PMM15
PMM Module
Category
Functional
Function
Device may not wake up from LPM2, LPM3, or LPM4
Description
Device may not wake up from LPM2, LPM3 or LMP4 if an interrupt occurs within 1
us after the entry to the specified LPMx; entry can be caused either by user code or
automatically (for example, after a previous ISR is completed). Device can be recovered
with an external reset or a power cycle. Additionally, a PUC can also be used to reset
the failing condition and bring the device back to normal operation (for example, a PUC
caused by the WDT).
This effect is seen when:
- A write to the SVSMHCTL and SVSMLCTL registers is immediately followed
by an LPM2, LPM3, LPM4 entry without waiting the requisite settling time
((PMMIFG.SVSMLDLYIFG = 0 and PMMIFG.SVSMHDLYIFG = 0)).
or
The following two conditions are met:
- The SVSL module is configured for a fast wake-up or when the SVSL/SVML module is
turned off. The affected SVSMLCTL register settings are shaded in the following table.
and
-The SVSH/SVMH module is configured to transition from Normal mode to an OFF
state when moving from Active/LPM0/LPM1 into LPM2/LPM3/LPM4 modes. The affected
SVSMHCTL register settings are shaded in the following table.
Advisory Descriptions
18
MSP430F67781 Microcontroller
SLAZ513AC – JANUARY 2013 – REVISED MAY 2021
Copyright © 2021 Texas Instruments Incorporated
