MSP430F6779A: Are there any cases where the MCU CPU cannot wake up from LPM3?

Hi Tink,

The only case we know is that if an interrupt occurs within 1 us after the entry to the specified LPMx, please find it in the errata PMM15.

MSP430F6779A Microcontroller Errata (Rev. V)

Let me know if that's not the case in your system.

Regards,

Sean

Hi Sean Guo,

If this case occurs (interrupt occurs within 1 us after the entry to the specified LPMx),

How to wake up the MCU (Do reset or something) ?

Yes, you can do an external reset or a power cycle.

Hi Sean Guo,

Thank you for the information.

I would like to know what type of interrupts are mentioned in the PMM15 errata?

Hi TinK,

It means any interrupt, including RTCRDY in your case.

From the errata, you may need to add a 150us delay either in the interrupt service routine or before entry into LPM3/LPM4.

Hi Sean Guo,

Thank you.

This means that if add a delay of 150us before LPM3, the interrupts (i use RTCRDY and AUXIV_AUX0SWIFG) will work without any problems. (No need to disable interrupt) Is it true?

if Configure the SVSL module for slow wake up (SVSLFP = 0), no need to used the function PMM15Check that right?