The DS2250(T) Soft Microcontroller Module is a fully 8051 compatible 8bit CMOS microcontroller that offers "softness" in all aspects of its application. This is accomplished through the comprehensive use of nonvolatile technology to preserve all information in the absence of system VCC. The internal program/data memory space is implemented using 8K, 32K, or 64K bytes of nonvolatile CMOS SRAM. Furthermore, inter-