SLAZ679R August 2015 – August 2021 MSP430FR2311
CS Module
Functional
Device may enter lockup state during transition from AM to LPM3/4 if DCO frequency is above 2 MHz.
The device might enter lockup state if DCO frequency is above 2 MHz and two events happen at the same time:
1) The device transitions from AM to LPM3/4 (e.g. during ISR exits or Status Register modifications)
2) An interrupt is requested (e.g. GPIO interrupt).
This condition can be recovered by BOR/Power cycle.
1. Use DCOCLK at 2MHz or lower.
OR
2. Use LPM0/x.5 instead of LPM3/4.
OR
3. Use external high-frequency crystal if it is available on the device.
OR
4. Set DCOCLK to 2MHz or lower before entering LPM3/4, then restore DCOCLK after wake-up. Note using peripherals using clocks derived from DCOCLK might be affected during this interval.