SLAA419C October 2009 – April 2019 MSP430F5418 , MSP430F5418A , MSP430F5419 , MSP430F5419A , MSP430F5435 , MSP430F5435A , MSP430F5436 , MSP430F5436A , MSP430F5437 , MSP430F5437A , MSP430F5438 , MSP430F5438A
The SYS4 erratum, fixed in the A revisions, states that the BSL is non-programmable. Read disturb issues when executing code from non-Main memory segments of Flash were worked around in the current BSL using carefully aligned instructions, forcing it to be locked from user edit. These read disturb issues do not affect A revisions of silicon; therefore, the peripheral interface to the BSL is now user-programmable. See the MSP430™ Flash Devices Bootloader (BSL) User's Guide for further information concerning how to program the peripheral interface of the BSL.