the motorola mc14500b industrial control unit (icu) is a cmos one-bit microprocessor designed for simple control applications. it is well-suited to the implementation of ladder logic, and thus could be used to replace relay systems and programmable logic controllers. the mc14500b unit does not include a program counter, therefore the size of supported memory is dependent on the implementation of program counter. the icu architecture is similar to that of the dec pdp-14 computer. == external links == * motorola mc14500b data sheet * motorola mc14500b application handbook * motorola's patent for the industrial control processor 
Microcontrollers Motorola_microprocessors