To designate the stages in the product development cycle, TI assigns prefixes to the part numbers of all MSP432™ MCU devices and support tools. Each MSP432 MCU commercial family member has one of two prefixes: MSP or XMS (for example, MSP432E411Y). Each support tools has one of two prefixes: MSP and MSPX. These prefixes represent evolutionary stages of product development from engineering prototypes (with XMS for devices and MSPX for tools) through fully qualified production devices and tools (with MSP for both devices and tools).

Device development evolutionary flow:

XMS – Experimental device that is not necessarily representative of the electrical specifications of the final device

MSP – Fully qualified production device

Support tool development evolutionary flow:

MSPX – Development-support product that has not yet completed TI internal qualification testing.

MSP – Fully-qualified development-support product

XMS devices and MSPX development-support tools are shipped against the following disclaimer:

"Developmental product is intended for internal evaluation purposes."

MSP devices and MSP development-support tools have been characterized fully, and the quality and reliability of the device have been demonstrated fully. TI's standard warranty applies.

Predictions show that prototype devices (XMS) have a greater failure rate than the standard production devices. TI recommends that these devices not be used in any production system because their expected end-use failure rate still is undefined. Only qualified production devices are to be used.