program GPIO0 as wake-up input, the user must set the
GPIO_CFG2[GPIO0_WU] bit to logic 1. In this case, the device performs a wake-up on
the rising or falling edge.
By setting the GPIO_CFG2[GPIO0_FLT_ACT] to logic 1, the GPIO0 port may be used to
activate the FAULT pin in normal, sleep, and diagnostic modes of operation. This feature
allows the user to daisy chain the FAULT pin in high-voltage battery pack applications.

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jiri_kral
NXP Employee
NXP Employee

Hi, 

this community space is for S32 Design studio. Try to ask your question in https://community.nxp.com/community/other  community space. 

Jiri

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