SLAZ244O October 2012 – May 2021 MSP430F4793
FLL Module
Functional
Flash operations using MCLK as the source may be affected
Flash write and erase operations that take place with the flash controller using MCLK as the source are not guaranteed to complete as expected under the following conditions:
1) When MCLK is sourced by an external clock source such as LFXT1 or XT2 and a clock fail condition occurs.
2) When MCLK is sourced from the DCOCLK by setting SELMx = 01 in FLL_CTL1 register.
1)If MCLK is used as the clock source for the flash controller (FSSEL_01.FCTL2), always source MCLK from DCO by setting SELMx = 00 in the FLL_CTL1 register.
OR
2)Use ACLK or SMCLK as the clock source for the flash controller. In this case, if the external clock source fails, the clock fail indication works as expected.